User guide

Manuals Brands Gimp Manuals Software - 2.2

Table Of Contents

GIMP User Manual

The GIMP Documentation Team

2000, 2001

Summary of content (198 pages)

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GIMP User Manual The GIMP Documentation Team 2000, 2001
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1 Legal Notice Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.1 or any later version published by the Free Software Foundation with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. You may obtain a copy of the GNU Free Documentation License from the Free Software Foundation by visiting theirWeb site or by writing to: Free Software Foundation, Inc.
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Contents 1 Introduction 1.1 What is The GIMP? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1.1 A Brief List of Features and Capabilities . . . . . . . . . . . . . . . . . . . . 1.1.2 Platform Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1.3 About the Help System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2 What Can GIMP Do For Me? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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CONTENTS 4.5 4.6 4.7 4.8 4.9 4.10 4.4.4 Paste Into . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.4.5 Paste As New . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.4.6 Cut Named . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.4.7 Copy Named . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.4.8 Paste Named . . . . . . . . . . . . . . . . . .
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CONTENTS 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9 4 What are Layers? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Using Layers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . The Layers Dialog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . New Layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Stack . . . . . . . . . . .
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CONTENTS 5 7.8 7.9 7.10 7.11 7.12 Copy Path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Paste Path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Export Path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Import Path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Edit Path Attributes . . . .
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CONTENTS 8.16 8.17 8.18 8.19 8.20 8.21 8.22 8.23 8.24 8.25 8.26 8.27 8.28 8.29 8.30 8.31 8.15.2 Dodge / Burn Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Elliptical Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.16.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.16.2 Elliptical Selection Options . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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CONTENTS 7 8.32 Rectangular Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.32.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.32.2 Rectangular Selection Tool Options . . . . . . . . . . . . . . . . . . . . . . . . Smudge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.33.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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CONTENTS 12.4.5 Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12.4.6 Default Comment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12.5 Display Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12.5.1 Transparency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12.5.2 8-Bit Displays . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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CONTENTS 12.32 12.33 12.34 12.35 12.36 12.37 12.38 12.39 9 The Document Index Dialog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . The Error Console Dialog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Undo History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . The Standard GIMP Color Selector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . The GTK Color Selector . . . . . . . . . . . . . .
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CONTENTS 13.39 Depth Merge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.40 Despeckle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.41 Destripe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.42 Diffraction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.43 Displace . . . . . . . .
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CONTENTS 13.84 iWarp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.85 Jigsaw . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.86 JPEG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.87 Laplace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.
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CONTENTS 13.132 Selective Gaussian Blur . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.133 Selection to Path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.134 Semi-Flatten . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.135 SGI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.136 Sharpen . . . . . . . . . . . .
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CONTENTS 13 14 Keyboard Shortcuts 171 15 Command Line Options 15.1 GIMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15.2 GIMP Tool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15.3 GIMP Remote . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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CHAPTER1 Introduction 1.1 What is The GIMP? Introduction The GIMP is an acronym for GNU Image Manipulation Program. The GIMP is an application suitable for such tasks as retouching of photographs, composing and authoring images. Its capabilities as an image manipulation program make it a worthy competitor to other similar programs such as Adobe P HOTOSHOP or Corel P HOTO PAINT. The biggest advantage of The GIMP is it’s free availability (e.g.
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CHAPTER 1. INTRODUCTION 15 • File formats supported include PostScript, JPEG, GIF, PNG, XPM, TIFF, TGA, MPEG, PCX, BMP and many others. • Selection tools including rectangular, elliptical, free, fuzzy, paths, and intelligent scissors. • Plug-ins that allow for the easy addition of new functions, new file formats, and new effects filters. 1.1.2 Platform Support The GIMP is probably most known for its use on the GNU/Linux platform, but there are many platforms that GIMP can run on.
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CHAPTER 1. INTRODUCTION 16 made up of “pixels” – tiny rectangles1 which each have a single set color. These pixels are colored in a way to make up images. The other common method of handling images is in “vectors”. A vector image is made up of primitives such as lines, curves, circles, rectangles and fills. GIMP has some support for vector drawing in the G FIG plug-in, but it is not a complete editing environment and shouldn’t be used for the creation of complex vector diagrams. 1.2.
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CHAPTER 1. INTRODUCTION 17 it would be helpful to know which window manager you are using. Another question that could be asked is whether GNOME or KDE (if either) is being used. Another useful tidbit of information that is valuable for diagnosis is stating exactly what it is that has caused the problem. Simply saying, “The foo plug-in doesn’t work.” is not very helpful. Try to be as explicit as possible, “When I clicked ’foo-button’ in the ’bar-plugin’ GIMP told me that such and such didn’t work.”.
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CHAPTER2 Using GIMP 2.1 Starting for the First Time When you launch T HE GIMP for the first time, you will see a special dialog box. This allows you to setup T HE GIMP to your personal settings, without affecting the way T HE GIMP runs for other users. The first thing you’ll see is the license to T HE GIMP – the GNU General Public License. Click continue if you accept the license. 2.1.1 User Directory T HE GIMP now needs to create a directory to hold your personal settings.
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CHAPTER 2. USING GIMP 19 You can change these settings later in T HE GIMP’s Preferences Dialog. 2.1.3 Monitor Resolution Every monitor is slightly different, and, to make images look correct, T HE GIMP needs to know the resolution of your monitor. You may find information on your monitor’s resolution in its manual. If you are not sure, click Calibrate. You need to then find a ruler and measure the length of the white bars. Enter their measurements in the horizontal and v ertical boxes.
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CHAPTER 2. USING GIMP 20 The Image Window 20 shows the Image Window created by the default settings. When you first start, no image window will be open because no images are open. To create a new image, click New... from the File menu. The white section of 20 is the area in which you create your image. The image above is 256 x 256 pixels. If your image is larger, you may need to use the scrollbars at the right and bottom of the image area to view the whole image.
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CHAPTER 2. USING GIMP 21 2.3.
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CHAPTER 2. USING GIMP 22 However, XCF is only suitable for GIMP. If you want to share your image or put the image on the web, you should probably use another file formatas well as XCF because most web browsers, image viewers, and other software packages cannot read XCF. See also: XCF Glossary entry PNG: Portable Network Graphics PNG can preserve all the transparency and color of your original image and uses powerful lossless compression to reduce file sizes.
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CHAPTER 2. USING GIMP 23 XPM: X Pixmap This format is sometimes used by applications for the X W INDOW S YSTEM. The files created can be compiled directly into a program by a software developer, but this convenience comes at a price of much increased file size. You will probably already know if this feature is useful to you. Some web browsers have included support for viewing XPM images but this is not common, so you should avoid using them on the web.
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CHAPTER3 ToolBox 3.1 Toolbox Introduction In this chapter we’ll explain to you the menus and buttons of the Toolbox. 3.2 The ToolBox One of the windows that is most central to the use of T HE GIMP is the ToolBox. The ToolBox The ToolBox consists of the menu bar with the entries File, Xtns and Help, the tools buttons which are the set of square buttons in 24, the color selector which is at the bottom left, and the tools status indicators which are at the bottom right.
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CHAPTER 3. TOOLBOX 25 You can also unload a module on the fly, e.g. you may not want the watercolor color selector. If you unload a module, the functionality provided by the module will no longer be available in your current GIMP session. To enable the functionality again, you have to mark the module and reload it. 3.4 Help Page for Help Well, what about a help page for a help.
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CHAPTER4 Image 4.1 Image Menu Introduction This chapter will explain the GIMP Image main menu and its submenus. All operations here a basic functions on image properties and global program functionality such as selections, views, clipboards and basic manipulations with lookuptables. 4.2 The Image Window Image The image window is the one that you will see when you are composing your image. The Image Window The main part of the window is the section in which your image can be created.
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CHAPTER 4. IMAGE 27 Also at the bottom of the image window (on the Statusbar) is the filename and other information about the image such as the zoom level. This is also displayed as the title to the window. The information displayed can be configured in Preferences ( Image Windows, Image Title Format). Next to this is a section which displays a progress bar when an operation will take a long time. That action can be aborted by clicking the Cancel button next to it.
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CHAPTER 4. IMAGE 4.4 28 Clipboards 4.4.1 Cut The Cut function allows you to delete a selection save it to the GIMP clipboard. It can then be recalled with the Paste, Paste Into, and Paste As New commands. If no selection is made, GIMP cuts the entire current layer. Additional Information Default Keyboard Shortcut: Ctrl X 4.4.2 Copy The Copy command allows you to make a copy of the current selection, which is then stored in the GIMP clipboard.
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CHAPTER 4. IMAGE 29 4.4.6 Cut Named Cut the current selection to a named buffer. You can cut several parts to different buffers by giving them different names. Later on you are able to paste a selected buffer by invoking Image Menu> Edit> Buffer> Paste Named.... If you don’t specify a selection, the whole active layer is cut. Additional Information Default Keyboard Shortcut: Shift Ctrl X 4.4.7 Copy Named Copies the current selection of the image to a named buffer.
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CHAPTER 4. IMAGE 30 4.5.2 Fill Fill fills the selected area with the foreground color for Fill with FG Color or background color Fill with BG Color. If no selection is made, GIMP fills the entire layer. Additional Information Default Keyboard Shortcuts: Ctrl , for filling with the foreground color, Ctrl . for background. 4.5.3 Stroke The Stroke command is used in conjunction with the selection tools to create shapes which would be difficult to draw freehand.
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CHAPTER 4. IMAGE 31 If you drag a selection, it will automatically be converted into a floating one. Additional Information Default Keyboard Shortcut: Shift Ctrl L 4.6.5 Feather Selection In the Feather Selection dialog you select by how much you want to feather the selection. Feather Selection produces a selection with fuzzy edges. In other words, when a selection is feathered, it becomes more and more transparent until it reaches the edges of the selection.
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CHAPTER 4. IMAGE 4.7 32 Customizing the view 4.7.1 Zoom The Zoom functions allow you to modify the magnification on an image. It enables you to zoom out on large images so the entire image is visible, or to zoom in on an image to do pixel-level editting. Zoom in zooms 100% in each time it is clicked up to a maximum of 1600%. Zoom out zooms out at progressively smaller intervals to a maximum of 6%.
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CHAPTER 4. IMAGE 33 in) or clicking the magnifying glass icons. You can also drag the highlighted square to pan the image (to change which part is viewable in the image window). Additional Information Default Keyboard Shortcut: Shift Ctrl N 4.7.5 Toggle Selection Turns on and off the appearance of the dotted selections (marching ants). The selection still exists when the dotted lines are turned off.
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CHAPTER 4. IMAGE 34 Changes made in one view will appear in other views. It is very useful for maintaining an overall view of an image while working on close-up retouching. 4.7.11 Shrink Wrap Makes the borders of the image window shrink or grow to the same size as the image itself. Additional Information Default Keyboard Shortcut: Ctrl E 4.8 Changing the imagetype 4.8.
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CHAPTER 4. IMAGE 35 Use custom palette If you want to use a predefined palette, you have to use this option. You then choose your palette from the drop down menu. By default it’s W eb palette. The W eb palette is the palette used by web browsers such as N ETSCAPE. This will help you create web-safe indexed images. There is some debate over indexing against the Web palette.
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CHAPTER 4. IMAGE 36 A good alternative to transparency dithering is the Rightclick> Filters> Colors> Semi-Flatten function. Additional Information Default Keyboard Shortcut: Alt I 4.9 Image operations with lookuptables 4.9.1 Desaturate Desaturate is used for removing color from the current selection. If no selection is made, color is removed from the entirety of the current layer.
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CHAPTER 4. IMAGE 37 If the “ Wrap Around” button is checked, the parts of the image that move outside the layer border will turn up on the other side of the image. If you don’t want this, you can choose to fill the empty area with the background color or with transparency. Additional Information Default Keyboard Shortcut: Shift Ctrl O 4.10.2 Set Canvas Size Canvas Size The image canvas is the boundary of the image.
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CHAPTER 4. IMAGE 38 you still want the same image size but a lower resolution. It will naturally be vice versa if you increase the resolution. Pixel Dimension area is used to resize the pixels. If theLayers of your image have different sizes, it is possible that making the image smaller will shrink some of them completely away. If this happens, you will bewarned before the operation is applied. 4.10.
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CHAPTER5 Layers 5.1 What are Layers? Layers When you create an image, it is made up of thousands of tiny pixels, each of which has a color, position, and form the image. It can be hard to work on an image organized at this level. It is also hard to work on an entire image as one block – this is the reason for layers. Layers are in between the tiny size of pixels and the large size of the whole image.
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CHAPTER 5. LAYERS 40 3D Representation of an Image with Layers The Final Image Layers are one of the most powerful features in GIMP so it is important to understand how they can be used. 5.2 Using Layers Layers Layer-related functions in GIMP are performed in theLayers Dialog which can be from File Dialogs Layers, Channels& Paths...
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CHAPTER 5. LAYERS 41 The Layers Dialog At the top of the dialog is a combo-box which defines what image the layers dialog is displaying. If Auto is selected, the currently focused image will be the default. Alternativly, you can change the image by clicking on the box and selecting a different image from the menu. A small preview of the image is given next to its name. The most useful part of the dialog is the area with the off-white background in 41. This shows all the layers in the image.
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CHAPTER 5. LAYERS 42 The Layers Menu 5.3 The Layers Dialog The Layers Dialog is the main interface to interact withLayers present in a GIMP image. You can think of layers as a stack of slides or clothes on your body. GIMP gives you several methods of combining layers with help of modes. The mode of a layer will determine how it will interact with other layers present in the image. Before you can do anything with a layer, the layer must be activated.1 You do so by clicking on the layer name.
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CHAPTER 5. LAYERS 5.4 43 New Layer Will create a new layer. You can set the new layers attributes in the Layer Name field please seeEdit Layer Attributes for an explanation of layer attributes. Just as inNew Image can you also set the "Fill Type" to either the Foreground or Background color of theToolBox, White or totally Transparent. The size of the layer can be set in a number of different ways and units.
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CHAPTER 5. LAYERS 44 The Size area will control how big or small your new layer boundary will be just as when you created aNew Layer. The Offset area will control how your layer is clipped or expanded. The Offset fields will control where your upper left corner of the old layer will be in the “new” layer. The best way to control the new location and how and where the layer will be clipped is to drag the “layer preview” in the Offset area to the right position.
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CHAPTER 5. LAYERS 45 Expanded as necessary The final layer has the size of the largest layer of all of the visible layers. (Remember that a layer in GIMP can be larger than the image) Clipped to image Will set the final layer size equal to the image size. (Remember that layers in GIMP can be larger than the image it self. If you have such a visible layer it will be clipped to the image size). Clipped to bottom layer Will set the final layer size equal to the bottom layer.
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CHAPTER 5. LAYERS 46 result of your mask applied to the layer. To see the mask you have to Alt click on the thumbnail. If you want to see you layer without the mask applied, Ctrl click on the mask thumbnail. Remember to click once again with the same modifier key to exit the current "preview" state. 5.16 Apply Layer Mask Sorry, but the help page for "Apply Layer Mask" is not written yet. 5.17 Delete Layer Mask Sorry, but the help page for "Delete Layer Mask" is not written yet.
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CHAPTER6 Channels 6.1 Channels Introduction This chapter will explain the use of channels. 6.2 The Channels Dialog Channels The Channels tab displays the three RGB channels, showing the current red, green, or blue color values of each pixel in your image. The RGB channel thumbnails are grayscale representations of each color channel with white representing 100color and black representing no color. The RGB channels each have an icon, so you can look at your image in a single color channel.
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CHAPTER 6. CHANNELS 48 6.2.1 Selections and Channels You are able to store a selection as a channel with the r ightclick Select Save To Channel command. This creates a new channel where you can paint, erase, and perform any other drawing function. The altered channel can be turned into a selection again by clicking on the Channel To Selection button. This is a very convenient way to alter selections and store several selections.
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CHAPTER 6. CHANNELS 6.8 49 Delete Channel Deletes the active channel. The channel below the deleted channel will become the active channel. You cannot delete the standard Red, Green, or Blue channels. This is the equivalent of clicking the icon. 6.9 Edit Channel Attributes Allows you to alter the name, color and fill opacity of the channel. The fill opacity is useful for setting how visible the underlying image is when you work with a channel that will later be converted to a selection.
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CHAPTER7 Paths 7.1 Paths Introduction In this chapter we’ll explain to you how you can work with paths. 7.2 The Paths Dialog Basically paths are a way to storebezier selections. Limiting paths to that statement misses a lot of their functionality, however. A better way to see it is as a way to manage vector curves. If you are familiar with vector drawing programs such as A DOBE I LLUSTRATOR and C OREL D RAW, then paths will be something very familiar.
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CHAPTER 7. PATHS 51 Path to Selection Will create a selection out of a path. Notice that the path doesn’t have to be closed. The created selection will simply join the endpoints with a line that will follow the curve’s direction in each endpoint. Selection to Path Will create a path out of a selection. Beware of complicated selections such as selections done by quick mask or select by color. Such selections will create very complex paths which are hard to control.
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CHAPTER 7. PATHS 52 Remove Point Will remove a point in your curve. The point must be between the endpoints in a non-closed curve. If the curve is closed it can be any point within the curve. However you always have two points in the curve. Edit Point Will allow you to adjust the curve. When you click on an anchor point, two little handles appear. If you pull the they will change size and handles, direction and shape a curve. By pressing Ctrl , you can move an anchor point anyway you like.
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CHAPTER 7. PATHS 53 fading out, this will be honored when the path is stroked. This applies to any of the modes that the painting tool accepts. The following paint tools work when stroking a path. They need to be the currently active tool to work. If no paint tool is selected, then the "Paintbrush" tool is used. • Pencil • Paintbrush • Eraser • Airbrush • Clone • Convolver • Dodge or Burn • Smudge 7.7 Delete Path Deletes the currently active path. The path below it becomes the active path.
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CHAPTER 7. PATHS 7.10 54 Export Path Will export the path to a file which can later beimported to another image. It may sound simple, but it is important. Besides the basic selection-related paths, there is also the possibility of painting with paths. Storing paths in a path library will make painting with paths much easier. 7.11 Import Path Lets you import a path from a file. Please see Export Path. 7.12 Edit Path Attributes Enables you to rename a path.
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CHAPTER8 Tools 8.1 Tools Introduction This chapter contains descriptions of all GIMP tools. 8.2 Tool Options Dialog The Tool Options dialog will show the tool options for the active tool. Please see 55 for a complete list of tools and tool options. Depending on if you have global or local tool options, the Tools Options dialog for each tool can look a bit different. Please seeInterface Settings. 8.3 8.3.1 Airbrush Overview The Airbrush tool replicates a traditional airbrush.
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CHAPTER 8. TOOLS 56 Pressure This slider controls the amount of color that the airbrush paints. A higher setting here will result in darker strokes. Additional Information Default Keyboard Shortcut: A Key modifiers: • Ctrl changes the tool to a Color Picker that sets the foreground color. • Alt changes the tool to a Color Picker that sets the background color. • Shift is used to create straight lines.
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CHAPTER 8. TOOLS 57 8.5.1 Overview The Blend tool renders a gradient based on the current foreground and background colors. The start and end points are set using the mouse. Simply drag and drop a line, and the gradient will be rendered using the foreground color as the start and the background color as the end. The quality of the resulting gradient will depend on the maximum number of colors available to the blend tool. 8.5.
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CHAPTER 8. TOOLS 58 • Conical (asymmetric): Creates a gradient similar in detail to the Conical (symmetric) one, but the gradient is not reversed at the half-way point. • Shapeburst (angular): Maps the layer or selection shape prior to rendering the gradient. The resulting blend effect is based on that shape. The start and end points do not matter. • Shapeburst (spherical): This method is similar to the Shapeburst (angular) method except that the shape of the final render is less angular.
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CHAPTER 8. TOOLS 59 Preview The Preview checkbox toggles the use of a dynamic update of the active layer or selection. If this option is turned on, any changes made to the Brightness or Contrast sliders will be seen immediately. 8.7 Bucket Fill 8.7.1 Overview The Bucket Fill tool is used to fill areas of a layer or selection with either color or a pattern. 8.7.2 Bucket Fill Tool Options Bucket Fill Settings Opacity The Opacity slider sets the transparency level for the fill.
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CHAPTER 8. TOOLS 8.8 60 By Color Selection 8.8.1 Overview The Select by Color tool is capable of selecting areas of the current layer using color. Unlike the Fuzzy Selection Tool , the Select by Color tool will make selections across the entire layer, not just adjoining areas. 8.8.2 Select by Color Options There are many options that make Select by Color very powerful.
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CHAPTER 8. TOOLS 8.9 61 Clone 8.9.1 Overview The Clone tool uses the current brush to copy from a source point. The source point can be in an image or pattern. 8.9.2 Clone Tool Options Clone Settings Opacity The Opacity slider sets the transparency level for the paint. A higher opacity setting results in more opaque paint and a lower setting results in more transparent paint. Mode The Mode dropdown list provides a selection of paint application modes. A list of these modes can be found in the glossary.
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CHAPTER 8. TOOLS 62 8.10.2 Color Balance Options Color Balance Settings Color Levels The Color Levels input boxes provide a manual way of selecting the RGB weights. The first box corresponds to the Red level, the second to Green, and the third to Blue. RGB Sliders The three sliders adjust the color balance interactively. Shadows, Midtones, and Highlights Selecting one of these options will restrict the range of colors that are changed with the sliders or input boxes for Red, Green, and Blue.
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CHAPTER 8. TOOLS 63 8.12.2 Convolver Options Convolve Settings Opacity The Opacity slider sets the transparency level for the operation. A higher opacity setting results in a more opaque render and a lower setting results in a more transparent one. Pressure Sensitivity The Pressure Sensitivity section sets whether hardness, rate or size will be effected by pressure for input devices that support this option. Rate The rate slider sets the strength of the convolve effect.
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CHAPTER 8. TOOLS 64 Tool Toggle This option will toggle between Crop and Resize. Crop will do exactly that. It will crop the image to the selected area. Resize will crop the canvas, but leave the original layer as they were. This toggle can be switched dynami sizes cally by holding the Ctrl key. 8.13.3 Crop and Resize Information This dialog becomes available when the cropping region is mapped by clicking and dragging an area of the image.
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CHAPTER 8. TOOLS 65 Curve Type Curve type allows you to choose between Smooth or Free. • Smooth: This mode constrains the curve type to a smooth line with tension. This mode provides a more realistic render than Free mode. • Free: This mode allows free-hand drawing of the curve using yourmouse. This mode provides more control than the Smooth mode. Main Editing Area The main editing area of the curves window provides the actual modification area of the tool. The curve can be changed using themouse.
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CHAPTER 8. TOOLS 66 • Ctrl Shift places the tool into straight line mode and constrains the angle of the created lines to 15 degrees. 8.16 Elliptical Selection 8.16.1 Overview Elliptical Selection creates circular selection areas. The Selection is constructed by clicking and dragging over the area that is to be selected. 8.16.2 Elliptical Selection Options Elliptical Selection Settings Feather The Feather slider sets the amount of feathering to create around the rendered selection area.
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CHAPTER 8. TOOLS 8.17 67 Eraser 8.17.1 Overview The Eraser is used to remove blocks of color from the current layer, selection, or image. If the Eraser is used on on the Background layer, the eraser will remove color areas and replace them with the current background color. If used on a normal floating layer, the color will be replaced with transparency. The same rules apply to non-alpha images. 8.17.
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CHAPTER 8. TOOLS 68 8.18.2 Flip Tool Options Flip Tool Settings Tool Toggle The T ool Toggle settings control flipping in either a Horizontal direction or a Vertical one. This toggle can also be switched using a key modification. Additional Information Default Keyboard Shortcut: Shift F Key modifiers: • Ctrl toggles the flip direction. 8.19 Free-Hand Selection 8.19.1 Overview Free-Hand Selection allows hand drawn selection areas.
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CHAPTER 8. TOOLS 8.20 69 Fuzzy Selection Magic Wand 8.20.1 Overview The Fuzzy Selection tool is used to select contiguous regions of similar color weight. 8.20.2 Fuzzy Selection Tool Options Fuzzy Selection Settings Feather The Feather slider sets the amount of feathering to create around the rendered selection area. Feathering softens the edge of the selection by the specified number of pixels. See also:Feather Selection.
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CHAPTER 8. TOOLS 8.21 70 Histogram 8.21.1 Overview The Histogram tool displays detailed pixel intensity information about the image or a channel. The main area of the Histogram window is the graphical representation of the intensity levels across the entire luminosity range for the image. Ranges can be selected with themouse by clicking and dragging the range from within the histogram. 8.21.
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CHAPTER 8. TOOLS 71 8.22.2 Hue-Saturation Options The Hue-Saturation dialog window allows the selection of the color range that will be affected by the sliders. The colors are listed on the left side of the dialog and can be selected individually for tighter control or globally using Master for changes that will affect all pixels. Hue-Saturation Settings Hue The Hue slider changes the hue of the selected pixel color. Lightness The Lightness slider changes the lightness of the selected pixel color.
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CHAPTER 8. TOOLS 8.24 72 Intelligent Scissors 8.24.1 Overview The Intelligent Scissors can be used to select contiguous areas of similar color weight in a fashion similar to the Fuzzy Selection Tool. The primary difference is that the scissor tool creates the selection area one line at a time. Clicking with Button1 will create nodes that are intelligently joined using lines that attempt to follow color weights. Once the area is closed, clicking inside the new area will render the selection area.
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CHAPTER 8. TOOLS 73 Modify Levels for Channel The Modify Levels for Channel button allows the selection of the specific channel that will be modified by the tool. • Value: This option makes intensity changes against all pixels in the image. • Red: This option makes changes to he Red channel only. • Green: This option makes changes to the Green channel only. • Blue: This option makes changes to the Blue channel only.
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CHAPTER 8. TOOLS 8.27 74 Measure 8.27.1 Overview The Measure tool displays the distance and bearing between two points in your image. To measure, click and drag using Button1 between two points. Each point can be dragged to a new position. 8.27.2 Measure Tool Options Measure Tool Settings Use Info Window The Use Info Window checkbox will toggle the sending of information to the Info Window Dialog.
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CHAPTER 8. TOOLS 75 8.29.1 Overview The paintbrush tool paints fuzzy brush strokes. All strokes are rendered using the current brush. See also: Brush Selection. 8.29.2 Paintbrush Options Paintbrush Settings Opacity The Opacity slider sets the transparency level for the paint. A higher opacity setting results in more opaque paint and a lower setting results in more transparent paint. Mode The Mode dropdown list provides a selection of paint application modes.
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CHAPTER 8. TOOLS 76 • Alt changes the paintbrush to a Color Picker that will set the background color. • Shift places the paintbrush tool into straight line mode. Holding Shift while clicking Button1 will generate a straight line. Consecutive clicks will continue drawing straight lines that originate from the end of the last line. 8.30 Pencil Straight Line Tools 8.30.1 Overview The Pencil tool is used to draw free hand lines with a hard edge.
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CHAPTER 8. TOOLS 8.31 77 Posterize 8.31.1 Overview The Posterize tool is designed to intelligently weigh the pixel colors of the selected area or active layer and reduce the number of colors while maintaining a semblance of the original image characteristics. 8.31.2 Posterize Tool Options Posterize Tool Settings Posterize Levels The number of levels used here represents the number of colors that the tools will use to describe the active layer or selection. This number does not include black and white.
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CHAPTER 8. TOOLS 78 • Ctrl is used to subtract from existing selections and constrain the origin of the selection such that the initial click determines the center of the selection. Simply release Ctrl prior to releasing Button1 if non constrained selection subtraction is required. • Alt is used to move an existing selection. • Shift is used to add to existing selections or to constrain the selection shape such that the height and width remain equal.
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CHAPTER 8. TOOLS 8.34 79 Text Tool 8.34.1 Overview The Text tool places rendered text as a new selection. Prior to clicking on the image, the standard GTK font chooser will be displayed. The font that will be used for rendering can be selected from this dialog. 8.34.2 Text Tool Options Text Settings Antialiasing Antialiasing will render the text with much smoother edges and curves. This is achieved by slight blurring and merging of the edges.
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CHAPTER 8. TOOLS 8.36 80 Transform Tools 8.36.1 Overview The Transform tool is used to modify the active selection or layer in one of four ways. 8.36.2 Transform Tool Options Transform Settings Transform The T ransform section of the T ransform Tool Options allows the selection of type of transform that will be applied. Modes Rotation This mode rotates the layer or selection. See: Rotation. Scaling This mode scales the active layer or selection. See: Scaling.
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CHAPTER 8. TOOLS 81 Center Center X displays or sets the X-axis for the rotation axis point. The axis can be moved with themouse by clicking and dragging. Center Y displays or sets the Y-axis for the rotation axis point. The axis can be moved with themouse by clicking and dragging. Rotate The Rotate button tells the tool to perform the rotation. Reset The Reset button resets the rotation settings to the original values. That is, those values that were present prior to modification.
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CHAPTER 8. TOOLS 82 8.36.6 Perspective The Perspective tool changes the visual perspective angles of the current layer or selection. Perspective can be altered for each of the four corners of the area. Simply click and drag the corner grid to the required location. Perspective Information Matrix The Matrix information describes the Perspective transformation using matrix based mathematics. Transform The Transform button tells the tool to perform the Perspective adjustments.
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CHAPTER9 File 9.1 File Operations Introduction This chapter will explain how you can save your work as files and load it again later. For a list of file formats which The GIMP supports, see 20. 9.2 New Image File New will create a new image in either RGB (color) or grayscale mode. You can’t create an indexed image since GIMP will not know which colors your palette should have. Working in indexed mode is usually not a good choice. Instead work in RGB and convert to indexed just before saving the image.
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CHAPTER 9. FILE 84 The Reset button resets all values to their default values. image. Additional Information OK creates a new Default Keyboard Shortcut: Ctrl N 9.3 Open File Open dialog is where you can load images into GIMP for viewing or editing. The left hand window shows the directories and the right hand window shows the files in the selected directory. To open a file, select it in the files listing then choose the correct file type.
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CHAPTER 9. FILE 85 The Save dialog like any other file dialog, but you also have two means of works fast navigation. TAB completion, if you have a directory /gimp and the Save dialog is currently with in the /home/gimp directly. Then you only have to type /gi and hit TAB and the name will be completed (it works just like TAB completion in the BASH or TSH shells in UNIX or if you have turned it on as TAB completion in the CMS in NT).
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CHAPTER 9. FILE 9.8 86 Quit The Quit entry on both the Toolbox and image File menus closes all open images and exits GIMP. If any images are unsaved, GIMP will prompt you – click Quit to continue or Cancel to leave GIMP and all images open. Additional Information Default Keyboard Shortcut: Ctrl Q 9.9 Really Close Confirmation dialog for closing an image that has unsaved changes. If you click Close, the image will close and all unsaved changes will be lost. 9.
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CHAPTER10 Open 10.1 Opening Images To open images in The GIMP, use theFile Open dialog. See 20. 10.2 Open by Extension When you choose Open from either the Image or ToolBox File menus, you can select how GIMP opens files in “ Determine File Type”. You can either select a specific format so GIMP will open all files regardless, of their extension, in that format or you can select “ Automatic” which opens the file in whatever format corresponds to the file’s extension.
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CHAPTER11 Save 11.1 Saving Images To save your images to disk, use theFile Save dialog. See 20. 11.2 Save by Extension When saving a file using the File> Save As... menu entry, you can either select a particular file format in “ Save Options”, or you can choose “ Save by Extension”. This simply means that GIMP will save the file using whatever format relates to the extension that has been given to the filename – for example, typing foo.jpg would save the file as a JPEG.
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CHAPTER12 Dialogs 12.1 Dialogs Introduction This chapter contains descriptions of all GIMP dialogs. 12.2 Layers, Channels and Paths Dialog The Layers, Channels and Paths dialog is an “auto switching dialog”, which means that the current image is the one shown in the tab folders of the dialog. You can turn off Auto and choose another opened image in the Image drop down menu. Please see each tab’s help page for help about • The Layers Dialogs • The Channels Dialog • The Paths Dialogs.
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CHAPTER 12. DIALOGS 12.4 90 New File Settings 12.4.1 Default Image Size and Unit The top fields will allow you to set the size in pixels and the bottom field will allow you to set the size in an arbitrary length unit. The difference between the two of them is that if you specify the the size in e.g. inches then the size in pixels is dependent of the image resolution. I.e. if you decrease the default resolution, you will decrease the size in pixels, but not the real size. 12.4.
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CHAPTER 12. DIALOGS 91 The white, black and gray only options disable checks and the transparency will be shown as a solid black, white, or gray color. Check Size Sets the size of the checks in the pattern that indicates transparency. If you have set the check type to white, gray, or black only, then the size will have no effect what so ever. 12.5.
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CHAPTER 12. DIALOGS 92 Recent Documents List Size Sets the number of previously opened or saved documents that you can directly access from the Toolbox File menu. Toolbox Display Brush, Pattern and Gradient Indicators In theToolBox there is an area displaying the currently active brush, pattern, and gradient. If you don’t want the area to be present in the ToolBox you can disable it here.
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CHAPTER 12. DIALOGS 93 Marching Ants Speed When you make a selection in GIMP there will be a “blinking” boundary for the selection. This “blinking” boundary is referred to as marching ants. This option controls how fast the ants will march. Image Title Format Sets the window title of the image window. The default custom value is reasonably sane, but you are able to choose from Standard, Show zoom percentage, Show zoom ratio, Show reversed zoom ratio, and Custom.
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CHAPTER 12. DIALOGS 94 Finding Contiguous Regions Default Threshold Here you can choose the default threshold for all tools which is a measure for the precision of filling and masking tools. 12.7 Environment Settings 12.7.1 Resource Consumption Conservative Memory Usage The GIMP is optimized to speed i.e. speed is more important than memory usage. Enabling “Conservative Memory Usage” will “optimize” GIMP to use less memory.
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CHAPTER 12. DIALOGS 95 thumbnail. If you set this option to Never, you have to press the Thumbnail button in theFile Open Dialog to be able to see a thumbnail of your image. "File> Save" Saves the Image This is by default set to “Always” but if you save your image on a networked disk ( NFS, SMB etc.), saves are sometimes slow and saving isn’t always that necessary. Instead you will only save when the file is really changed. 12.8 Session Management 12.8.
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CHAPTER 12. DIALOGS 96 You don’t really want to calculate your resolution manually, so simply press the Calibrate button to pop up a dialog where you can measure two rulers and enter their lengths in spin buttons. 12.10 Directories GIMP uses several directories to store such things as add-on filters (plug-ins), scripts, brushes, etc., but also its swap and temporary files. The top view in Directories controls T emp Dir and Swap Dir.
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CHAPTER 12. DIALOGS 97 12.11.1 Preview and Brush Information You will see that some of the brushes in the dialog have a little + sign. The + sign is indicating that the brush preview is scaled to fit the space. To view the real size of the brush, click and hold on the brush square and the real size brush will appear (and disappear when you release the mouse). When you choose a brush, the name and the size of the brush will appear in the brush dialog. The brush size is measured in pixels. 12.11.
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CHAPTER 12. DIALOGS 98 The Aspect Ratio defines the vertical diameter in a ratio to the horizontal diameter. A value of 1.0 will give a round brush since this means that the horizontal diameter is the same as the vertical. The maximum value is 20.0 which gives a horizontal diameter twenty times larger than the vertical, resulting in a very squashed, elliptical brush. The final setting is Angle which is used when the aspect ratio is more than 1.0.
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CHAPTER 12. DIALOGS 99 You can edit the left or right color by invoking left or right endpoint color. The Load From and Save To menu options allow you to load a color from an RGBA channel to an endpoint or to save an RGBA channel. In the Blending function submenu from the Segment menu, you will find some functions that control the appearance of the gradient in your selection. The Coloring type submenu from the segment menu lets you choose a color model for your selection or segment.
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CHAPTER 12. DIALOGS 12.18 100 Rename Gradient Lets you specify a new name for a gradient. When you rename a gradient, the renamed gradient will appear in your personal GIMP gradient directory. If, however, you have the permission to alter files in the system-wide GIMP gradient directory, the file will be erased from that directory. This means that other users on the system will not be able to use the gradient even if you only renamed it. So you need to be sure what you are doing.
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CHAPTER 12. DIALOGS 101 also edit a palette in the Palette tab folder, but the Color Palette Editor gives more options. Palette Within the Palette tab, you interact with your palette. The primary usage of the dialog is, naturally, to choose colors from the palette. It is very cumbersome to use the color selector to choose colors when you work with a project. The best way to work is to have a color palette. You can, however, also use this window to edit the palette.
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CHAPTER 12. DIALOGS 102 New Palette Will create a new, empty palette in the edit frame. A confirmation window with aname field will appear. When you have created your new palette, you have to insert color cells. You do that by right-clicking anywhere in the edit area and selecting New from the popup menu. Delete Palette Will delete your palette. Import Palette Will bring up theImport dialog where you can create a new platte from a gradient, image, or indexed palette.
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CHAPTER 12. DIALOGS 103 Import from Image Select Image as source Set the name of the palette you are about to create. Choose the one of the currently opened images from which you want to create a palette. You will create the palette from all visible layers within that image. (as if you had merged all visible layers). Please see 39 for an explanation of layer functions. Set the Interval, which will control – TODO Set the amount of colors that you want in the palette in the Sample Size field.
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CHAPTER 12. DIALOGS 104 Altering a color Choose the color that you want to alter by clicking on it. Choose edit from the Operation menu. This will bring up the GIMP color selector which enables you to pick a replacement color. Adding a color If your indexed image contains less that 256 colors, then you can add a color. Choose Add from the Operation menu. A new color will appear as the last color in the palette. The new palette color is a copy the previous color in the palette.
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CHAPTER 12. DIALOGS 12.33 105 The Error Console Dialog The Error Console will show internal GIMP error messages. An example of such an error is when GIMP fails to save or load an image. If you encounter a bug in GIMP, it can be wise to open the error console and try to reproduce the bug. If GIMP then produces any error messages, you can email bugs@gimp.org the message along with a bug description to the GIMP developers at gimp-developer@scam.xcf.berkeley.edu. 12.
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CHAPTER 12. DIALOGS 12.37 106 The Triangle Color Selector The triangle color selector is one of the best color selectors in GIMP. This is due to the fact that it allows you to visualize hue, value and saturation simultaneously. You control the hue by dragging the triangle around in the outer circle. When you have selected your base color, you simply alter the value and saturation by pressing and dragging inside the triangle color scale. 12.
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CHAPTER13 Filters 13.1 Filters Introduction This chapter describes the many filters, plug-ins, and tools that ship with T HE GIMP by default. 13.2 Reshow Last Filter The Re-Show Last command will redisplay the last used filter that was applied to the image. Additional Information Default Keyboard Shortcut: Shift Alt F 13.3 Repeat Last Filter The Repeat Last Filter command will apply the most recently run filter again.
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CHAPTER 13. FILTERS 108 Density Density controls the amount of dust elements that will populate the layer. A setting that is too high here can become extremely processor-intensive, so adjust this setting carefully. Seed Seed is the numeric randomization base. Changing this number will result in different dust element shapes and positions. Length Length controls the length of the dust artifacts. A higher setting here will result in longer curls of dust. 13.
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CHAPTER 13. FILTERS 109 Modify Blue/Luminance Channel This checkbox allows modifications to be made to the Blue or Luminance of the active selection or layer. Frequency Sliders The F requency sliders control changes to the applicable channel. The slider determines the frequency intensity at which the colors will be mapped. Phaseshift Sliders The Phaseshift sliders control changes to the applicable channel. The slider determines the shift in frequency that will be used to map the channel colors.
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CHAPTER 13. FILTERS 13.10 110 Animate Cells Our apologies Sorry, but the help page for this item is not written yet. Can I help? Yes, you can! Please send a message to docs@gimp.org with Animate Cells as the subject line. Feel free to also include documentation related suggestions or fix requests. 13.11 Animation Play Our apologies Sorry, but the help page for this item is not written yet. Can I help? Yes you can! Please send a message to docs@gimp.org with animationplay as the subject line.
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CHAPTER 13. FILTERS 13.14 111 Apply Canvas Overview This filter applies a canvas-like effect to the current image. It textures the image as if it were an artist’s canvas. This filter is comparable to the GIMPressionist filter . The Apply Canvas Options Apply Canvas Settings Direction The four selectable directions make very little difference to the final render. Direction sets the starting direction of the canvas render.
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CHAPTER 13. FILTERS 13.17 112 Blended Our apologies Sorry, but the help page for this item is not written yet. Can I help? Yes, you can! Please send a message to docs@gimp.org with blended2 as the subject line. Feel free to also include documentation related suggestions or fix requests. 13.18 Blinds Overview The Blinds filter allows you to remove bands of your image at regular intervals, giving a blinds-like effect.
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CHAPTER 13. FILTERS 113 Time A subset of the Random Seed, Time, will initialize every blurring using the clock of the hardware platform. This ensures better randomization results than using numeric seeds. Randomization% This slider represents how much randomization will take place during the blur. Higher values will lead to more blurring. Repeat The Repeat slider determines how many times the filter will be used on the active layer or selection. A high Repeat value will lead to more blurring. 13.
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CHAPTER 13. FILTERS 114 Fade direction F ade dirdescribes the direction from which the spokes will fade. The actual fading is set in the Brush Options. • In renders the spokes from the outside inwards. • Out renders the spokes from the inside outwards. Spokes The Spokes setting changes the number of spokes that will be used in the render. Inside Pixels The Inside Pixels setting controls the distance from the center of the image from which the spokes will begin rendering.
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CHAPTER 13. FILTERS 13.26 115 Center Guide Overview The Center Guide filter places a horizontal and a vertical guide on your image. Center Guide Options Center Guide Settings Physical This checkbox will place the guides in the exact pixel center of the image. Optical This checkbox will place the guides in the optical center of the image. The optical center differs in that it represents more what the human eye and brain visualize as the center of the image.
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CHAPTER 13. FILTERS 13.29 116 Color Enhance Overview The Color Enhance filter runs an automatic saturation stretch on the three channels in the image. It does so within HSV color space, preserving hue. For each channel in the image, the tool finds the maximum and minimum saturation values and stretches the histograms to the full saturation range. See also Further information can be found in the glossary regarding: HSV and Channels Further histogram information can be found on the Histogram help page.
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CHAPTER 13. FILTERS 117 • The color well can be clicked to launch the color selection dialog. • If a more manual method of color selection is required, there are three sliders available here. Each of these sliders represents one of the three primary colors that are available in the context of the image. 13.31 Colorify Overview The Colorify filter remaps all color pixels in the active selection or layer to a chosen color. It preserves the luminosity of the image.
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CHAPTER 13. FILTERS 13.34 118 Convolution Matrix Our apologies Sorry, but the help page for this item is not written yet. Can I help? Yes, you can! Please send a message to docs@gimp.org with Convolution Matrix as the subject line. Feel free to also include documentation related suggestions or fix requests. 13.35 Cubism Overview The Cubismplug-in modifies the image so that it appears to be constructed of small squares of semitransparent tissue paper.
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CHAPTER 13. FILTERS 13.37 119 Decompose Our apologies Sorry, but the help page for this item is not written yet. Can I help? Yes, you can! Please send a message to docs@gimp.org with Decompose as the subject line. Feel free to also include documentation related suggestions or fix requests. 13.38 Deinterlace Our apologies Sorry, but the help page for this item is not written yet. Can I help? Yes, you can! Please send a message to docs@gimp.org with Deinterlace as the subject line.
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CHAPTER 13. FILTERS 13.43 120 Displace Our apologies Sorry, but the help page for this item is not written yet. Can I help? Yes, you can! Please send a message to docs@gimp.org with displace as the subject line. Feel free to also include documentation related suggestions or fix requests. 13.44 Ditherize Overview The Ditherize filter reduces the number of colors used in an image without changing the image type. An RGB image will remain so, although appear as if indexed.
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CHAPTER 13. FILTERS 13.47 121 Engrave Our apologies Sorry, but the help page for this item is not written yet. Can I help? Yes, you can! Please send a message to docs@gimp.org with engrave as the subject line. Feel free to also include documentation related suggestions or fix requests. 13.48 Fade Alpha Our apologies Sorry, but the help page for this item is not written yet. Can I help? Yes, you can! Please send a message to docs@gimp.org with Fade Alpha as the subject line.
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CHAPTER 13. FILTERS 13.53 122 Flame Overview The F lame filter is a complex rendering tool in the Nature menu. There are many available options which will affect the result. The top left area of the Flame window shows a preview pane. Any changes made to the F lame settings will be displayed here. Flame Options Flame Settings Edit Flame Clicking the Edit Flame button will provide an options window. Displayed are nine versions of the F lame. The center version represents the current flame.
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CHAPTER 13. FILTERS 123 Camera The Camera settings affect the visual rendering of the flame artifact. Z oom changes the visual closeness to the flame. Valid settings are between -4.00 and +4.00. X and Y change the position of the flame on the X and Y axis. 13.54 FlareFX Our apologies Sorry, but the help page for this item is not written yet. Can I help? Yes you can! Please send a message to docs@gimp.org with flarefx as the subject line.
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CHAPTER 13. FILTERS 124 Windows The four W indows checkboxes display or hide the four methods of color modification. These windows are fully interactive. • Clicking Hue will open the Hue Variations window. Within this window are six different hue modification previews. Clicking any of the preview windows will modify the hue of the region with the chosen hue. All preview windows that are open will update dynamically. • Clicking Saturation will open the Saturation Variations window.
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CHAPTER 13. FILTERS 13.58 125 Frame Filter Our apologies Sorry, but the help page for this item is not written yet. Can I help? Yes you can! Please send a message to docs@gimp.org with Frame Filter as the subject line. Feel free to also include documentation related suggestions or fix requests. 13.59 Frame Reshuffle Our apologies Sorry, but the help page for this item is not written yet. Can I help? Yes you can! Please send a message to docs@gimp.org with Frame Reshuffle as the subject line.
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CHAPTER 13. FILTERS 13.62 126 Dynamic Text Tool Our apologies Sorry, but the help page for this item is not written yet. Can I help? Yes you can! Please send a message to docs@gimp.org with gdyntext as the subject line. Feel free to also include documentation related suggestions or fix requests. 13.63 GeeZoom! 13.64 Gfig Overview The Gfig plug-in is a versatile plug-in that is used to create geometric shapes. It makes use of definable paths and the currently selected brush.
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CHAPTER 13. FILTERS 127 Load The Load button is used for loading individual shapes into the editor. If there is a Gfig file located somewhere on the file system, this button is used to load the shape. New Clicking this button will remove all of the current shape settings and create a new shape file. After clicking the New button, a dialog will request a filename for the new shape. Delete Delete is the button used to delete a saved shape.
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CHAPTER 13. FILTERS 128 With BG of This dropdown is available only if the Draw on dropdown has either New or Multiple selected. The available options here change the background setting for the rendered shape. • The Transparent setting renders the shape onto a transparent background. • Background uses the currently selected background color for the shape background. • Foreground uses the currently selected foreground color to render the the background for the shape.
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CHAPTER 13. FILTERS 129 Selections The Select Tab is only made available if Selection is the active option in the Paint tab. Selection Type The Selection Type can be set to one of four things. • Add will merge any existing selection with the shape that will be rendered. If no selection exists, Gfig will create one. • Subtract will take the existing selection area and remove the shape from that area. If no existing selection is present, Gfig will do nothing.
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CHAPTER 13. FILTERS 130 Radius The Radius slider is a subset of the F eather option. The slider sets the amount of feathering that will be created against the selection. A high setting here will result in more feathering. Options The Options Tab sets many of the Gfig options. Show Image The Show Image checkbox toggles whether the current image or layer is shown in the main Preview window. Reload Image Reload Image reloads the active image or layer into the main Preview window.
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CHAPTER 13. FILTERS 131 Tool The circle tool is the second tool in the Ops panel. The circle tool is used to create perfect circles. Circles are created by clicking and dragging the mouse cursor. The initial click point becomes the center of the circle and the drop point sets the radius of the circle. Ellipse Tool The ellipse tool is used to create non-symmetrical circles. The ellipses have either a horizontal or a vertical alignment. Ellipses are created by dragging the mouse cursor.
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CHAPTER 13. FILTERS 132 • Circles and Ellipses can be moved with the center control point. This will however relocate the center control point, but not the radius control point. • The Star shape, when created, contains a third control point located between the center and the radius. This point controls the length of the spokes. Copy Tool The copy tool is used to copy shapes. Click any control point that belongs to the shape that is to be moved and drag the point to a new location.
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CHAPTER 13. FILTERS 13.67 133 Gimpressionist Our apologies Sorry, but the help page for this item is not written yet. Can I help? Yes you can! Please send a message to docs@gimp.org with gimpressionist as the subject line. Feel free to also include documentation related suggestions or fix requests. 13.68 Glass Tile Our apologies Sorry, but the help page for this item is not written yet. Can I help? Yes you can! Please send a message to docs@gimp.org with glasstile as the subject line.
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CHAPTER 13. FILTERS 134 13.69.3 Highlight Edges Overview The Highlight Edges filter will produce a new layer from an old one that replicates a thin shadow and highlight line. 13.70 Gradient Map Overview The Gradient Map filter re-maps the active image colors using the currently selected gradient. The filter parses the color information contained in the image and applies a color replacement using the gradient colors as target colors.
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CHAPTER 13. FILTERS 13.72 135 GIMP Table Magic Overview Allows you to configure settings for saving an image as a formatted HTML table. GIMP Table Magic Options If Generate Full HTML Document is selected, The GIMP will create a full document with,, etc. instead of just producing the code for the table. The Use Cellspan option makes the resulting HTML table use the and tags to merge contiguous cells of the same color into one large cell.
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CHAPTER 13. FILTERS 13.75 136 Guide Grid Overview The Guide Grid filter places a grid arrangement of guides on the image. Guide Grid Options Guide Grid Settings X spacing This option sets the number of pixels between vertical guides. Y spacing This option sets the number of pixels between horizontal guides. X offset This setting adjusts the starting point for the horizontal guides. Y offset This setting adjusts the starting point for the vertical guides.
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CHAPTER 13. FILTERS 13.78 137 Hot Overview The Hot filter scans an image for pixels with RBG values that will give unsafe values of chrominance signal or composite signal amplitude when encoded into an NTSC or PAL color signal. This tends to happen for certain high intensity, high saturation colors that are rare in real scenes, but can be easily found in synthetic images.
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CHAPTER 13. FILTERS 13.82 138 Image Tile Our apologies Sorry, but the help page for this item is not written yet. Can I help? Yes you can! Please send a message to docs@gimp.org with image_tile as the subject line. Feel free to also include documentation related suggestions or fix requests. 13.83 Imagemap Our apologies Sorry, but the help page for this item is not written yet. Can I help? Yes you can! Please send a message to docs@gimp.org with imagemap as the subject line.
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CHAPTER 13. FILTERS 13.86 139 JPEG Overview Allows you to configure settings for saving a JPEG file. JPEG File Options JPEG File Settings Comments You can add a comment to the image up to 32,768 characters (32 KB) by entering text in the Image Comments box. A default comment can be defined in Preferences. Quality The parameter settings allow you to alter the way that the JPEG file is saved to get the best balance between image quality and file size.
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CHAPTER 13. FILTERS 13.87 140 Laplace Our apologies Sorry, but the help page for this item is not written yet. Can I help? Yes you can! Please send a message to docs@gimp.org with Laplace as the subject line. Feel free to also include documentation related suggestions or fix requests. 13.88 Layer Functions Our apologies Sorry, but the help page for this item is not written yet. Can I help? Yes you can! Please send a message to docs@gimp.org with Layer Functions as the subject line.
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CHAPTER 13. FILTERS 141 Filename This input box should contain the name of the file that will be sent. This filename does not have to correspond to an existing file on the filesystem, it is used by UUE NCODE or MIME NCODEto encode the image correctly and for this requires a filename. The filename must also be suffixed by a valid filetype, such as .jpg, or an empty mail will be sent.Required Encapsulation There are two encoding methods available for use with this plugin. MIME or UU ENCODE.
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CHAPTER 13. FILTERS 13.95 142 Maze Overview The Maze filter fills the active selection or layer with a maze. Every square in the maze is accessible from every other, if you can find the right path. There are no loops. Features include a choice of maze generation algorithms (Prim’s Algorithm or depthfirst), tileable mazes, and non-rectangular shaped mazes.
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CHAPTER 13. FILTERS 143 The center of the spin in this case, is the center of the image. Z oom blurring produces a blur that radiates out from the center of the image. The center of the image remains relatively calm, whilst the outer areas become blurred toward the center. This filter option produces a perceived forward movement, into the image. Length is the main setting here, and affects the amount of speed, as it were, toward the center of the image. 13.
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CHAPTER 13. FILTERS 144 Tile Size T ile Size increases or decreases the pixel size of the tile. Smaller settings result in more tiles, and larger settings produce larger tiles. This setting can make significant differences depending on the image size. Tile Height T ile Height adjusts the amount of light that is rendered onto the tile. A higher setting here will result in a more rounded tile. Tile Spacing T ile Spacing settings either widen or shrink the gap between the tiles.
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CHAPTER 13. FILTERS 145 See also Further discussion of noise can be found in the glossary under the Noise entry. 13.103 Not yet written Our apologies Sorry, but the help page for this item is not written yet. Can I help? Yes you can! Please send a message to docs@gimp.org With the name of the filter that produced this message. Feel free to also include documentation related suggestions or fix requests. 13.
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CHAPTER 13. FILTERS 13.108 146 Papertile Our apologies Sorry, but the help page for this item is not written yet. Can I help? Yes you can! Please send a message to docs@gimp.org with papertile as the subject line. Feel free to also include documentation related suggestions or fix requests. 13.109 PAT Overview The PAT file format is used for GIMP patterns. When you save a pattern file, you will be prompted to give a description.
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CHAPTER 13. FILTERS 13.113 147 Plasma Overview The Plasma Renderer plugin is a natural cloud generator. The results of a plasma render, can be both pleasing, and useful for all digital artists. The cloud is rendered using two configurable settings. Plasma Cloud Options Plasma Cloud Settings Random Seed Random Seed gives control over the apparent randomness of the cloud. If the Time button is clicked, the random seed is generated using the system time as the base for the randomization algorithm.
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CHAPTER 13. FILTERS 148 Save gamma This adds a gAMA chunk to your PNG file which reflects the current Gamma factor for your display (set globally for GIMP). Viewers with a different display can compensate to ensure the image doesn’t look too dark or too bright. Adding this chunk increases file size slightly.
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CHAPTER 13. FILTERS 13.
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CHAPTER 13. FILTERS 150 The main window is divided into five panes: Preview The Preview pane contains a positioning widget that allows interactive positioning of the output on the page. It contains an outer border, representing the sheet of paper; an inner border, representing the printable area of the printer; an arrow, pointing to the top of the page (the end that is fed into the printer); and a black rectangle, representing the position of the image on the page.
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CHAPTER 13. FILTERS 151 To its right is a button group that allows choosing English (inch) units or metric (centimeter) units. Below these are four boxes that allow entry of the left, top, right, and bottom of the image. These positions are relative to the top left of the paper3 . There are two additional boxes that allow specification of the right margin and bottom margin if you prefer; these are relative to the bottom right corner of the paper. Any of these may have values entered into them.
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CHAPTER 13. FILTERS 152 • Save Settings – immediately save the settings, and continue working in the Print plugin. • Print – immediately print the image (or, if the File printer is chosen, display a file selection window to pick the output file), but do not save settings. • Cancel – immediately quits without saving or printing. Adjust Color The Adjust Color button pops up a non-modal dialog that allows adjustment of various parameters related to the print quality.
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CHAPTER 13. FILTERS 153 settings of the image. This enables you to get an idea of how the image will print out as you adjust settings. Below that there are eight sliders: Brightness (0-2.0, default 1.0) adjust the brightness of the image. Contrast (0-4.0, default 1.0) adjust the output contrast. Cyan, Magenta, Yellow (0-4.0, default 1.0) adjust the cyan, magenta, and yellow in the output.
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CHAPTER 13. FILTERS 154 and vertical lines, this may actually yield the best results. For other types of images, the quality will be poor. • Adaptive Random is similar to Adaptive Hybrid, except that the modifications to the Floyd-Steinberg algorithm are slightly different. This is slower than Adaptive Hybrid on most systems. For some images the quality may be better, but generally Adaptive Hybrid should yield slightly superior images.
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CHAPTER 13. FILTERS 13.121 155 Qbist works best by repeatedly clicking any of the various preview buttons until a desirable effect is observed. Being run largely on random outputs based on random inputs, it tends to be not so useful if the user advances with some strategy. It seems better to simply request new renders repeatedly until the user sees something attractive.
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CHAPTER 13. FILTERS 156 As discussed previously, the Main tab provides tools for the selection of color ranges. The top half of the tab is dedicated to the selection of colors to alter. Conversely the lower half of the tab is where color ranges are selected that will be used to replace the range selected above. From Overview The upper half of the Main tab contains a color wheel, selection manipulation buttons, and manual angle selection entry fields.
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CHAPTER 13. FILTERS 157 • Area: The three options here alter what is shown in the preview area. – Entire Image: This option will display the entire image in the preview area. – Selection: This option will display zoom the preview area such that any currently selected areas will fill the preview area. – Context: Units The units of measurement can be selected here. 13.
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CHAPTER 13. FILTERS 158 Orientation Defines which way the ripples occur. Either horizontal or vertical. Edges When applying a ripple effect, the tool performs the distortion within the confines of the selection so there will be small areas at one edge of the selection which are missing. Selecting Black fills in these area with solid black, Smear will fill this area with pixels stretched to fill, and Wrap fills the blank area with the pixels that were lost from the other side of the image.
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CHAPTER 13. FILTERS 159 Destination The Destination settings affect the active, or working image. The Destination dropdown includes any open images that can be used as a destination image for the color transformation. All of the color replacements can be affected by the In Level slider. Sample The Sample settings affect the method by which the sample colors are chosen. The sample colors can be derived from either an image or a gradient, which is accessible from the Sample dropdown.
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CHAPTER 13. FILTERS 160 Blur Radius The Blur Radius setting affects the maximum number of pixels considered for blurring. The higher the setting, the higher the number of pixels that will be included in the region analysis. Be aware that a higher setting will take considerably longer to compute. Max Delta The Max Delta slider affects the level of detail that will be blurred. A higher setting here will produce more smoothing of the pixels in the radius.
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CHAPTER 13. FILTERS 13.136 161 Sharpen Overview The “Sharpen” Filter attempts to focus images. The amount of sharpness can be chosen. Higher values will lead to more sharpening. This filter can be very useful for enhancing photos. Of note, however, is that the filter will accentuate any noise or blemishes. 13.137 Shift Overview The “Shift” Filter displaces pixels a random amount in the specified direction. Either horizontally or vertically.
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CHAPTER 13. FILTERS 13.141 162 Solid Noise Overview The Solid Noise filter renders a greyscale noise layer. This layer has many useful settings, that can be adjusted to suit varied applications. Solid Noise Settings Solid Noise Settings Random Seed The Random Seed input allows control over the random base number that is used for the render. Time should be used for the most effective random setting. Detail Detail sets the level of aggressiveness for the noise that will be rendered.
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CHAPTER 13. FILTERS 163 • The unit that defines the distance that pixels will be moved is set using the dropdown list. By default it is set to Px or pixels. 13.144 Stampify Overview Stampify renders the current image as a postage stamp. The filter provides the semi-circles around the edge that represent the torn perforation holes found in stamps.
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CHAPTER 13. FILTERS 164 area in black, leaving the text string as the only immediately visible artifact. Terral Text Options Terral Text Settings Solid noise Choosing Solid noise will render the text using soft solid noise shapes. Choosing current picture, on the other hand, will render the bumpmap onto the current layer. Font name The F ont name button selects the font that will be rendered by the filter. Choosing an appropriate font size is important.
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CHAPTER 13. FILTERS 13.150 165 Threshold Alpha Our apologies Sorry, but the help page for this item is not written yet. Can I help? Yes you can! Please send a message to docs@gimp.org with Threshold Alpha as the subject line. Feel free to also include documentation related suggestions or fix requests. 13.151 TIFF Overview Allows you to configure settings for saving a TIFF (Tagged Image File Format) image. TIFF files can be compressed in a number of ways to reduce the file size.
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CHAPTER 13. FILTERS 166 The T ileable Blur filter can be utilized to blur already tileable images so that the tileable properties of the layer are not lost after blurring. Tileable Blur Options Tileable Blur Settings Radius The Radius slider sets the radius of the blur in the same fashion as the Gaussian Blur IIR, or the Gaussian Blur RLE filters. Blur Vertically This option sets the blur to work on the vertical axis. Blur Horizontal This option sets the blur to work on the horizontal axis.
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CHAPTER 13. FILTERS 13.158 167 URL Overview T HE GIMP can load an image directly from an HTTP or FTP server. The image can be in any of the formats that T HE GIMP recognizes. To open the file, simply type the full URL (Uniform Resource Locator) as the selection, e.g. http://www.gimp.org/wilber.jpg. You can either specify the file type as URL or Automatic, and click OK. T HE GIMP will display its progress as it downloads the image to a temporary directory. 13.
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CHAPTER 13. FILTERS 13.164 168 Warp Our apologies Sorry, but the help page for this item is not written yet. Can I help? Yes you can! Please send a message to docs@gimp.org with warp as the subject line. Feel free to also include documentation related suggestions or fix requests. 13.165 Waves Our apologies Sorry, but the help page for this item is not written yet. Can I help? Yes you can! Please send a message to docs@gimp.org with waves as the subject line.
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CHAPTER 13. FILTERS 13.170 169 WMF Overview T HE GIMP can read files in the WMF (Windows Meta File) format. This format is often used for stock images (clip-art) for office applications on the M ICROSOFT W IN DOWS platform. Although WMF is a vector format, GIMP rasterizes (converts to pixels) the image when the file is loaded. 13.171 Xach Blocks Our apologies Sorry, but the help page for this item is not written yet. Can I help? Yes you can! Please send a message to docs@gimp.
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CHAPTER 13. FILTERS 13.175 170 Zealous Crop Our apologies Sorry, but the help page for this item is not written yet. Can I help? Yes you can! Please send a message to docs@gimp.org with Zealous Crop as the subject line. Feel free to also include documentation related suggestions or fix requests. 13.176 (GAP) Animation Filter Our apologies Sorry, but the help page for this item is not written yet. Can I help? Yes you can! Please send a message to docs@gimp.
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CHAPTER14 Keyboard Shortcuts Keyboard shortcuts provide a fast way to access menu items in GIMP. These are the default keyboard shortcuts - you can change them by highlighting a menu item (hovering the cursor over it) and pressing the desired key combination. On some keyboards, the "Alt" key may be called the "Meta" key.
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CHAPTER 14.
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CHAPTER 14. KEYBOARD SHORTCUTS 173 Edit Menu Function Clear Copy Copy Named Cut Cut Named Fill with Foreground Color Fill with Background Color Paste Paste Named Redo Undo Shortcut Ctrl K Ctrl C Ctrl Shift X Ctrl Ctrl Shift Ctrl , Ctrl .
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CHAPTER 14.
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CHAPTER15 Command Line Options 15.1 GIMP When you launch GIMP, it will often be from a graphical menu where you simply click on the GIMP entry. This usually launches GIMP in its default form without any images loaded. If you launch GIMP from a console, or edit the command used to launch it from the menu, you can pass several options to it. These are in the format: gimpoptionsfiles ... GIMP Options -h -help Displays a list of available options, and gives a terse description of each one.
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CHAPTER 15. COMMAND LINE OPTIONS 176 -no-splash-image Do not show the splash screen image as part of the splash screen. Only shows text information in the splash screen. The progress indicator is still visible. This decreases GIMP’s load time. -no-shm Do not use shared memory between GIMP and its plug-ins. Instead of using shared memory, GIMP will send data via pipe. This will result in slower performance than using shared memory. -no-xshm Do not use the X Shared Memory extension.
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CHAPTER 15. COMMAND LINE OPTIONS 177 -libdir Prints the libdir used to install GIMP. -infodir Prints the infodir used to install GIMP. -mandir Prints the mandir used to install GIMP man (manual) pages. -includedir Prints the includedir used to install GIMP. -gimpdatadir Prints the actual directory where GIMP data files, such as patterns and brushes, were installed. -plugindir Prints the actual directory where GIMP plug-ins were installed. -buildplug-in.c Compile and link plug-in.c into a GIMP plug-in.
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CHAPTER 15. COMMAND LINE OPTIONS 178 -libs Print the linker flags that are necessary to link a GIMP plug-in. -libs-noui Print the linker flags that are necessary to link a GIMP plug-in which doesn’t require the GTK+ libraries. -cflags Print the compiler flags that are necessary to link a GIMP plug-in. -cflags-noui Print the compiler flags that are necessary to link a GIMP plug-in which doesn’t require the GTK+ libraries.
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CHAPTER16 GIMP License GNU GENERAL PUBLIC LICENSE Version 2, June 1991 Copyright (C) 1989, 1991 Free Software Foundation, Inc. Temple Place, Suite 330, Boston, MA 02111 USA 59 Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. Preamble The licenses for most software are designed to take away your freedom to share and change it.
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CHAPTER 16. GIMP LICENSE 180 For example, if you distribute copies of such a program, whether gratis or for a fee, you must give the recipients all the rights that you have. You must make sure that they, too, receive or can get the source code. And you must show them these terms so they know their rights. We protect your rights with two steps: (1) copyright the software, and (2) offer you this license which gives you legal permission to copy, distribute and/or modify the software.
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CHAPTER 16. GIMP LICENSE 181 Program does. 1. You may copy and distribute verbatim copies of the Program’s source code as you receive it, in any medium, provided that you conspicuously and appropriately publish on each copy an appropriate copyright notice and disclaimer of warranty; keep intact all the notices that refer to this License and to the absence of any warranty; and give any other recipients of the Program a copy of this License along with the Program.
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CHAPTER 16. GIMP LICENSE 182 whose permissions for other licensees extend to the entire whole, and thus to each and every part regardless of who wrote it. Thus, it is not the intent of this section to claim rights or contest your rights to work written entirely by you; rather, the intent is to exercise the right to control the distribution of derivative or collective works based on the Program.
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CHAPTER 16. GIMP LICENSE 183 If distribution of executable or object code is made by offering access to copy from a designated place, then offering equivalent access to copy the source code from the same place counts as distribution of the source code, even though third parties are not compelled to copy the source along with the object code. 4. You may not copy, modify, sublicense, or distribute the Program except as expressly provided under this License.
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CHAPTER 16. GIMP LICENSE 184 under any particular circumstance, the balance of the section is intended to apply and the section as a whole is intended to apply in other circumstances. It is not the purpose of this section to induce you to infringe any patents or other property right claims or to contest validity of any such claims; this section has the sole purpose of protecting the integrity of the free software distribution system, which is implemented by public license practices.
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CHAPTER 16. GIMP LICENSE 185 status of all derivatives of our free software and of promoting the sharing and reuse of software generally. NO WARRANTY 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.
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CHAPTER 16. GIMP LICENSE 186 This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc.
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CHAPTER17 Glossary A Alpha Refers to transparency. An Alpha Channel allows transparency control. Certain image formats may only contain a single Alpha Channel allowing a transparency of on or off. Other formats allow a variable level of transparency. Anti Aliasing A technique used to make diagonal or curved edges appear smoother by setting pixels near the edge to intermediate colors according to where the edge crosses the underlying color.
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CHAPTER 17. GLOSSARY 188 can utilize the Floyd-Steinberg dithering technique, for example. This dithering method is simply put, a mathematical way of clustering the pixels to accomplish better results than other dithering methods. Of course, there are always exceptions and there are many different dithering models that are in use today. F File Format A way that an image is written. You should select a file format which is suitable for your situation. JPEG and PostScript are examples of file formats.
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CHAPTER 17. GLOSSARY 189 posited with the active layer. The two images above were created using a brush with spacing set to sixty. The image on the left shows non-incremental painting and the image on the right shows the difference that incremental painting can produce. Incremental paint mode results in each brush application, through the duration of a stroke, being rendered in addition to any previous brush renderings. M Marching Ants The name for the dotted line which delineates a selection.
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CHAPTER 17. GLOSSARY 190 Divide The image on the left illustrates a normal layer mode and the image on the right shows the same two layers in divide mode. Screen The image on the left illustrates a normal layer mode and the image on the right shows the same two layers in screen mode. Overlay The image on the left illustrates a normal layer mode and the image on the right shows the same two layers in overlay mode.
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CHAPTER 17. GLOSSARY 191 The image on the left illustrates a normal layer mode and the image on the right shows the same two layers in subtract mode. Darken Only The image on the left illustrates a normal layer mode and the image on the right shows the same two layers in darken mode. Lighten Only The image on the left illustrates a normal layer mode and the image on the right shows the same two layers in lighten mode.
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CHAPTER 17. GLOSSARY 192 Value The image on the left illustrates a normal layer mode and the image on the right shows the same two layers in value mode. N Noise Noise refers to image noise. This is most commonly, a visual representation of audial white noise. A common place that noise is found in visual format is television sets that are not receiving signal. It is considered to be a random collection of pixels of certain colors.
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CHAPTER 17. GLOSSARY 193 X XCF The native file format used by GIMP. XCF is an acronym for the eXperimental Computing Facility which is located at the University of California at Berkeley where T HE GIMP was originally written. The XCF file format supports the storage of many GIMP features, such as Layers, Alpha, and Guides.
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Index Clone, 50 Close, 74 Color Balance, 50 Color Exchange, 105 Color Palette, 89 Color Picker, 51 Color Selector, 94, 95 Color Transform Tools, 68 Context Help, 14 Convert to Grayscale, 23 Convert to Indexed, 23 Convolver, 51 Copy, 17, 18 Copy Gradient, 88 Copy Named, 18 Copy Path, 42 Crop, 52 Cubism, 107 Curves, 53 Cut, 17 Cut Named, 18 LUT operations, 25 About, 14 Add Alpha Channel, 35 Add Dust, 96 Add Layer Mask, 34 Adjust FG-BG, 97 Airbrush, 44 Alien Map, 98 Alien Map 2, 97 Alpha Channel, 35 Alpha To
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INDEX Duplicate Channel, 37 Duplicate Layer, 32 Duplicate Path, 41 Edit Channel Attributes, 38 Edit Layer Attributes, 35 Edit Path Attributes, 43 Edit Qmask Attributes, 95 Elliptical Selection, 55 Environment Settings, 83 Equalize, 25 Eraser, 56 Error Console, 94 Export Path, 43 Feather Selection, 20 File, 72, 93 File Formats, 9 Fill, 19 Filters, 96 First Time, 7 Fit Text, 110 FITS, 110 Flame, 111 Flatten Image, 34 Flip, 56 Float Selection, 19 Free-Hand Selection, 57 Fuzzy Selection, 58 Gfig, 115 GIMP, 3 GI
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INDEX New Path, 41 New View, 22 Offset, 25 Oilify, 134 Open, 76 Open by Extension, 76 Open File, 73 Operations with selections, 18 Paint Tools, 68 Paintbrush, 63 Palette, 90 Palette Editor, 90 Paste, 17 Paste As New, 17 Paste Into, 17 Paste Named, 18 Paste Path, 42 PAT, 135 Path to Selection, 41 Paths, 39, 45 Paths Dialog, 39 Pattern Selection, 89 Patterns, 89 Pencil, 65 Perspective, 71 Pixelize, 135 Plasma, 136 Plug-Ins, 96 PNG, 136 PNM, 137 Posterize, 66 Preferences Dialog, 78 Print, 138 PSP, 143 Qbist, 1
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INDEX Undo History, 94 Using Layers, 29 View operations, 21 Watercolor Color Selector, 95 What are Layers?, 28 Why GIMP, 4 Zoom, 21 197