ScanGear CS-U 5.
Top Page Glossary Contents Index Copyright Notice ©1999 Canon Inc. This manual is copyrighted with all rights reserved. Under the copyright laws, this manual may not be copied, in whole or in part, without written consent of Canon Inc. Under the law, copying includes translating into another language or format. Microsoft and Windows are registered trademarks of the Microsoft Corporation in the United States and other countries. Canon, and CanoScan are registered trademarks of Canon, Inc.
Top Page Glossary Contents Chapter 1 Before You Begin Welcome to ScanGear CS-U 5.3 ....................................... 6 Getting Help in ScanGear CS ........................................... 8 Index Chapter 2 Scanning an Original Preparing the Scanner ................................................... 10 Specifying Preview Opening Setting ......................................................... 11 Selecting the TWAIN Source ..........................................
Top Page Glossary Contents Index Chapter 5 What is on the ScanGear CS Main Window? The Toolbar ..................................................................... 38 The Main Sheet .............................................................. 41 The Main Sheet ............................................................... 41 Custom Resolution Dialog Box ....................................... 45 The Tone Sheet ............................................................... 47 Auto Tone Sheet ..........
chapter 1 Top Page Glossary Contents Index Before You Begin Welcome to ScanGear CS-U 5.
chapter 1 Before You Begin Top Page Glossary Contents Welcome to ScanGear CS-U 5.3 Index Welcome to Canon ScanGear CS-U 5.3 software for Windows 98. ScanGear CS-U 5.3 (hereafter referred to ScanGear CS) will provide flexible, efficient image enhancement tools for scanning with your CanoScan FB630U/FB636U Scanner by providing an interface with a wide variety of TWAIN-compliant software applications. ScanGear CS has a number of powerful features that help you achieve peak performance with your scanner.
chapter 1 Before You Begin Top Page Glossary Contents Index • ScanGear CS can run with or without its main window, depending on the acquiring application. Normally when you start a scanning job, you will see the ScanGear CS main window with its toolbar, Preview Area, and tabs. However, some software applications may not open the ScanGear CS main window.
chapter 1 Before You Begin Top Page Glossary Contents Getting Help in ScanGear CS Index For information on using ScanGear CS, open the on-line Help by clicking the Help button on the toolbar or on the dialog boxes. For general questions about scanning, check the Table of Contents or Index to see if the topic you are looking for is covered elsewhere in this user’s guide.
chapter 2 Top Page Glossary Contents Index Scanning an Original Preparing the Scanner Specifying Preview Opening Setting Selecting the TWAIN Source Previewing and Scanning an Original Selecting the Scanning Area 1-9
chapter 2 Scanning an Original Top Page Glossary Contents This is a quick overview of executing a scanning job. For more information about detailed ScanGear CS settings, see Chapter 4 and Chapter 5. Index Preparing the Scanner Follow these simple guidelines to prepare for a scanning job: • Before you start scanning, make sure the scanner is connected correctly. • Always position the original on the scanner platen with the image side down.
chapter 2 Scanning an Original Top Page Glossary Contents Index Specifying Preview Opening Setting The preview opening setting determines what you see in the Preview Area of the ScanGear CS main window when you launch ScanGear CS from the parent software application. What you will see every time you start ScanGear CS depends on how the preview opening setting has been adjusted in the Preferences sheet. 1. On the Windows desktop click the Start button, point to Settings, and click Control Panel. 2.
chapter 2 Scanning an Original Top Page Glossary Contents Index If you want to preview the original on the scanner platen automatically when ScanGear CS is launched from the parent software application, click the button for “Automatically execute a preview”. -orIf you want to display the image displayed in the Preview Area when ScanGear CS was closed at the end of the previous session, click the button for “Saved preview image will be displayed”.
chapter 2 Scanning an Original Top Page Glossary Contents Index Selecting the TWAIN Source Follow this simple procedure to select the CanoScan FB630U/ FB636U as the scanner source. Note This is a very general description of this procedure. The procedure for your software application may be slightly different. For details, refer to your software application manual. 1. Start the software application you are going to use for scanning. 2.
chapter 2 Scanning an Original Top Page Glossary Contents Index Previewing and Scanning an Original 1. Place the original on the scanner platen. For details about positioning the original on the scanner platen, see Quick Start Guide. Note 2. Start the software application you are going to use to start the scanning job. 3. Confirm that your scanner is selected in the Select Source (or its equivalent) dialog box, if needed. For details, see the previous section. 4. Start the scanning job.
chapter 2 Scanning an Original Top Page Glossary Contents Index Note 5. If you see an image in the Preview Area, this means one of the preview settings has been switched on with the Preferences sheet. Otherwise, the Preview Area is empty. (F30) On the Main sheet, adjust the settings for the Scan Mode, Scan Resolution, and size (Selection).
chapter 2 Scanning an Original Top Page Glossary 6. Contents Click the Preview button to pre-scan the image and display it in the Preview Area. Index Note 7. With the image in the Preview Area, you can use the ScanGear CS toolbar and the sheets to manipulate or enhance the image before you actually scan it and send it to the parent software application. In the Preview Area, adjust the image, or select the area to scan with the Crop button or the Auto Crop button.
chapter 2 Scanning an Original Top Page Glossary 8. Contents Index 9. Adjust the image quality with the tools and options provided on the sheets: • Tone sheet. Allows you to adjust the quality of the image. • FB630U/FB636U Scanner sheet. Allows you to set the Threshold and Descreen settings. When you are satisfied with the settings, click the Scan button to scan the image. The image is acquired in the software application.
chapter 2 Scanning an Original Top Page Glossary Contents Index Selecting the Scanning Area Follow this procedure to use the Crop and/or Auto Crop buttons to select an area of the image in the Preview Area for scanning. 1. In the ScanGear CS main window, click the Preview button to display the image on the platen in the Preview Area. 2. With an image in the Preview Area click on the Crop button. 3. Point to one corner of the area of the image that you want to scan. 4.
chapter 2 Scanning an Original Top Page Glossary Contents 7. Click the Scan button to scan the image and send it to the parent software application. Index • You can also use the Selection features on the Main sheet to set the scanning area precisely by entering the dimensions in the entry boxes. • You can set the scanning area with the Crop button or the Selection settings on the Main sheet with or without an image in the Preview Area.
chapter 3 Top Page Glossary Contents Index Settings in the Windows Control Panel Preferences Settings Events Setting 1-20
chapter 3 Settings in the Windows Control Panel Top Page Glossary Contents Preferences Settings Index Displaying the Preferences Sheet The Preferences sheet contains settings for important features that you can switch on and off. The Preferences sheet must be opened from the Control Panel; it cannot be opened from within the parent software application. To open the Preferences sheet 1. On the Windows desktop click the Start button, point to Settings, and click Control Panel. 2.
chapter 3 Settings in the Windows Control Panel Top Page Glossary Contents 4. In the Properties window, click the Preferences tab to open the Preferences sheet. Index For a detailed description of Preferences sheet settings, see the following sections.
chapter 3 Settings in the Windows Control Panel Top Page Glossary Windowless Mode Settings Contents Setting scanning for high-definition color Index Click the checkbox for “Use High Definition Color instead of Color” to scan in high-definition color mode with a parent software application that will not open the ScanGear CS main window.
chapter 3 Settings in the Windows Control Panel Top Page Glossary Preview Opening Settings Contents Switching automatic preview on for ScanGear CS launching Index Click the button for “Automatically execute a preview” to preview the original on the scanner platen automatically when ScanGear CS is launched from the parent software application.
chapter 3 Settings in the Windows Control Panel Top Page Glossary Contents Events Setting Index Selecting an Application for Starting Up with the Start Button The events setting on the Events sheet determines which parent application starts automatically when the Start Button on the scanner is pressed. 1. On the Windows desktop click the Start button, point to Settings, and click Control Panel. 2. In the Control Panel window, double-click the Scanners and Cameras icon. 3.
chapter 3 Settings in the Windows Control Panel Top Page Glossary Contents 4. In the Properties window, click the Events tab to open the Events sheet. Index Note The list of all push-enabled applications (applications designed for scanners with the push button) registered in your system will appear in the Events window.
chapter 3 Settings in the Windows Control Panel Top Page Glossary Contents Index 5. In the list, click the name of the application that you want start automatically every time you press the Push Button on the scanner. If other applications are selected, click their checkboxes to de-select them. Note If several applications are selected on the Events sheet, every time you press the Push Button on the scanner, you must select the parent application that you want to start.
chapter 4 Top Page Glossary Contents Index The ScanGear CS Settings Overview of the Main Window Summary of the ScanGear CS Settings 1-28
chapter 4 The ScanGear CS Settings Top Page Glossary Contents Overview of the Main Window Index 1 2 4 3 5 Toolbar Use the Toolbar to manipulate the image in the Preview Area and modify the scan settings. 1 Scanning Buttons Click the Preview button to pre-scan the image and display it in the Preview Area so you can select the scanning area, manipulate the image, or enhance the image with special effects.
chapter 4 The ScanGear CS Settings Top Page Glossary Contents Click the Clear button to clear the image in the Preview Area. Clicking the Clear Button also cancels any scanning settings you have performed on the image. Index Preview Area Displays the preview image. Use the Preview Area to set the scanning area and adjust the image before scanning. 3 • You can view the preview image and decide if the image needs any adjustments before you actually scan the image.
chapter 4 The ScanGear CS Settings Top Page Glossary Contents Index The Tabs and Sheets Click the Main tab, Tone tab, or the Scanner tab to open the Main sheet, Tone sheet, or Scanner sheet. Use the settings on each sheet to perform important settings for scanning. 4 The name of your scanner (FB630U or FB636U) will appear on the Scanner tab.
chapter 4 The ScanGear CS Settings Top Page Glossary Contents Index Summary of the ScanGear CS Settings General Scanning Settings The general scanning settings set up the basic features for the scanning job. 3 5 1 2 4 The general scanning settings are performed in the ScanGear CS main window.
chapter 4 The ScanGear CS Settings Top Page Glossary Contents Index Selecting the Scan Mode On the Main sheet click the down-arrow for Scan Mode and select Black and White, Grayscale, Color, High Definition Color, or Text Enhanced. (F41) 1 Selecting scanning resolution On the Main sheet click the down-arrow for Scan Resolution and select the resolution setting from the pull-down list. If you select Custom for the Scan Resolution setting, you can specify custom resolution settings.
chapter 4 The ScanGear CS Settings Top Page Glossary Image Manipulation Settings Contents Index These settings allow you to crop, size, or change the position of the image for scanning. Cropping an image Click the Crop button in the toolbar and drag the pointer to draw a rectangle around the area of the image you want to crop. You can use the Auto Crop button to size the rectangle exactly around the object enclosed by the rectangle.
chapter 4 The ScanGear CS Settings Top Page Glossary Contents Rotating an image Click the Rotate Left or Rotate Right button in the toolbar to rotate the image left or right 90 degrees. (F40) Index Image Enhancement Settings The enhancement settings provide a range of professional tools for adjusting color and tone for scanning. Adjusting color tone automatically On the Preview Area toolbar or the Tone sheet, click the Auto Tone button to have ScanGear CS correct color tones automatically.
chapter 4 The ScanGear CS Settings Top Page Glossary Contents Index Adjusting output color (RGB) On the Tone sheet, click the Special Tone Curves button. Then on the graph, click a point on the curve to define a point and drag it in any direction to adjust the color output of the color selected in the Channel box. (F54) Setting Threshold On the Main sheet, click the down-arrow for Scan Mode and select Black and White from the pull-down list.
chapter 5 Top Page Glossary Contents Index What is on the ScanGear CS Main Window? The Toolbar The Main Sheet The Tone Sheet The Scanner Sheet 1-37
chapter 5 What is on the ScanGear CS Main Window? Top Page Glossary Contents Index The Toolbar Buttons on the toolbar help you to perform important tasks, like cropping images, moving images, zooming, and so on. Crop Button Click the Crop button and drag the pointer in any direction to draw a rectangle around the area you want to select for scanning. This reduces the time it takes to scan an image because you are pre-scanning or scanning only the necessary section of the original, not the whole area.
chapter 5 What is on the ScanGear CS Main Window? Top Page Glossary Contents Index Zoom Tool Button Click the Zoom Tool button and then click the left or right mouse button to increase or decrease the current magnification of the image. The final scanned image will not be affected by this operation. To increase the magnification of the image, click the Zoom Tool button then click the left mouse button on the area of the previewed image to view.
chapter 5 What is on the ScanGear CS Main Window? Top Page Glossary Contents Index Rotate Left Button Click the Rotate Left button to rotate a scanned image left 90 degrees (counterclockwise). Click this button repeatedly to continue rotating the image left. Rotate Right Button Click the Rotate Right button to rotate a scanned image right 90 degrees (clockwise). Click this button repeatedly to continue rotating the image right.
chapter 5 What is on the ScanGear CS Main Window? Top Page Glossary Contents The Main Sheet Index The Main Sheet Scan Mode The Scan Mode determines how the original will be scanned: Black and White, Grayscale, Color, etc.
chapter 5 What is on the ScanGear CS Main Window? Top Page Glossary Contents Click the down-arrow and select a setting from the pull-down list. Index Note Changing the Scan Mode will refresh the image in the Preview Area and cancel the settings you made for the preview image. • Black and White. The image is scanned in black and white. • Grayscale. The image is scanned in shades of gray. • Color. The image is scanned in color. • High Definition Color. Select for the best possible color quality.
chapter 5 What is on the ScanGear CS Main Window? Top Page Glossary Contents Note Index Notations are provided to help you decide which resolution setting to select. If you are scanning the original for display on a screen (not printing) select Screen 75 dpi. The higher the resolution, the better the quality of the displayed image but the slower the scanning speed and larger the resulting file size. Make sure you select a setting based on the capability of your output device.
chapter 5 What is on the ScanGear CS Main Window? Top Page Glossary • Units. Click the down-arrow and select a unit to measure the scanning area. Changing the Units setting does not affect the image in the Preview Area. • Width and Height. The width and height of the current selection, or if there is no selection, the maximum output size, measured from the upper left corner of the image in the Preview Area and based on the current paper size.
chapter 5 What is on the ScanGear CS Main Window? Top Page Glossary Custom Resolution Dialog Box Contents Index ScanGear CS has a range of preset resolutions based on your chosen output device. With the Custom Resolutions dialog box, you can also create a new customized resolution, change, or delete a previously defined custom resolution. To create a custom resolution setting Follow this procedure to create a new resolution setting. 1.
chapter 5 What is on the ScanGear CS Main Window? Top Page Glossary To delete a custom resolution setting Contents When you no longer need to use a custom resolution, you can delete it from the list. Index 1. On the Main sheet, click the down-arrow for Scan Resolution and select Custom from the pull-down list. The Custom Resolutions dialog box opens. 2. In the Custom Resolutions dialog box, select a name. 3. Click the Remove button. 4. Click the OK button.
chapter 5 What is on the ScanGear CS Main Window? Top Page Glossary Contents Index The Tone Sheet In the main window click the Tone tab to open the Tone sheet. The Tone sheet contains the buttons that open the professional features for adjusting color tone. 1 2 3 4 5 1 Auto Tone button. Turns on automatic tone adjustment and opens the Auto Tone sheet with the Auto Tone graph. 2 Contrast/Brightness button. Opens the Contrast/ Brightness sheet with the Contrast/Brightness graph. 3 Gamma button.
chapter 5 What is on the ScanGear CS Main Window? Top Page Glossary Auto Tone Sheet Contents Index When the Auto Tone button is depressed, the Auto Tone sheet is displayed with the Auto Tone graph and the automatic tone correction feature switches on. All color tone adjustment is conducted automatically by ScanGear CS to produce a better image. This setting is connected with the Auto Tone button in the toolbar.
chapter 5 What is on the ScanGear CS Main Window? Top Page Glossary Contrast/Brightness Sheet Contents Index When the Contrast/Brightness button is clicked, the Contrast/ Brightness sheet is displayed. The shape of the tone curve changes to reflect the current Contrast/Brightness setting for the current Channel, and the image in the Preview Area changes to reflect the adjustment. Brightness Drag the Brightness slider to the left to darken the image or to the right to lighten the image.
chapter 5 What is on the ScanGear CS Main Window? Top Page Glossary Contents Contrast Drag the Contrast slider to the left to decrease the contrast of the image or to the right to increase the contrast of the image. Index Channel Click the Channel down-arrow and select one of the primary colors (Red, Green, Blue) for adjustment or leave the setting at Master to adjust all colors. Reset Resets the default settings for Contrast and Brightness.
chapter 5 What is on the ScanGear CS Main Window? Top Page Glossary When the Gamma button is clicked, the Gamma sheet is Contents displayed. Index Gamma refers to a process where mid-tones are shifted so that the lighter colors are lightened and darker colors are darkened.
chapter 5 What is on the ScanGear CS Main Window? Top Page Glossary Contents Reset Resets the default gamma setting. Index Histogram Sheet When the Histogram button is clicked, the Histogram sheet is displayed. Use the histogram to enhance an image when the image is either too light or too dark, like an overexposed or underexposed photograph. Increasing the darker tones with the histogram improves the contrast of the image.
chapter 5 What is on the ScanGear CS Main Window? Top Page Glossary Contents Index Eyedroppers (Black-point, Mid-point, White-point) Click one of the three eyedroppers then click the portion of the image in the Preview Area that you want to sample, or enter values in the text boxes, or drag one of the three triangles at the bottom of the graph to adjust the value. The shape of the tone curve and histogram changes to reflect the current Histogram setting for the current Channel.
chapter 5 What is on the ScanGear CS Main Window? Top Page Glossary Special Tone Curves Sheet Contents Index When the Special Tone Curves button is clicked, the Special Tone Curves sheet is displayed. Channel Click the Channel down-arrow and select one of the primary colors (Red, Green, Blue) for adjustment or leave the setting at Master to adjust all colors.
chapter 5 What is on the ScanGear CS Main Window? Top Page Glossary Contents Index Select Special Curve Click the down-arrow and select a setting from the drop-down list.
chapter 5 What is on the ScanGear CS Main Window? Top Page Glossary Editing a Special Tone Curve Directly Contents In the Special Tone Curves graph you can edit the curve directly. Index 1. Click on the curve and drag each curve anchor point until the desired effect is achieved. 2. To remove an anchor point altogether, drag the anchor point off the graph area.
chapter 5 What is on the ScanGear CS Main Window? Top Page Glossary Contents Here are some hints for editing curves: • Curve handles are drawn on a white background as a red dot to signify that they are editable. When the cursor is over the handle, it changes to a crosshair. • Curve end points can be selected and dragged to any point in the curve but cannot be deleted. • Up to 15 points can be added to a curve by clicking anywhere in the curve box.
chapter 5 What is on the ScanGear CS Main Window? Top Page Glossary Contents The Scanner Sheet Index When you click on the FB630U/FB636U Tab, the Scanner sheet opens. Paper Size Click the down-arrow and select a paper size from the drop-down list. These sizes are available: Business Card, Statement, B5, Executive, A4, Letter, Full Platen. Changing the Paper Size will refresh the image in the Preview Area.
chapter 5 What is on the ScanGear CS Main Window? Top Page Glossary Contents Index Threshold Threshold determines whether portions of an original are scanned as black or white. Drag the slider right to make the document lighter or drag it left to make the document darker. You can also enter the values directly into the entry box (range: 0~255). This feature is enabled only when the Scan Mode on the Main sheet has been set for Black and White. Otherwise, this slidebar is dimmed and disabled.
chapter 6 Top Page Glossary Contents Index Troubleshooting Pre-Scan Checklist How to Avoid Problems Troubleshooting 1-60
chapter 6 Troubleshooting Top Page Glossary Contents Index Pre-Scan Checklist Perform the checks on this short list before you begin troubleshooting specific problems. • Refer to the Quick Start Guide to make sure that the ScanGear CS software was installed successfully. • Check that the cables between your computer and scanner are connected securely. • Before scanning or previewing, check that your scanner has been selected as the data source in the application.
chapter 6 Troubleshooting Top Page Glossary Contents Index How to Avoid Problems Here is some general advice on avoiding problems in your scanning jobs: • Start with the best possible original image to scan. • Select only the part of the image you want to scan. Preview the image and select it with the Crop and Auto Crop buttons. (F38, 39) Not only does a more precise selection save file space, but your image quality will be much higher. • Check the output file size before beginning the scan.
chapter 6 Troubleshooting Top Page Glossary Contents • If you are using OCR software, scan in Text Enhanced at 300 dpi or higher. • Take advantage of the preview feature and preview as much as you want before scanning.
chapter 6 Troubleshooting Top Page Glossary Contents Troubleshooting Index The scanner diagnostics test fails. Problem: Cause: Solution: The Scanner Diagnostics test started with the Test Scanner button on the Scanner sheet, returns a Test Failed message. The scan head may not be in its home position. Close the ScanGear CS window if it is open. Colors are not what you expect. Problem: Cause: Solution: The colors in the preview image appear different from the colors in the original image.
chapter 6 Troubleshooting Top Page Glossary Contents Index The printed image colors appear different from image you see in the Preview Area. Problem: Cause: Solution: The colors in the printed image appear different from the colors in the image you see on the screen. Printer toner may be low. ColorGear color matching may have not been selected when it was necessary. Check the toner cartridge in the printer and make sure that it is not low or empty.
chapter 6 Troubleshooting Top Page Glossary ScanGear CS does not launch. Contents Problem: Index Cause: Solution: ScanGear CS does not launch, the screen freezes, or another software application launches. The scanner may not be connected correctly, or you may have chosen the wrong scanner source in your application. The scanner configuration file may have been changed. Make sure the scanner is properly connected to your computer and that the AC adapter is connected to your scanner.
chapter 6 Troubleshooting Top Page Glossary Parts of images are missing or mis-aligned. Contents Problem: Index Cause: Solution: Some characters are missing from the image in the Preview Area, or the image is mis-aligned in the Preview Area. The page has been placed on the scanner improperly. Check the scanner and place the page improperly to adjust the image. Image is too light or too dark compared to the original.
chapter 6 Troubleshooting Top Page Glossary The image I want to scan is too big for the scanner. Contents Problem: Index Solution: The image I want to scan is 50 percent larger than my scanner platen. Scan one half at a time, at exactly the same settings. Then use your imaging application to join the parts. The scanned image has jagged edges. Problem: Cause: Solution: The scanned image has jagged edges when viewed on the screen or printed.
Top Page Glossary Contents Index Glossary 1-69
Glossary Top Page Glossary Contents Acquired Images Images sent from your scanner software to the host graphics application. Index Auto Crop After you select an area of the screen by clicking the Crop button and dragging a rectangle around the object or text you want to crop, click the Auto Crop button to size the rectangle exactly to the size of the object or block of text enclosed in the rectangle.
Glossary Top Page Glossary Contents Index Black-point The darkest portion of an image scanned as Color or Grayscale. When you click on the image with the Black-point eyedropper, all tones darker than the selected sample tone are adjusted to black. See also Mid-point, White-point. Brightness The overall amount of lightness or darkness in an image. An image with maximum brightness tends toward white; an image with minimum brightness tends toward black.
Glossary Top Page Glossary Contents Index Canon ImageTrust Canon’s process of converting grayscale image (8 bits per pixel) to a black and white image (1 bit per pixel) to yield a more effective scan for optical character recognition (OCR) applications. Channel See Color Channels. Clear button The button that removes the current image from the Preview Area. CMY An acronym for cyan, magenta, and yellow, the color complements to red, green, and blue.
Glossary Top Page Glossary Contents Index Color Matching The range of colors your scanner can see may not match the range of colors your video monitor can produce. Color matching lets your system display colors so that the color on your monitor and printer matches the colors scanned. See also Canon ColorGear Color Matching. Complementary colors Red, green, and blue can be thought of as complementary colors to cyan, magenta, and yellow. These colors cancel each other out when combined in equal amounts.
Glossary Top Page Glossary Contents Curve file A file containing Special Tone Curve settings. (Tone sheet-Special Tone Curves) Index Custom curves A user-defined Special Tone Curve that may be saved in a file. (Tone sheet-Special Tone Curves) Custom Resolutions The Custom Resolutions dialog box lets you create a scan resolution not found in the preset list, but supported by the input device. Default The preset factory settings on hardware or software.
Glossary Top Page Glossary Contents Index End points The points at each end of a preset or custom tone curve. The curve end points cannot be deleted. If they are dragged to or past an edge, they remain on the edge. Add points to the curve by clicking anywhere in the curve box. (Tone sheet - Special Tone Curves) Exective A U.S. standard paper size measuring width x height:7.25 x 10.5 in. (184.2 x 266.
Glossary Top Page Glossary Contents Index Grayscale Grayscale refers to a single-channel image made up of 256 shades of gray, ranging from white to black, that represent all tones in an image. Height The Height text box contains the height of the current selection, or, if there is no selection, the maximum vertical output size, based on the currently selected Paper Size. Histogram Tool The Histogram displays the distribution of bright and dark pixels for each color channel in the previewed image.
Glossary Top Page Glossary Contents Low contrast An image that has low contrast does not have many distinct differences between tones. Index Mid-point The midtone portion of the image scanned as Color or Grayscale. When you click on the image with the Mid-point eyedropper, all tones between the black-point and the white-point are adjusted in relation to the mid-point setting. Mid-tone Mid-tones are the middle range of tones in an image, between highlights and shadows.
Glossary Top Page Glossary Contents Index OCR (Optical Character Recognition) OCR (Optical Character Recognition) software converts text images into actual text characters readable by a word-processing program or similar application. The Text Enhanced scan setting sharpens black and white contrast to assist in the accurate recognition of characters in OCR software. Optical resolution A scanner’s resolution capability. See also dpi, Resolution.
Glossary Top Page Glossary Contents Index Pixel An acronym for “picture element,” a pixel is the smallest element used to create a screen image. It can contain up to 24 bits of color information. Platen The scanner’s document glass, where originals are placed for scanning. Preset Curves A set of curves designed to fix common photographic image problems such as underexposure, overexposure, or low contrast.
Glossary Top Page Glossary Contents Index Resolution The degree of detail, translated into the number of pixels or dpi, which a device such as a scanner, video monitor, printer, or other image-displaying device, can display or reproduce. See also dpi, Pixel, Scan Resolution. RGB RGB is an acronym for red, green, and blue, the onscreen color complements to print colors cyan, magenta, and yellow. Rotate Left The Rotate Left tool rotates the preview display 90 degrees counterclockwise.
Glossary Top Page Glossary Contents Index Scan Mode The desired bit depth for the scanned image. Choices are Color, High Definition Color, Black and White, Grayscale, and Text Enhanced. Scanner An input device that scans an original with a light source, and converts the image tones to digital information for computer applications. The digital information can be saved as a file, or converted to a text file using OCR software.
Glossary Top Page Glossary Contents Test Scanner Button The Test Scanner Button on the Scanner sheet starts diagnostic tests and reports if there are any problems with the scanner. Index Text Enhanced A feature used by ScanGear CS to increase the accuracy of text scans. When Text Enhanced is the scan mode, images are scanned as Grayscale (8 bits per pixel) and converted to Black and White (1 bit per pixel) using Canon ImageTrust processing software.
Glossary Top Page Glossary Contents Index Toolbar A set of ScanGear CS tool buttons, located above the Preview Area, for image selection, orientation, and other basic adjustments. TWAIN TWAIN refers to an industry standard for transferring information from devices (such as a scanner or digital camera) to your computer. One interpretation of the acronym is “Technology Without An Interested Name.” Underexposed An dark photographic image that was exposed to too little light when it was photographed.
Glossary Top Page Glossary Contents Index Width The Width text box contains the width of the current selection or, if there is no selection, the maximum horizontal output size, based on the currently selected paper size. Width-Height ratio Proportion of the image. To keep the width-height ratio intact, click the Keep Proportions button before changing the width or height values.
Top Page Glossary Contents Index Index 1-85
Index Top Page Glossary Contents Index Index A E Auto Crop Button, 39 Auto Tone button, 40, 47 Auto Tone Sheet, 48 enhancing image adjusting Brightness, 35 adjusting color tone automatically, 35 adjusting Contrast, 35 adjusting intensity of tones (Histogram), 35 adjusting mid-tones (Gamma), 35 adjusting output color (Special Tone Curve), 36 adjusting threshold, 36 descreen (moire reduction), 36 B Black and White, 42 C Calibration, 59 Clear button, 30 Color, 42 Contrast/Brightness button, 47 Contras
Index Top Page Glossary H N help opening on-line help, 8 Help button, 40 High Definition Color, 42 Histogram button, 47 Histogram sheet, 52 Negative/Positive button, 39 Contents Index M Main sheet Keep Proportions button, 43 Scale, 44 Scan Mode, 41 Scan Resolution, 42 Selection, 43 Units, 44 Width and Height, 44 Main window overview, 29 manipulating image cropping, 34 inverting an image, 34 mirroring an image, 34 moving an image, 34 rotating an image, 35 zooming, 34 Mirror Button, 39 Move Image butto
Index Top Page Glossary R T resolution, 31, 42 setting custom resolution, 45 Rotate Left button, 40 Rotate Right button, 40 rulers, 30 Rulers button, 40 Test Scanner, 59 Text Enhanced, 42 Threshold, 59 Tone sheet Tone buttons, 47 toolbar Auto Crop button, 39 Auto Tone button, 40 Crop button, 38 Help button, 40 Mirror button, 39 Move Image button, 38 Negative/Positive button, 39 Rotate Left button, 40 Rotate Right button, 40 Rulers button, 40 Zoom Tool button, 39 troubleshooting, 64 TWAIN source Select
Index Top Page Glossary W Contents Width and Height, 44 Index Z Zoom Tool button, 39 89
