7.0

Table Of Contents
Guideline: Use a fit setting of Constant resolution and downsample images as necessary to
achieve the size of image you want at the resolution you set for that type of image in
the Document dialog box.
For example, consider the case where the document executes on a 600 DPI printer.
You set the color image resolution to 200 DPI. You have a color image with pixel
dimensions of 600x600. At Constant resolution it occupies a 3-inch x 3-inch area on
the page. You want it to occupy a 1-inch by 1-inch space on the page. Rather than
adjust the fit setting and resize the picture object, you downsample the image to
pixel dimensions of 200x200.
An exception to this guideline is in the case of a line art image. Line art images
should ideally be at the resolution of the printer. Thus if the printer resolution is 600
DPI, you should set the resolution of the line art image to 600 DPI, and, if necessary,
use a fit setting that causes the image to resize with the picture object.
Applies to: Bitmapped images only
Recall that resolution settings apply to both bitmapped images, and PDF and EPS
images. In the case of bitmapped images, they control the size of the image on the
printed page when the fit setting for the picture object is set to Constant resolution.
In the case of PDF and EPS images, they set the maximum resolution for each of the
bitmapped images in the file. The guideline here does not apply to embedded
bitmapped images.
Advantage: Reduces the file size and consequently the amount of processing the image requires
at runtime. Downsampling eliminates unnecessary pixels.
How to apply
it to static
images, and
dynamic
images that
reference
image
resources:
You edit the image resource by selecting it and then using the options in the Object
Inspector. You adjust the Height and Width properties of the image resource, or
launch an image editor from within the Object Inspector, and adjust the pixel
dimensions of the image using the image editor.
How to apply
it to dynamic
images that
reference
external
images:
You adjust the pixel dimensions of any bitmapped external images you place in a
folder, using an external image editor.
If you use the Image Downloader to download the images to the printer or the local
PlanetPress Design Suite virtual disk, you must adjust the pixel dimensions of the
images using an external image editor prior to downloading them.
13.14.5 Color Depth
What does color depth mean?
Color depth refers to the number of colors each individual pixel in a bitmapped image can display. Color depth
is expressed in bits per pixel where each individual bit can take on one of two values (0 or 1).
Related topics:
Static and Dynamic Images (Page 168)
Supported Image Formats (Page 169)
Image Formats: Bitmapped, Vector, and Metafile Formats (Page 171)
Resolution (Page 172)
Pixel Dimensions (Page 175)
Image Quality (Page 176)
Scanline Orientation (Page 352)
Image Size on the Document Page (Page 179)
PlanetPress Talk Expressions for Dynamic Images that Reference Image Resources (Page 180)
Adding Images - Optimization
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