Adobe 23101335 User Guide - Page 341

Choose Rebuild Color Table from the Color Table, See Controlling optimization ImageReady

Page 341 highlights

ADOBE PHOTOSHOP 6.0 331 User Guide To select a color reduction algorithm: Choose an option from the Color Reduction Algorithm pop-up menu (below the file format menu in the Optimize panel/palette): Perceptual Creates a custom color table by giving priority to colors for which the human eye has greater sensitivity. Selective Creates a color table similar to the Perceptual color table, but favoring broad areas of color and the preservation of Web colors. This color table usually produces images with the greatest color integrity. Selective is the default option. Adaptive Creates a custom color table by sampling colors from the spectrum appearing most commonly in the image. For example, an image with only the colors green and blue produces a color table made primarily of greens and blues. Most images concentrate colors in particular areas of the spectrum. Web Uses the standard 216-color color table common to the Windows and Mac OS 8-bit (256-color) palettes. This option ensures that no browser dither is applied to colors when the image is displayed using 8-bit color. (This palette is also called the Web-safe palette.) If your image has fewer colors than the total number specified in the color palette, unused colors are removed. Using the Web palette can create larger files, and is recommended only when avoiding browser dither is a high priority. See "Previewing and controlling dithering" on page 341. Custom Preserves the current color table as a fixed palette that does not update with changes to the image. Mac OS Uses the Mac OS system's default 8-bit (256-color) color table, which is based on a uniform sampling of RGB colors. If your image has fewer colors than the total number specified in the color palette, unused colors are removed. Windows Uses the Windows system's default 8-bit (256-color) color table, which is based on a uniform sampling of RGB colors. If your image has fewer colors than the total number specified in the color palette, unused colors are removed. Other color tables appear in the menu if you have saved them previously. (See "Loading and saving color tables" on page 336.) You can use an alpha channel to influence the generation of color tables. (See "Using channels to modify color reduction" on page 329.) To regenerate a color table (ImageReady): Choose Rebuild Color Table from the Color Table palette menu. Use this command to generate a new color table when the Auto Regenerate option is off. (See "Controlling optimization (ImageReady)" on page 326.)

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331
ADOBE PHOTOSHOP 6.0
User Guide
To select a color reduction algorithm:
Choose an option from the Color Reduction
Algorithm pop-up menu (below the file format
menu in the Optimize panel/palette):
Perceptual
Creates a custom color table by giving
priority to colors for which the human eye has
greater sensitivity.
Selective
Creates a color table similar to the
Perceptual color table, but favoring broad areas
of color and the preservation of Web colors.
This color table usually produces images with
the greatest color integrity. Selective is the
default option.
Adaptive
Creates a custom color table by
sampling colors from the spectrum appearing
most commonly in the image. For example, an
image with only the colors green and blue
produces a color table made primarily of greens
and blues. Most images concentrate colors in
particular areas of the spectrum.
Web
Uses the standard 216-color color table
common to the Windows and Mac OS 8-bit
(256-color) palettes. This option ensures that no
browser dither is applied to colors when the image
is displayed using 8-bit color. (This palette is also
called the Web-safe palette.) If your image has
fewer colors than the total number specified in the
color palette, unused colors are removed.
Using the Web palette can create larger files, and is
recommended only when avoiding browser dither
is a high priority. See “Previewing and controlling
dithering” on page 341.
Custom
Preserves the current color table as a
fixed palette that does not update with changes to
the image.
Mac OS
Uses the Mac OS system’s default 8-bit
(256-color) color table, which is based on a
uniform sampling of RGB colors. If your image
has fewer colors than the total number specified in
the color palette, unused colors are removed.
Windows
Uses the Windows system’s default 8-bit
(256-color) color table, which is based on a
uniform sampling of RGB colors. If your image
has fewer colors than the total number specified in
the color palette, unused colors are removed.
Other color tables appear in the menu if you have
saved them previously. (See “Loading and saving
color tables” on page 336.)
You can use an alpha channel to in
uence the
generation of color tables. (See
Using channels
to modify color reduction
on page 329.)
To regenerate a color table (ImageReady):
Choose Rebuild Color Table from the Color Table
palette menu. Use this command to generate a new
color table when the Auto Regenerate option is off.
(See “Controlling optimization (ImageReady)” on
page 326.)