Corel PaintShop Pro X7, DE User's Guide Page 645

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Working with advanced color features 641
accurate as the Optimized Octree method, but it is better at weighting
color importance.
Optimized Octree — creates an eight-level “tree” with eight branching
nodes totaling 256 individual “leaves” or colors to determine the new
palette. This method attempts to reproduce each color in the original
image, so if your image contains fewer colors than the palette that is
generated, every color in the image is represented. This method is
faster and more accurate than Optimized Median Cut, but is not as
good at weighting color importance.
Windows — changes each pixel’s color to the nearest color in the
Windows palette
Standard/Web-Safe Palette — changes each pixel’s color to the nearest
color in the standard Web-safe palette. You can use this method to
create images for the Web that can be viewed without color distortion
on most monitors.
Working with image palettes
An image palette is a collection of colors that an image uses — similar
to a painter’s palette. An image palette is a subset of all the colors your
monitor can display. Not all images have image palettes — only images
with color depths between 16 and 256 colors have palettes that you
can fine-tune and edit.
Images with a color depth of 16 million colors do not have an image
palette because they can contain all the colors your computer can
display. For these images, you can load an image palette to decrease
the image’s color depth to 256 colors (8-bit). Loading a palette
produces the same result as decreasing color depth, except that you
are controlling which colors are used in the converted image. For more
information about color depth, see “Understanding color depth” on
page 629.
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