Corel PaintShop Pro X7, DE User's Guide download pdf (Page 639)

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Working with advanced color features 635

the image is saved as a 4-bit image. If you specify 17 to 256 colors, the

image is saved as an 8-bit image. Specifying the number of colors is

advantageous when saving to some file formats, such as GIF, because

the file compression is sensitive to the number of colors in the image.

For example, by using 100 colors instead of 256 colors, a smaller GIF

file is created, even though both files are 8-bit images. Smaller files

result in faster download times.

To decrease the color depth to 2 colors

Edit workspace

1 Choose Image  Decrease Color Depth  2 Color palette.

2 In the Palette Component group box, choose the color channel to

use for the final image.

Choosing the Grey values option produces the best results in most

cases. However, if the image consists mainly of a single color,

selecting that color channel may produce the best results.

3 In the Reduction Method group box, choose a color reduction

method.

For more information about color reduction, see “Understanding

color reduction methods” on page 639.

4 In the Palette Weight group box, select an option:

• Weighted — weighted palettes produce less dithering and

sharper edges

• Non-weighted — non-weighted palettes produce more

dithering and softer edges

Note: Dithering places pixels of different colors or gray levels next

to each other to simulate missing colors or grays.

5 Click OK.

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Corel PaintShop Pro X7, DE User's Guide Page 639

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