Optimizing An Image As A Gif - Ulead PHOTOIMPACT 11 User Manual

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3. Drag the slider or enter a value in Quality, or use Compress by Size to
compress the image to a specific file size or ratio. Higher compression levels
lead to lower image quality.
4. Click Matte on the Mask Options tab to select a background color. The matte
color will also fill the transparent pixel area if the image already has a mask, or
you select one from Mask.
5. Click Save As.
Notes:
• Unlike GIF and PNG, the JPEG file format does not support transparent
backgrounds. The background remains white when selecting None or White as
the matte.
• To display a matte color directly, use non-rectangular objects for optimization.
However, you can still display a matte color in rectangular images by selecting
Pick Color from the Mask list. Next, click Add to Mask and then click an image
area as a mask. Finally, choose a matte from the Matte list.

Optimizing an image as a GIF

GIF Image Optimizer saves files as GIF images with the transparent option. You
can also assign a mask or matte to it. Because GIFs support maximum 256 (8-bit)
colors, it is more suitable for line art or text than for photorealistic images.
To optimize an image as a GIF:
1. Select Web: Image Optimizer. If objects have been selected, decide how to
save these objects for optimization.
2. Click GIF Image Optimizer.
3. Select a color palette from Preset in the GIF Options tab. Customize it further
with options such as number of colors.
4. Click Transparency or Matte (depicted as an arrow) in the Mask Options tab
to select a background color. The transparent background displays an object
that merges with the Web background smoothly on a Web page. The matte
color will also fill the transparent pixel area if the image already has a mask, or
you select one from Mask.
Notes:
• Although making a background transparent means that it will not show on a
Web page, try to crop the image (using Crop) as close as possible to reduce the
file size.
• Using Compress by Size compresses the image to a specific file size or ratio.
5. Modify the current palette in the Palette tab as needed. For example:
• To modify a color, click a color cell, then click Palette menu to select a
command.
CHAPTER 8: ALL FOR THE WEB 269

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