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Preparing Clipart for the Web
Clipart is defined as non-photographic image information, with a lot of solid-color areas. For this process the GIF or PNG8 formats would serve best. The GIF (Graphics Interchange File) and PNG (Portable Network Graphics) formats use an RLE (Run Length Encoding) scheme. When the file is saved areas of solid color are compressed into small units and then restored to the file when it is opened. The GIF format supports a maximum of 256 colors. While that may not seem like much, most GIF images, such as clipart and text, contain far less color information. By reducing the number of colors available for the GIF color table, you can significantly reduce the image's file size. For example, a GIF image of black text might only require a maximum of 2 colors (black and white). Experiment with the GIF Colors option to produce small, fast-loading image files. Since the GIF format has been around for a long time, using it almost guarantees the image will open on a visitor's browser. The PNG format is newer, and has some new encoding schemes that make even smaller files, but it is not supported by all Web browsers.
Prepare Clipart for the Web
Open a clipart document.
Click the File menu, and then click Save As .
Enter a name for the file in the Save As box.
Click the Where (Mac) or Save In (Win) list arrow, and then select a location to save the file.
Click the Format list arrow, and then click CompuServe GIF .
Click Save .
Select from the following Indexed Color options:
Palette.
Click the list arrow, and then select from the available color palette options, including Web (Safe), Mac, and Win System palettes.
Colors.
If you selected a local color, or custom palette, click to select the number of colors saved with the image. The maximum number of colors is 256.
Forced.
Click the list arrow, and then select what colors will be forced to remain in the image.
Transparency.
Select the check box to preserve any transparent areas.
Matte.
If the image contains transparent areas, clicking this list arrow lets you select a color to fill the areas. For example, you could fill all transparent areas of the image with black to match the black of a Web document.
Dither.
Click the list arrow, and then select how you want the remaining images color to mix.
Amount.
Enter an Amount percentage to instruct the GIF format how aggressively to Dither the image colors.
Preserve Exact Colors.
Select the check box to force the preservation of the original image colors (based on how many colors were chosen using the Palette option).
Click OK. [View full size image]
