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Chapter 11. Working with ImageReady > Preparing Images for the Web

Preparing Images for the Web

If Photoshop and ImageReady have the same tools—and both can save images in GIF, JPEG, and PNG formats—how do you know when to use which one? If you're just dealing with one picture, you can use either. If you want to optimize several pictures so that they display well while using as little memory as possible, use ImageReady to do the optimization. You can edit, apply filters and type, and color correct in either program. Obviously, if you're going to be designing animations or using rollovers and slices, or any other kind of motion graphics, you have to do them in ImageReady.

The first thing you need to learn about preparing web graphics is the type of file format to use. File formats for web use are optimized in one of several ways to make the file as small as possible without losing detail in the image or having colors turn blotchy instead of making the smooth continuous transitions that we expect to see in a photograph. As you learned earlier, there are two standard choices: GIF and JPEG. The third format, PNG, has been out for several years and promised to be the best choice of all three, but it never really caught on.


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