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Mastering ImageReady

Creating Transparent JPEGs

Suppose that you want to cut out the foreground of an image and see the web page's background, but you want to keep the image as 24-bit color. I suggest that you rethink your intent. Why do you need 24-bit color? You can, of course, save it as a PNG-24 if you feel that you really need every possible color available on a computer screen. Although it produces larger file sizes than JPEG, it natively supports transparency. Remember that some older web browsers can't display PNG files. That is rarely a problem, however.

Alternatively, you can get the benefits of the JPEG format's smaller file size and wider compatibility by simulating transparency. Here's how:


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