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Chapter 28. Optimizing Web Images > Optimizing the Compression in JPEGs

Optimizing the Compression in JPEGs

JPEG images don't have palettes as GIFs and PNGs do. Instead, the JPEG format compresses the visual information in an image by making it more efficient and tossing out information that the human eye isn't likely to miss. Too much compression gets rid of too much information, and image quality deteriorates noticeably.

GEEKSPEAK

Compression in a graphics format such as JPEG makes a lighter image file by losing a portion of the visual information. Too much compression gets rid of too much information, and image quality deteriorates noticeably.



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