Graphics files are big, and most file formats (such as BMP, TIFF, PICT, and PCX) are inefficiently coded, so they are larger than they need to be. So how do graphics programmers save disk space? They develop compression techniques. Graphics compression techniques fall into two camps: lossless and lossy. Lossless techniques throw away redundant bits of information without affecting the quality of the image. Lossy techniques, such as JPEG, crunch files down smaller, but they throw out image quality in the process. Most of the time, however, you can't see the difference in image quality unless you try to print the graphics on a professional imagesetter.
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