The Computer Dictionary

JPEG
Joint Photographic Experts Group

This is a cross-platform (Mac and PC) color image file compression format. Unlike GIF, JPEG is not limited in color rendition. Therefore, JPEG is the most common format for compressing photographic images. However, JPEG is a "lossy" format, meaning that some quality is lost in compression. If the image is overly compressed, the graphic becomes noticeably "blocky." The file-name extension for JPEG is .jpg.

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