Labels:book | bottle | broccoli | bulletin board | bus | daily | food | sandwich | sky | tribute album OCR: 44 0 SECTION CHAPTER 8 What happens during lossy compression? Lossy compression techniques discard some data from an image to shrink its file size JPEG C lossy version of run-length encoding that can be applied to images, such as photographs, that don't have large areas of solid color. True Color pho- tograph might not have any adjoining pixels of the same color. Applying RLE to such photo would not result in any compression whatsoever. JPEG preprocesses an image by tweaking the colors in adjoining pixels that they are the same color whenever possible. After this preprocessing complete run-length encoding can be applied with more success FIGURE 8-25 For many images lossy compression results in only minor reduction JPEG compression can slightly the sharpness of the image The reduction in qu ...
