... theprobability of occurrence of aiin the data. The entropy of aiis the smallest number of bits needed, on average, to represent symbol ai. Claude Shannon, the creator of information theory, ... 272continuous-tone, 273discrete-tone, 274grayscale, 275interlaced, 44resolution of, 143types of, 143–144image compression, 143–226bi-level (extended to grayscale), 150284 Answers to Exercises1.4. ... data files.1.5. RLE of images is based on the idea that adjacent pixels tend to be identical. Thelast pixel of a row, however, has no reason to be identical to the first pixel of the nextrow.1.6....