IMAGE DATA COMPRESSION, DECOMPRESSION AND DISPLAY DEVICE

摘要

An image data compressing device includes: a maximal value extracting unit and a minimal value extracting unit that respectively extract a maximal value anal a minimal value from pixel values in a prescribed region of image data; a level decision unit that determines quantization levels of the pixel values in the prescribed region based on th e maximal and minimal values extracted; and a comparison unit that compares the images data with the quantization levels and outputs quantized data. Since the comparison unit quantizes the pixel value in the prescribed region by comparing the image data with the quantization levels, it is possible to compress the image data with a simple configuratio n.