IMAGE DATA COMPRESSION METHOD AND IMAGE DATA MANAGEMENT METHOD

摘要

PROBLEM TO BE SOLVED: To compress and store image data obtained by high definition by high compressibility and to reproduce the stored image data at a high speed as images of a small data amount. SOLUTION: The image data of 12 bits per pixel obtained by a CCD 1 are separated into the high order side bit data of the high order 8 bits of high correlation and the low order side bit data of low correlation. JPEG lossless encoding is executed to the high order side bit data and a bit shift operation/ packing processing to two pixels is executed to the low order bit data. The processed high order side bit data and low order side bit data and position information for individually managing them are stored in a storage medium 2. Just by decoding the high order side bit data of the high correlation, the coarse images of the small data amount are reproduced at a high speed.