IMAGE COMPRESSING DEVICE AND IMAGE DECOMPRESSING DEVICE, AND COMPUTER-READABLE RECORDED MEDIUM ON WHICH PROGRAM FOR ALLOWING COMPUTER TO EXECUTE IMAGE COMPRESSING METHOD AND IMAGE DECOMPRESSING METHOD

摘要

An image compressing device for encoding an image efficiently without causing apparent color misregistration compresses blocks of luminance component image data and blocks of color difference component data, comprising a resolution determining section (38, 142) which adaptively determines the resolution for each reduced block of the data according to a predetermined criteria and generates resolution information.