IMAGE PROCESSING APPARATUS AND METHOD

摘要

This invention reduces the image data capacity by using PQR (spectral auxiliary coefficients) in addition to CIELAB (fundamental stimulus values). To accomplish this, there is provided an image processing apparatus which inputs image data representing an image, and performs an image process. The image data has a fundamental stimulus value and spectral auxiliary coefficient. The data amount of the fundamental stimulus value is constant regardless of the image area, and that of the spectral auxiliary coefficient changes in accordance with the image area.