IMAGE ENCODING APPARATUS, IMAGE ENCODING METHOD, AND COMPUTER PROGRAM

摘要

An image encoding apparatus includes: a luminance component intra-prediction unit which divides an encoding target image into first blocks of (M×M) pixels and determines an intra-prediction mode of a luminance component for each of encoding target blocks of the first block; and a color difference component intra-prediction unit which calculates a weight of a prediction direction by using the intra-prediction mode of the luminance component in the first block and determines an intra-prediction mode of a color difference component of the first block from the weight of the prediction direction.