IMAGE ENCODING METHOD, IMAGE DECODING METHOD, IMAGE ENCODER, IMAGE DECODER, IMAGE ENCODING PROGRAM, AND IMAGE DECODING PROGRAM

摘要

PROBLEM TO BE SOLVED: To express exact block divisions corresponding to the subject with a small code amount to achieve efficient image encoding.

SOLUTION: For an image to be divided into processing regions of a predetermined size in order to perform prediction coding every processing region on the basis of a depth path representing information on subject distance in the image, a pixel group in the processing region is divided into a plurality of prediction units and a boundary prediction unit consisting of pixel groups located at the boundary of the plurality of prediction units. An intra-subject prediction unit consisting of pixel groups not included in the boundary prediction unit is generated every prediction unit, and a method for predicting an image for the pixel groups included in the intra-subject prediction unit or the boundary prediction unit is set every intra-subject prediction unit and boundary prediction unit. Information indicating the set prediction method is encoded, a predictive image of the image in the processing region is generated according to the set prediction method, and the image in the processing region is subjected to prediction coding by using the predictive image.

COPYRIGHT: (C)2013,JPO&INPIT