MAGE CODING APPARATUS, IMAGE CODING METHOD, IMAGE CODING PROGRAM, IMAGE DECODING APPARATUS, IMAGE DECODING METHOD, AND IMAGE DECODING PROGRAM

In an image coding apparatus that codes, on a block-by-block basis, a distance image including depth values each representing a pixel-by-pixel distance from a viewpoint to a subject, a segmentation unit divides a block of a texture image including luminance values of individual pixels of the subject into segments including the pixels on the basis of the luminance values, and an intra-plane prediction unit sets a depth value of each of the divided segments included in one block of the distance image on the basis of depth values of pixels included in an already-coded block adjacent to the block, and generates, on a block-by-block basis, a predicted image including the set depth values of the individual segments.