Image encoding method, image decoding method, image encoding device, image decoding device, image encoding program, and image decoding program

Abstract

For each block to be encoded, an image encoding device treats a region having similar image signals in the block as a subject, and sets a single pixel value representing each subject as a subject pixel value so as to be associated with a subject identifier. A subject map generation unit generates a subject map which expresses, with subject identifiers, which subject each pixel in the block belongs to. Using this map, a predicted image generation unit generates a predicted image to be used in prediction of the block to be encoded. A subject map encoding unit encodes the subject map by referring to the subject map used when encoding a reference region that has been encoded.

Description

Technical field [0001] The present invention relates to the encoding and decoding technology of distance image. [0002] This application claims priority based on Japanese Patent Application No. 2011-055238 for which it applied to Japan on March 14, 2011, and the content is quoted here. Background technique [0003] The distance image is an image in which the distance from the camera to the subject is expressed as pixel values. Because the distance from the camera to the subject can also be called the depth of the scene, the distance image is sometimes called the depth image. In addition, because depth is also called depth (Depth), it is sometimes called depth map (Depth Map). In the field of computer graphics, because depth is the information stored in the Z buffer, it is sometimes called Z image or Z image. In addition, in addition to the distance from the camera to the subject, the coordinate value of the Z axis with respect to the three-dimensional coordinate system develope...

AI Technical Summary

Problems solved by technology

In general, the horizontal direction of a captured image is set as the X axis and the vertical direction as the Y axis, so the Z axis coincides with the orientation of the camera. However, there are cases where a common coordinate system is used for multiple cameras, such as Z When the axis does not match the orientation of the camera

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