| 摘要 |
PROBLEM TO BE SOLVED: To generate a natural image with a reduced image quality difference at the boundary of tiles generated by different coding methods, when decoding coded image data of each tile unit in which coded data generated by a plurality of coding methods at least including an irreversible coding method are mixed.SOLUTION: When decoding the coded data of an image having the coded data of a tile based on JPEG 2000, mixed with the coded data of a tile based on JPEG-LS, it is determined for each tile unit which coding method the coded data is based on, so that decoding processing for a type corresponding to the determination result is executed. As a result of the decoding, if the tile of interest is based on JPEG 2000 and the adjacent tile is based on JPEG-LS, image processing using a filter is executed so as not to produce unnaturalness at the tile boundary therebetween. |
