| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for transcoding a JPEG2000 compressed image to a lower bit-rate or lower resolution or both. SOLUTION: The JPEG2000 compressed image is transcoded to a lower bit-rate, lower resolution, or both, without having to decompress a first JPEG2000 image and then recompress it to a lower bit-rate and/or resolution. Arithmetic decoding is performed only to the nearest higher bit-rate layer, up to the desired resolution, before performing rate-distortion optimization to produce the transcoded image. COPYRIGHT: (C)2005,JPO&NCIPI |
