An image quality control technique for the ROI coding in JPEG2000 and its application to the motion pictures

摘要

In JPEG2000 coding, SNR scalability on the basis of regions of interests (ROI) is considered as one of the main features. However, the image quality of the background region is severely degraded in this case. This paper proposes an image control technique for ROI coding with consideration of SNR scalability by separating the ROI coding and the rate-control operation. The proposed method can improve the image quality for the background region, without severely degrading the image quality of the ROI. An application of the proposed technique to motion pictures is also considered.