Abstract: A method is proposed to encode multiple regions of interest(ROI) in JPEG2000 image. According to the convex character of rate-distortion(R-D) function, it assigns different bit rate to ROI and background(BG). As a result, in each layer, more ROI information is coded than BG. The proposed strategy produces a fully compliant JPEG2000 code stream. It allows transmission of different ROIs with different priorities and supports dynamic delineation and prioritization of them.

Key words: JPEG2000, Region of interest (ROI), Multi-rate, Dynamic coding

摘要： 提出了一种支持多个JPEG2000感兴趣区域(ROI)编码的算法，利用JPEG2000率失真函数为凸函数的特性，在每层对ROI和背景(BG)分配不同的码率，对应不同的截止门限，最终生成的包将不同截止门限的码块流连接在一起。该方法支持动态定义多优先级ROI，生成码流与标准完全兼容。

关键词: JPEG2000, 感兴趣区域, 多码率, 动态编码