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
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
侯 俊;方向忠;李继良;殷海滨. 多码率JPEG2000的感兴趣区域编码[J]. 计算机工程, 2007, 33(05): 200-201.
HOU Jun; FANG Xiangzhong; LI Jiliang; YIN Haibin. Multi-rate Coding of Region of Interest for JPEG2000[J]. Computer Engineering, 2007, 33(05): 200-201.