基于JPEG2000标准的ROI编码研究  

Region of Interest Coding Based on JPEG2000

作　　者：蔡文君[1] 李玲远[1] 彭义波[1] 

机构地区：[1]华中师范大学电子与信息工程系,湖北武汉430079

出　　处：《电子科技》2005年第6期32-35,共4页Electronic Science and Technology

摘　　要：JPEG2000是由ISO/ITU-T最近开发的图像和视频压缩标准,它的Part Ⅰ(核心编码算法)已经于2000年12月份正式成为了国际标准。进一步的工作正在进行,裁剪标准以适应特殊的应用,例如医学图像和视频编码。JPEG2000在单一的位流中提供了多种功能。本文主要研究的是它的感兴趣区域(ROI)编码的特点,也就是在一幅图像中用比背景更多的细节来编码图像中的ROI区域。接着概述了JPEG2000中的三种有效的ROI编码方法,它们分别以不同的空间质量来编码解码图像:叠块、编码块的选择和系数位移,并且从经验上研究了它们的编码性能。JPEG2000 is the latest image and video compression standard developed by the ISO/ITU-T. JPEG2000 Part Ⅰ , the core-coding algorithm, became an international standard in December 2000 and further work is ongoing to tailor the standard to specific applications, such as medical imaging and video coding. JPEG2000 provides, in a single bit-stream, a broad set of functionalities. The specific functionality investigated in this paper is the ability of JPEG2000 to encode a ROI in an image with more detail than the background. The three methods by which ROI coding can be achieved in JPEG2000 (tiling; coefficient scaling; and code-block selection) are then outlined and their relative performance empirically investigated.

关 键 词：图像编码 JPEG2000 感兴趣区域编码 

分 类 号：TN919.81[电子电信—通信与信息系统]