The current ROI coding methods either have high computational cost or cannot control the relative quality of progressive decoded images.

当前的ROI编码算法不能控制渐进解码图像的相对质量或是计算量太大。

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Region Of Interest (ROI) coding is an important technology presented by JPEG2000. However, JPEG2000 can not support arbitrary-shape ROI and any scaling value at the same time.

感兴趣区(ROI)编码是在JPEG2000中提出的一种重要的技术，然而JPEG2000算法却无法同时支持任意形状roi和任意提升因子。

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The image coding and compression technologies based on the JPEG2000 standard is studied in this article, which focus on region-of-interest (ROI) compression and EBCOT optimization algorithm.

本文主要基于JPEG2000标准来研究图像编码和压缩相关技术，其重点是感兴趣区域（ROI）的压缩和EBCOT算法的优化。

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