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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JPEG2000 is a new international standard for still image coding and provides many new features, such as progressive recovery of image by fidelity or resolution and region of interest (ROI) coding.

JPEG2000是一种新的静止图像编码国际标准，它提供了诸如基于失真度及分辨率的图像渐进恢复，感兴趣区域编码等新特性。

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