Combined with the summarizable analysis of the existing roi detection techniques, an openness roi automatic detection algorithm is proposed . the test results show that the algorithm is efficient . then, based on the analysis of two roi coding algorithms, combined with the characteristic of detection results, a fast roi mask generation algorithm is designed 结合对现有roi检测算法的总结分析,本文提出了一种用于遥感图象的roi自动检测算法,测试结果验证了该算法的有效性;然后,在对两种roi编码算法深入研究的基础上,结合本文检测结果的特点,设计了一种roi快速掩模产生算法,该算法优于jpeg2000的roi掩模产生算法,极大地减少了roi编码时间。