| 嵌入掩膜的SPIHT任意形状ROI编码 |
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| 引用本文： | 徐勇,徐智勇,张启衡,左颢睿.嵌入掩膜的SPIHT任意形状ROI编码[J].光电工程,2009,36(9). |
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| 作者姓名： | 徐勇 徐智勇 张启衡 左颢睿 |
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| 作者单位： | 1. 中国科学院光电技术研究所,成都,610209;中国科学院研究生院,北京,100039
2. 中国科学院光电技术研究所,成都,610209 |
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| 摘 要： | 感兴趣区域(ROI)编码可以在低码率条件下获得高质量的局部感兴趣区域,或在图像渐进传输中使感兴趣区域获得优先传输.本文在分析了当前各类ROI编码方法的基础上,基于SPIHT算法提出了一种支持多个任意形状感兴趣区域并生成可任意截断码流的ROI编码算法.该算法在SPIHT算法中嵌入了重要系数的ROI掩膜信息,使编码器同步地进行图像和ROI形状的编码,使得生成的码流具有任意可截断的特性.文中还就图像ROI编码的质量评价指标进行了讨论,并给出了一种充分考虑ROI和背景的重要性与面积比例差别的图像质量评价指标,称为重要性.面积加权峰值信噪比(WPSNR).实验结果表明,该算法支持有损到无损的多个任意形状ROI的图像编码,而且ROI优先级可调,能够生成具有嵌入式可截断性质的码流,在任意地方截断仍能保证解码器所需的图像信息和ROI掩膜信息,且计算复杂度和SPIHT相当,压缩效果高于BbB移位算法.适用于低码率应用或感兴趣优先渐进传输的应用.
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| 关 键 词： | 感兴趣区域编码 任意形状 图像压缩 掩膜 |
A Mask Embedded SPIHT Algorithm for Arbitrary Shape ROI Coding |
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| XU Yong,XU Zhi-yong,ZHANG Qi-heng,ZUO Hao-rui.A Mask Embedded SPIHT Algorithm for Arbitrary Shape ROI Coding[J].Opto-Electronic Engineering,2009,36(9). |
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| Authors: | XU Yong XU Zhi-yong ZHANG Qi-heng ZUO Hao-rui |
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| Affiliation: | XU Yong1,2,XU Zhi-yong1,ZHANG Qi-heng1,ZUO Hao-rui1,2 ( 1. Institute of Optics and Electronics,Chinese Academy of Sciences,Chengdu 610209,China,2. Graduate School of Chinese Academy of Sciences,Beijing 100039,China ) |
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| Abstract: | Based on the analysis of the current kinds of Region of Interest (ROI) coding, a mask embedded SPIHT algorithm was proposed, which supported multiple ROI in arbitrary shape. The innovation of proposed algorithm was that the coding of ROI mask was embedded into the SPIHT coding process. As the image and the mask information were coded synchronously, the bits stream could be truncated arbitrarily. Image quality evaluation method for ROI coding was also discussed. An image quality evaluation value called impor... |
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| Keywords: | SPIHT |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
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