| 高帧频数字图像序列实时压缩算法 |
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| 引用本文： | 隋玉萍,何昕,魏仲慧.高帧频数字图像序列实时压缩算法[J].大连理工大学学报,2009,49(3):454-458. |
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| 作者姓名： | 隋玉萍 何昕 魏仲慧 |
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| 作者单位： | 1. 中国科学院长春光学精密机械与物理研究所,吉林,长春,130033;中国科学院研究生院,北京100039
2. 中国科学院长春光学精密机械与物理研究所,吉林,长春,130033 |
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| 基金项目： | “八六三”国家高技术研究发展计划资助项目 |
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| 摘 要： | 针对高帧频数字图像序列的特点,提出了一种自适应近无损压缩算法,将连续的n帧分为一节,每节的第一帧进行基于帧内感兴趣区域(region of interest,ROI)的压缩,其他帧在帧间差分和阈值处理后进行游程编码.在第一帧内,利用形态Harr小波提升和连通性分析检测出高频子带中的感兴趣区域.对感兴趣区域采用Rice无损熵编码,背景区域不编码.低频子带直接输出.实验结果表明,该算法在帧内能有效地划分感兴趣区域,压缩率在30以上,峰值信噪比在42 dB以上,目标无失真;帧间压缩的压缩率在7左右,背景区域有误差累积,但整体图像的峰值信噪比都在40 dB以上,目标无失真.该算法的计算复杂度较低,易于硬件实现,而且还具有自适应性和数据包独立的优点,适合于高帧频数字图像序列的实时压缩应用.
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| 关 键 词： | 高帧频数字图像序列 实时压缩 形态Harr小波 感兴趣区域 |
A real-time compression algorithm of high frame-frequency digital image sequence |
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| SUI Yuping,HE Xin,WEI Zhonghui.A real-time compression algorithm of high frame-frequency digital image sequence[J].Journal of Dalian University of Technology,2009,49(3):454-458. |
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| Authors: | SUI Yuping HE Xin WEI Zhonghui |
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| Institution: | SUI Yu-ping*1,2,HE Xin1,WEI Zhong-hui1(1.Changchun Institute of Optics,Fine Mechanics , Physics,Chinese Academy of Sciences,Changchun 130033,China,2.Graduate School of the Chinese Academy of Sciences,Beijing 100039,China) |
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| Abstract: | According to the characteristics of high frame-frequency digital image sequence,an adaptive near-lossless compression algorithm is proposed.n consecutive frames were defined as a segment,its first frame was compressed based on ROI(region of interest) intra-framely,and the others were run-length coded after inter-frame difference and threshold processing.In the first frame,ROI of high-frequency subbands was detected by morphological Harr wavelet lifting and connectivity analysis.Rice lossless entropy encoder... |
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| Keywords: | high frame-frequency digital image sequence real-time compression morphological Harr wavelet region of interest |
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