| 基于人眼感知特性的数字图像压缩技术研究 |
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| 引用本文： | 姚军财.基于人眼感知特性的数字图像压缩技术研究[J].电视技术,2011,35(15):50-53. |
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| 作者姓名： | 姚军财 |
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| 作者单位： | 陕西理工学院物理系,陕西汉中,723000 |
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| 基金项目： | 国家自然科学基金项目(10447005); 陕西省教育厅专项科研基金项目(2010JK463) |
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| 摘 要： | 结合人眼对比度感知特性和图像离散余弦变换特征,提出了一种图像的最小感知误差阈值的计算方法,利用该方法计算的阈值来量化源图像频谱图的各个子块的信息,使得编码时变换域系数中尽可能多的出现零值系数,再通过Huffman编码方法实现编码,并通过实验验证,结果表明平均码长为1.393 3,接近于信源的熵1.123 1,编码效率达到0.8823,压缩比达到13.229 9,峰值信噪比为45.477 5 dB。说明衡量数据压缩性能的性能指标均达到较好效果,同时又因为结合了人眼视觉特性,保证了压缩图像的观测效果。表明提出的阈值计算方法和图像压缩方案是有效的、实用的。
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| 关 键 词： | 图像压缩 人眼视觉特性 对比度敏感阈值 离散余弦变换 |
Digital Image Compression Technology Based on Human Vision System Characteristics |
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| YAO Juncai.Digital Image Compression Technology Based on Human Vision System Characteristics[J].Tv Engineering,2011,35(15):50-53. |
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| Authors: | YAO Juncai |
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| Affiliation: | YAO Juncai(Department of Physics,Shaanxi University of Technology,Shaanxi Hanzhong 723000,China) |
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| Abstract: | Combined the contrast sensitivity characteristics of the human vision system and image characteristics by the discrete cosine transform,the method is proposed to calculate the threshold value of human vision error detecting the spectrum image of different frequencies.And the original spectrum image information of each sub-block is quantified by the threshold calculated in order to occur more zero coefficients in the transform domain coefficients while encoding,and to carry out encoding through Huffman codin... |
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| Keywords: | image compression human vision characteristics contrast sensitivity threshold discrete cosine transform |
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