一种评价压缩技术的新标准

M. Mittal, V. Singh, R. Krishnan
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引用次数: 2

摘要

目前,用于评估压缩技术性能的参数大多是基于统计的,如平均误差、均方根误差等,这些参数提供了图像压缩在全局基础上的影响,但并不能表明对图像任何区域边缘的影响。没有直接的单一参数可用来定量衡量压缩对选定区域边缘强度的影响。本文提出了一个新的参数,称为频率捕获函数(FCF),用于根据对图像选定区域边缘强度的影响来衡量压缩技术的性能。我们使用该参数比较了JPEG、基于小波的分层树集分割(SPIHT)和自适应差分脉冲编码调制(ADPCM)压缩技术对测试图像的性能。得到的结果与用这些技术压缩和重建的图像的视觉质量评价一致。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A new criteria for evaluation of compression technique
Currently, most of the parameters used to evaluate the performance of a compression technique are statistical based like, average error, RMS error, etc., which provide the impact of image compression on a global basis, but does not indicate the effect on edges in any region of the image. No direct single parameter is available which gives the quantitative measure of the effect of compression on the strength of edges in a selected region. Here, a new parameter called the frequency capture function (FCF) has been proposed to measure the performance of a compression technique in terms of the impact on the edge strength in a selected region of the image. We have used this parameter to compare the performances of JPEG, wavelet based set partitioning in hierarchical trees (SPIHT) and adaptive differential pulse code modulation (ADPCM) compression techniques for a test image. Results obtained are in agreement with visual quality evaluation of the images compressed and reconstructed with these techniques.
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