基于灰色关联分析的图像保真度准则

Image Fidelity Criterion Based on Grey Relational Analysis

针对图像保真度评价问题 ,利用灰色系统理论中的灰色关联分析 (GreyRelationalAnalysis ,GRA)的整体比较机制和小波变换的多尺度分辨率匹配于人类视觉系统 (HumanVisualSystem ,HVS)的多信道模型性质 ,通过小波域系数之间的灰色关联度 ,给出了一种图像质量评价算法———小波系数灰关联法 实验表明 :该算法可以从概貌质量和细节质量分别对图像进行评判 ,评价结果能够与人眼主观评价保持较好的一致性 。

By applying Grey System Theory, a grey relational analysis (GRA) relying on wavelet coefficients is presented The algorithm makes full use of perfect integral comparison mechanism of GRA and the well matching of discrete wavelet transform with multi channel model of Human Visual System Experimental results show that the proposed algorithm can not only evaluate the integral and detail quality of image fidelity accurately but also bears more consistency with the human visual system than the traditional method PSNR