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指出了峰峰值信噪比ＰＳＮＲ 用于图象质量评价的缺点，提出了一个直接度量解压缩图象质量的客观指标——细节信噪比ＤＳＮＲ，它能客观反映细节信号能量和噪声对图象质量的影响。实验证明，在相同场景中ＤＳＮＲ能较好地反映ＰＳＮＲ的变化，因而可以用于对同一图象的不同解压缩图象以及图象序列的评价。
Pointed out the shortcoming that PSNR of peak-to-peak signal-to-noise ratio is used for image quality evaluation, and proposed an objective metric of direct measurement and decompression of image quality - the detail signal-to-noise ratio DSNR which objectively reflects the detail signal energy and noise on image Quality impact. Experiments show that DSNR can reflect the change of PSNR well in the same scene and thus can be used to evaluate the different decompressed images and image sequences of the same image.