The disadvantage of PSNR

the most common objective measure to evaluate the decompressed images

is pointed out. A new measure named DSNR (Detail SignalNoise Ratio) is therefore proposed. DSNR can be calculated by abstracting energy of detail signal and noise. Using DSNR

the quality of decompressed images can be directly measured without the original (uncompressed) images. Our experiments show that DSNR of different images in the same scene changes congruously with PSNR

thus can be used to evaluate the quality of decompressed images and image sequences.