Wang等人

提出了结构相似性理论

( SSIM) ，对参考图像的亮度，对比度和结构信息进行比较，得

到了较好的结果 他假设 HVS 擅长提取场景中的结构信息，

通过评测失真图像的结构信息的退化程度对图像进行评价，得

到了广泛使用。-Under the assumption that human visual perception is highly

adapted for extracting structural information　a scene, we

introduce an alternative complementary framework for quality

assessment based on the degradation of structural information.

As a specific example of this concept, we develop a Structural

Similarity Index and demonstrate its promise through a set of

intuitive examples, as well as comparison to both subjective

ratings and state-of-the-art objective methods on a　of

images compressed with JPEG and JPEG2000