SSIM 近些年来被广泛用于衡量图象的质量,它克服了PSNR固有的一些局限性.目前网络上的SSIM相关的实现代码主要是MATLAB或者使用OPENCV库的代码.本代码完全采用C语言实现,接口简单,便于嵌入到用户代码中评估生成的图象质量-Using pure C language, this code implement the SSIM algorithm presented in the paper "Image Quality Assessment: From Error Visibility to

Structural Similarity"　of IEEE Transaction on image processing.