该程序SSIM（结构相似度）是基于matlab平台，用于图像的客观质量评价，是FR中精典算法,The program SSIM (structural similarity) is based on matlab platform for an objective image quality evaluation, is in the classical algorithm FR

ssim是结构化相似度，描述两个图像之间在结构上的相似程度，一般用与检测图像的不可见性。-Ssim is structural similarity, described in structural similarity between two images, and is commonly used in testing the invisibility of the image。