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

用于MATLAB的图像处理中，作用是可以有效的增强图像的高频细节，而不损坏图像的整体质量。-For the MATLAB image processing, the role can effectively enhance the high frequency details of the image, rather than damage the overall image quality.

该matlab代码主要用于计算图像的边缘强度，信息熵，灰度均值，标准差(均方差MSE)，均方根误差，峰值信噪比（psnr），空间频率(sf)，图像清晰度，互信息(mi)，结构相似性(ssim)，交叉熵(cross entropy)，相对标准差。- calculate the uation average gradient, edge strength, information entropy, gray are Value, standard deviation (mean square er