图片结构相似度评价，附加MSE,SNR,PSNR等作为对比参数-Photo structure similarity evaluation, additional MSE, SNR, PSNR, etc., as comparative parameters

good resource code for people to get better performance.such as ssim,rmse etc.

IQA评估指标包括PLCC，SROCC，KROCC，PSNR，SSIM (Structural Similarity），MSE (Mean Square Error)，RMSE (Root Mean Square Error) ，信息熵 (Information Entropy)算法(IQA evaluation indicators include PLCC, SROCC, KROCC, PSNR, SSIM (Structural Similarity), MSE (Mean Square