SSIM
- https://blog.csdn.net/qq_27825451/article/details/104016874
- https://zhuanlan.zhihu.com/p/410562138
- https://zhuanlan.zhihu.com/p/399215180
- https://blog.csdn.net/jacke121/article/details/90749274
- https://wenku.baidu.com/view/0cefc646954bcf84b9d528ea81c758f5f71f2951.html?wkts=1698978452470&needWelcomeRecommand=1