图像BPR,MSE,RMSE,PSNR求取模块

本模块采用opencv中的Mat类型对图像进行操作

其中，SrcImageRec为原始参考图像，SrcUp为处理后的图像！

#pragma region Criterion BPR MSE RMSE PSNR

  Mat BadImage = Mat::zeros(SrcUp.size(),SrcUp.type());
  double BRP = 0.0,Mse = 0.0 , Rmse = 0.0, Psnr = 0.0;
  double blackcnt = 0.0,cnt = 0.0;
  int dv = 0;
  long sum = 0;

  for (int j = 0; j < height; j++)
  {
    for (int i = 0; i < width; i++)
    {
      if (SrcImageRec.at<uchar>(j,i) != 0)
      {
        //MSE RMSE PSNR
        dv = abs(SrcImageRec.at<uchar>(j,i) - SrcUp.at<uchar>(j,i));
        dv = pow(dv,2);
        sum += dv;
        //BPR
        if (dv > 1)
        {
          BadImage.at<uchar>(j,i) = 0;
          cnt++;
        }
        else
        {
          BadImage.at<uchar>(j,i) = 255;
        }
      } 
      else
      {
        blackcnt++;
      }
    }
  }

  BRP = 1.0 * cnt / (height * width - blackcnt)*100;
  Mse = 1.0 * sum/(height*width - blackcnt);
  Rmse = sqrt(Mse);
  Psnr = 10 * log10(255*255/(Mse));

  cout<<"Lee DADU Imagescale "<<Imagescale<<" BPR  : "<<BRP<<"%"<<endl;
  cout<<"Lee DADU Imagescale "<<Imagescale<<" MSE  : "<<Mse<<endl;
  cout<<"Lee DADU Imagescale "<<Imagescale<<" RMSE : "<<Rmse<<endl;
  cout<<"Lee DADU Imagescale "<<Imagescale<<" PSNR : "<<Psnr<<endl;
  imwrite(argv[5],BadImage);
#pragma endregion