图像PSNR值及MSE值的计算

% 图像峰值信噪比PSNR、均方根误差MSE% By lyqmath% Xidian University function [PSNR, MSE] = psnr(X, Y)% 计算峰值信噪比PSNR、均方根误差MSE% 如果输入Y为空，则视为X与其本身来计算PSNR、MSEif nargin<2    D = X;else    if any(size(X)~=size(Y))        error('The input size is not equal to each other!');    end    D = X-Y;endMSE = sum(D(:).*D(:))/prod(size(X));PSNR = 10*log10(255^2/MSE);

最后使用的时候注意把X,Y转换成double值...