gusucode.com > 基于matlab的JPEG彩色图像编码解码源码程序 > 基于matlab的JPEG彩色图像编码解码源码程序/code/PSNR.m
function PSNR = PSNR(A,B) %计算输入两图像A,B的峰值信噪比PSNR(dB) A = double(A); %%图像数据类型转换 B = double(B); [Row,Col] = size(A);%%输入图像的大小 % [Row,Col] = size(B); MSE = sum(sum(sum((A(:,:,:) - B(:,:,:)).^2)) )/ (3*Row * Col); %%均方误差MSE %MSE1 = sum(sum((A(:,:,1) - B(:,:,1)).^2)) / (Row * Col); %%均方误差MSE %MSE2 = sum(sum((A(:,:,2) - B(:,:,2)).^2)) / (Row * Col); %%均方误差MSE %MSE3 = sum(sum((A(:,:,3) - B(:,:,3)).^2)) / (Row * Col); %%均方误差MSE %MSE=(MSE1+MSE2+MSE3)/3; PSNR = 10 * log10(255^2/MSE); %%峰值信噪比PSNR(dB)