试一试:
函数(P, MSE) = Untitled (original_img stego_img)
original_img =双(original_img);
stego_img =双(stego_img);
如果(original_img = = stego_img)
PSNR值= 100;
MSE = 0;%添加这一行
其他的
m =大小(original_img, 1);
n =大小(stego_img 2);
d = 0;
为我= 1:m - 1
为j = 1: n - 1
d = d + (original_img (i, j)——stego_img (i, j))。^ 2;
结束
结束
MSE = d / (m * n);
MAX = MAX (abs (original_img (:)));
PSNR = 10 * log10 (MAX ^ 2 / MSE);
结束
P = PSNR值;
结束