[MATLAB图像处理] 求助：帮忙改改这程序 - MATLAB爱好者论坛-LabFans.com

紫馨86 · 2009-05-04, 15:08

求图像的峰值信噪比
clear all;
close all;
X=imread('toys.bmp');
[height width]=size(X);
X=im2double(X);
A=imnoise(X,'gaussian',0,0.02);
X=double(X);
A=double(A);
sigma=0;msey=0;
for i=1:256
for j=1:256
sigma=sigma+(X(i,j)-A(i,j))^2;
end
end
sigma
msey=(1/(256*256))*sigma
psny=10*(log10(255^2/msey))

数值结果始终不对，大家帮帮忙忙啊

2009-05-04, 15:08	#1
紫馨86 初级会员注册日期: 2009-04-15 帖子: 7 声望力: 0	求助：帮忙改改这程序求图像的峰值信噪比 clear all; close all; X=imread('toys.bmp'); [height width]=size(X); X=im2double(X); A=imnoise(X,'gaussian',0,0.02); X=double(X); A=double(A); sigma=0;msey=0; for i=1:256 for j=1:256 sigma=sigma+(X(i,j)-A(i,j))^2; end end sigma msey=(1/(256256))sigma psny=10*(log10(255^2/msey)) 数值结果始终不对，大家帮帮忙忙啊