matlab代码，自动添加多种图像噪声

clc clear close all img = imread('airfield.bmp'); %读入图像 img = im2double(img); figure,subplot(2,2,1),imshow(img,[]),title('原图'); % 添加泊松噪声 img_po = imnoise(img,'poisson'); subplot(2,2,2),imshow(img_po,[]),title('原图+泊松'); % 添加椒盐噪声 img_sp = imnoise(img_po,'salt & pepper',0.01); subplot(2,2,3),imshow(img_sp,[]),title('原图+泊松+椒盐'); % 添加高斯噪声 img_ga = imnoise(img_sp,'gaussian',0,(10/(2^8-1))^2); %添加均值为0，标准差为sigma高斯噪声 subplot(2,2,4),imshow(img_ga,[]),title('原图+泊松+椒盐+高斯'); % 噪声图像 noise = img_ga-img; figure,imshow(noise,[]),title('噪声'); %% 三维曲线 figure,mesh(img),title('原图'); figure,mesh(noise),title('噪声'); figure,mesh(img_ga),title('原图+噪声');