(1)利用matlab函数进行噪声模拟，并用matlab自带函数进行图像滤波。 (2)利用给定图像_matlab_图像_处理

%利用 matlab 函数进行噪声模拟，并用 matlab 自带函数进行图像滤波。 clc; clear all; Original_Image = imread('图3-5lena.jpg'); %~~~~~~~~~~~~~~~~~~~~~~~~~~~噪声模拟~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Gaussian_Image = imnoise(Original_Image,'Gaussian'); %高斯白噪声模拟 Poisson_Image = imnoise(Original_Image,'Poisson'); %泊松噪声模拟 Speckle_Image = imnoise(Original_Image,'speckle'); %斑点噪声模拟 %localvar_Image = imnoise(Original_Image,'localvar'); %与图象灰度值有关的零均值高斯白噪声模拟 %salt_pepper_Image = imnoise(Original_Image,'salt&pepper'); %椒盐噪声模拟 figure; subplot(221);imshow(Original_Image);title('Original Image'); subplot(222);imshow(Gaussian_Image);title('Gaussian Image'); subplot(223);imshow(Poisson_Image);title('Poisson Image'); subplot(224);imshow(Speckle_Image);title('Speckle Image'); %subplot();imshow(localvar_Image);title('localvar Imagee'); %subplot();imshow(salt & pepper_Image);title('salt & pepper Image'); %~~~~~~~~~~~~~~~~~~~~~~~~~~~3*3均值滤波~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Three_filter=fspecial('average',3); %生成系统预定义的3X3滤波器 %用生成的滤波器进行滤波,并归一化 Gaussian_Average_filter = filter2(Three_filter,Gaussian_Image)/255; Poisson_Average_filter = filter2(Three_filter,Poisson_Image)/255; Speckle_Average_filter = filter2(Three_filter,Speckle_Image)/255; figure; subplot(321);imshow(Gaussian_Image);title('Gaussian Image'); subplot(322);imshow(Gaussian_Average_filter);title('Gaussian Average filter'); subplot(323);imshow(Poisson_Image);title('Poisson Image'); subplot(324);imshow(Poisson_Average_filter);title('Poisson Average filter'); subplot(325);imshow(Speckle_Image);title('Speckle Image'); subplot(326);imshow(Speckle_Average_filter);title('Speckle Average filter'); %~~~~~~~~~~~~~~~~~~~~~~~~~~~3*3中值滤波~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Gaussian_Median_filter = medfilt2(Gaussian_Image,[3 3]); Poisson_Median_filter = medfilt2(Poisson_Image,[3 3]); Speckle_Mediane_filter = medfilt2(Speckle_Image,[3 3]); figure; subplot(321);imshow(Gaussian_Image);title('Gaussian Image'); subplot(322);imshow(Gaussian_Median_filter);title('Gaussian Median filter'); subplot(323);imshow(Poisson_Image);title('Poisson Image'); subplot(324);imshow(Poisson_Median_filter);title('Poisson Median filter'); subplot(325);imshow(Speckle_Image);title('Speckle Image'); subplot(326);imshow(Speckle_Mediane_filter);title('Speckle Median filter'); %~~~~~~~~~~~~~~~~~~~~~~~~~~~均值为5，方差为1的高斯滤波~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Gauss_Sequences=fspecial('gaussian',5,1); %生成高斯序列 Gaussian_Gauss_filter = filter2(Gauss_Sequences,Gaussian_Image)/255; Poisson_Gauss_filter = filter2(Gauss_Sequences,Poisson_Image)/255; Speckle_Gauss_filter = filter2(Gauss_Sequences,Speckle_Image)/255; figure; subplot(321);imshow(Gaussian_Image);title('Gaussian Image'); subplot(322);imshow(Gaussian_Gauss_filter);title('Gaussian Gauss filter'); subplot(323);imshow(Poisson_Image);title('Poisson Image'); subplot(324);imshow(Poisson_Gauss_filter);title('Poisson Gauss filter'); subplot(325);imshow(Speckle_Image);title('Speckle Image'); subplot(326);imshow(Speckle_Gauss_filter);title('Speckle Gauss filter');