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%载入图像 RGB = imread('autumn.tif'); figure(1); imshow(RGB); %将真彩图转换为灰度图 I = rgb2gray(RGB); figure(2); imshow(I); %进行余弦变换 J = dct2(I); figure(3); imshow(log(abs(J)),[]); colormap(jet(64)); c

%例程7－1 噪声图像维纳滤波 % e.g.7-1.m for example7-1; %test the function of weina filter. RGB = imread('saturn.png'); I = rgb2gray(RGB); J = imnoise(I,'gaussian',0,0.005); figure, imshow(J); K = wien

%对autumn.tif文件计算二维DCT变换 RGB = imread('autumn.tif'); I = rgb2gray(RGB); %真彩色图像转换成灰度图像 J = dct2(I); %计算二维DCT变换 imshow(log(abs(J)),[]) %图像大部分能量集中在上左角处 colormap(jet(64)), colorbar figure; J(abs(

%对autumn.tif文件计算二维DCT变换 RGB = imread('autumn.tif'); I = rgb2gray(RGB); %真彩色图像转换成灰度图像 J = dct2(I); %计算二维DCT变换 imshow(log(abs(J)),[]) %图像大部分能量集中在上左角处 colormap(jet(64)), colorbar figure; J(abs(

%载入图像 RGB = imread('saturn.png'); %RGB转换为灰度图 I = rgb2gray(RGB); %加入高斯白噪声 J = imnoise(I,'gaussian',0,0.005); %采用自适应滤波 K = wiener2(J,[5 5]); %显示原始图像、加入噪声的图像以及滤波后的噪声 imshow(I) figure,imshow(J)

%载入图像 RGB = imread('autumn.tif'); figure(1); imshow(RGB); %将真彩图转换为灰度图 I = rgb2gray(RGB); figure(2); imshow(I); %进行余弦变换 J = dct2(I); figure(3); imshow(log(abs(J)),[]); colormap(jet(64)); c

%对autumn.tif文件计算二维DCT变换 RGB = imread('autumn.tif'); I = rgb2gray(RGB); %真彩色图像转换成灰度图像 J = dct2(I); %计算二维DCT变换 imshow(log(abs(J)),[]) %图像大部分能量集中在上左角处 colormap(jet(64)), colorbar figure; J(abs(

%载入图像 RGB = imread('saturn.png'); %RGB转换为灰度图 I = rgb2gray(RGB); %加入高斯白噪声 J = imnoise(I,'gaussian',0,0.005); %采用自适应滤波 K = wiener2(J,[5 5]); %显示原始图像、加入噪声的图像以及滤波后的噪声 imshow(I) figure,imshow(J)

%载入图像 RGB = imread('autumn.tif'); figure(1); imshow(RGB); %将真彩图转换为灰度图 I = rgb2gray(RGB); figure(2); imshow(I); %进行余弦变换 J = dct2(I); figure(3); imshow(log(abs(J)),[]); colormap(jet(64)); c

RGB = imread('autumn.tif'); I = rgb2gray(RGB); J = dct2(I); imshow(log(abs(J)),[]), colormap(jet(64)), colorbar J(abs(J) < 10) = 0; K = idct2(J); figure,imshow(I) figure,imshow(K,[0 255])