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%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(

/* * copyright (c) 2006 Michael Niedermayer * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public

%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(

RGB = imread('autumn.tif'); % 读入原始图像 I = rgb2gray(RGB); % 将彩色图像转化为灰度图像，以便进行DCT变换。 J = dct2(I); % DCT变换 imshow(log(abs(J)),[]), % 显示变换结果 colormap(jet(64)),

%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

/* * copyright (c) 2006 Michael Niedermayer * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public

%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(

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])

/* ***** BEGIN LICENSE BLOCK ***** * Version: RCSL 1.0/RPSL 1.0 * * Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved. * * The contents of this file, and the