MATLAB实现频域平滑滤波以及图像去噪代码运行出错（急等）

swallowx

下面的代码是我在网上搜的，运行以后提示出错，请各位帮忙看看。
% the SF filter is unselective to orientation (doughnut-shaped in the SF
% domain).
[FileName,PathName,FilterIndex] = uigetfile ;
filename = fullfile(PathName, FileName) ;
[X map] = imread(filename, fmt); % read image
L = double(X); % transform to double
%%%%%%%%%%%%% need to add (-1)x+y to L
% calculate the number of points for FFT (power of 2)
fftsize = 2 .^ ceil(log2(size(L)));
% 2d fft
Y = fft2(X, fftsize(1), fftsize (2));
Y = fftshift(Y);
% obtain frequency (cycles/pixel)
f0 = floor([m n] / 2) + 1;
fy = ((m: -1: 1) - f0(1) + 1) / m;
fx = ((1: n) - f0(2)) / n;
[mfx mfy] = meshgrid(fx, fy);
% calculate radius
SF = sqrt(mfx .^ 2 + mfy .^ 2);
% SF-bandpass and orientation-unselective filter
filt = SF > k0;
A_filtered = filt .* A; % SF filtering
L_filtered = real(ifft2(ifftshift(A_filtered))); % IFFT
L_filtered = L_filtered(1: size(L, 1), 1: size(L, 2));
%%%%%%%%%%need to add (-1)x + y to L_filtered
% show
figure(1);
clf reset;
colormap gray;
% plot image
subplot(2, 2, 1);
imagesc(L);
colorbar;
axis square;
set(gca, 'TickDir', 'out');
title('original image');
xlabel('x');
ylabel('y');
imwrite(L, fullfile(FilePath, 'original image.bmp'), 'bmp') ;
% plot amplitude
A = abs(A);
A = log10(A);
% spectral amplitude
subplot(2, 2, 2);
imagesc(fx, fy, A);
axis xy;
axis square;
set(gca, 'TickDir', 'out');
title('amplitude spectrum');
xlabel('fx (cyc/pix)');
ylabel('fy (cyc/pix)');
imwrite(A, fullfile(FilePath, 'amplitude spectrum.bmp'), 'bmp') ;
% filter in the SF domain
subplot(2, 2, 3);
imagesc(fx, fy, filt);
axis xy;
axis square;
set(gca, 'TickDir', 'out');
title('filter in the SF domain');
xlabel('fx (cyc/pix)');
ylabel('fy (cyc/pix)');
imwrite(filt, fullfile(FilePath, 'filter in SF.bmp'), 'bmp') ;

% filtered image
subplot(2, 2, 4);
imagesc(L_filtered);
colorbar;
axis square;
set(gca, 'TickDir', 'out');
title('filtered image');
xlabel('x');
ylabel('y');
imwrite(filtered, fullfile(FilePath, 'filtered image.bmp'), 'bmp');

%%%%%%%%%%%%%%%%%median filter%%%%%%%%%%%%%%%%
[FileName,PathName,FilterIndex] = uigetfile ;
filename = fullfile(PathName, FileName) ;
[LNoise map] = imread(filename, fmt); % read image
L = medfilt2(LNoise, [3 3]); % remove the noise with 3*3 block
figure ;
imshow(LNoise) ;
title('image before fitlering') ;
figure
imshow(L)
title('filtered image') ;
imwrite(FilePath, 'filtered image.bmp', bmp)


提示错误：??? Undefined function or variable 'fmt'.
??? Undefined function or variable "m".

aabbuutt1

程序只是一个基本框架，具体情况具体修改。
关于读图片那句，你可以修改。例如修改为：[X map] = imread('C:\Documents and Settings\\未命名1.bmp');fmt应该是format的简写，意思应该是要你写出图片格式，即文件后缀。
还有 你的 m n 确实没有定义，f0 = floor([m n] / 2) + 1; 这一句肯定是要出错的。
读出来的文件即上面X的值应该是3维的，f0 = floor([m n] / 2) + 1是不是要取X的二维值然后进行四舍五入？
因为我不清楚你程序的功能，只能分析这么多，希望对你有帮助

swallowx

谢谢，在研究中

243009558he

回复 1# swallowx


    我最近也要用到这个代码，求解。能不能发我邮箱一份，谢谢
hezhaokai@126.com

hjy_cool

学习，谢谢！！！！！！！