how can I show the denoised image after applying pca to a noisy image.

im=imread('cameraman.tif'); im1=imresize(im,[50,50]); im=double(im1); figure(1);imshow(im,[]); sig=10; noi=sig*randn(size(im)); data=im+noi; figure(2);imshow(data,[]);

[m,n]=size(data);

mn = mean(data,2); data = data-repmat(mn,1,n); covari=data*data'/n-1; [PC,V] = eig(covari); diav = diag(V); [junk, rindices] = sort(-1*diav); V = diav(rindices); PC = PC(:,rindices);

[Image Analyst]

http://www.mathworks.com/matlabcentral/answers/13205-tutorial-how-to-format-your-question-with-markup

In this uncommented, unformatted code, what is the denoised image? Which variable and what is its size? To show it you'd use imshow().

[Shaveta Arora]

im=imread('cameraman.tif'); 
im1=imresize(im,[50,50]); 
im=double(im1); 
figure(1);imshow(im,[]); 
sig=10; 
noi=sig*randn(size(im)); 
data=im+noi; %noised image
figure(2);
imshow(data,[]);

[m,n]=size(data);

mn = mean(data,2);
 data = data-repmat(mn,1,n); 
covari=data*data'/n-1; 
[PC,V] = eig(covari); 
diav = diag(V); 
[junk, rindices] = sort(-1*diav); 
V = diav(rindices);
 PC = PC(:,rindices);

[Shaveta Arora]

PC represents principal components of noisy image i.e data. Now pls help me how to get the image from these PCs.

Answer 1

[Image Analyst]

figure;
imshow(PC, [], 'InitialMagnification', 1600);
title('PC Image', 'FontSize', 20);

[Yadi Yang]

This is not working....

[Image Analyst]

@Yadi Yang it should work. If you need help, start a new discussion after you read this:

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