is there a version of Principle Component Analysis for images?

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hello everybody, i want to ask about Principle Component Analysis, a tool used for data analysis
is there a version for PCA that is used for analysis the images?
and i want a source code and some examples for that
thanks for your help

Answers (3)

Sean de Wolski
Sean de Wolski on 15 Apr 2013
doc pca
and
edit pca
  10 Comments
Mohamed Moawed
Mohamed Moawed on 15 Apr 2013
i = imread ('pout.tif'); x = i( : ); y = princomp(x); x = im2double (x); y = princomp(x); imshow (y)
i get no output!!!
what is the wrong here

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Adam Filion
Adam Filion on 15 Apr 2013
I don't know much PCA myself, but I know we have some built-in tools in Statistics and Wavelet toolboxes that may be of use:
There are also a number of entries on the File Exchange for PCA:

Image Analyst
Image Analyst on 15 Apr 2013
The most famous application of PCA to images is eigenfaces: http://en.wikipedia.org/wiki/Eigenface You can essentially construct any face image by a weighted sum of eigenface (PCA) images.
  3 Comments
Mohamed Moawed
Mohamed Moawed on 16 Apr 2013
i want it to Analyze some fMRI cross-sectional brain images to early diagnosis Alzahimar Disease

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