is there a version of Principle Component Analysis for images?

2 次查看(过去 30 天)
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

回答(3 个)

Sean de Wolski
Sean de Wolski 2013-4-15
doc pca
and
edit pca
  10 个评论
Sean de Wolski
Sean de Wolski 2013-4-15
Essentially. You need to horizontally concatenate all of your images first.
Mohamed Moawed
Mohamed Moawed 2013-4-15
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

请先登录,再进行评论。


Adam Filion
Adam Filion 2013-4-15
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 2013-4-15
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 个评论
Image Analyst
Image Analyst 2013-4-16
Sure, you could do it. Would that be useful to you? Why do you want PCA component images anyway?
Mohamed Moawed
Mohamed Moawed 2013-4-16
i want it to Analyze some fMRI cross-sectional brain images to early diagnosis Alzahimar Disease

请先登录,再进行评论。

类别

Help CenterFile Exchange 中查找有关 Dimensionality Reduction and Feature Extraction 的更多信息

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by