How can one extract feature from images using principal component analysis

The goal is to extract the principal components in an image and display the result in image form

Answer 1

[Image Analyst]

See my attached PCA image demo. You can then take one of the PC images and do something with it, like threshold it or whatever, to find features.

[ESTHER MONICA]

im getting error wat should i do

[begginer01]

Image Analyst...you mean to say like we can apply feature extraction techniques like GLCM, Fourier transform on PCA images? Please reply....

[Image Analyst]

Yes, you could.

[Munshida P]

how to calculate pca for more than 1 image? i have 400 images.

[Walter Roberson]

http://matlab.wikia.com/wiki/FAQ#How_can_I_process_a_sequence_of_files.3F

[Walter Roberson]

In the given above link, there is nothing about pca according to my question.

Correct, but the link tells you how to process a series of files. You would use the techniques there to load the data. Inside the loop, you would call pca() on the data you had loaded, and do whatever is appropriate with the results, either writing it to file or saving it in an array for later use in the program.

[Reshma Raju]

how to use pca for image enhancement?

[Image Analyst]

I don't think PCA is generally thought of as an enhancement method. Seems like you're not asking the question in the right way. I think you should ask which enhancement method you should use to achieve the desired appearance. What does your image look like, and what do you want it to look like?

[junyong hong]

a sweetest coding style I've ever gotten