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How can i make feature extraction using PCA using matlab code on galaxy image ?

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Aya Ahmed
Aya Ahmed on 4 Mar 2020
Commented: Aya Ahmed on 6 Mar 2020
Please help me ..
i want to make feature extraction using PCA ,using matlab code on galaxy image like that >>
I was wondering if anyone could help me with a few steps or even code to make feature extraction from images .
I would like to extract the features of galaxy images and then classify them in the classification learner app.
The data I have is a set of galaxy imagse.
The aim is to extract the features and then compare them in the classification app with each other.
Any help is appreciated!
i want to know how pca work ? does it work in gray images only ??
Thanks ..

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Aya Ahmed
Aya Ahmed on 5 Mar 2020
I classify galaxies images into 3 types of galaxies.. spiral, irrigular , elliptical . and these are the steps that i make
1-i have done image preprocessing on the images.
2- I want to make a feature extraction to the images in order to insert it to the classifier and through it ,it can determine what kind of galaxies they are.
this is the phase2 that i want to make >>
i make the step A. Morphological Features of galaxy
and this is the result :-
step B. Principal Component Analysis (PCA) Features
i want to make it .

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