How can I use Principal Component Analysis (PCA) to reduce features?
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wisam kh on 28 Sep 2018
Commented: Image Analyst on 30 Sep 2018
I extract image features using the Gabor filter.
The number of features is large for each image (5670 X 1) row and single column. How can I use Principal Component Analysis to reduce features?
Image Analyst on 28 Sep 2018
Call PCA and then only keep the PC's that you want, like 5 or 10 of them. So, how does a Gabor filter give 5670 features? Are you saying each pixel is a feature?
Image Analyst on 30 Sep 2018
imgaborfilt() gives you two images from every image you give it. Where are your 5670 or 40 different features coming from if they're not the individual pixels in either the magnitude or phase Gabor images?
You can't run pca on just one 1-d vector. It doesn't make sense. If you have 40 features, then you'd need those 40 measurements from at least 40 different images to get PCs.
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