2-Dimensional Principle Component Analysis

2013 4 27
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更新时间：2017 2 3
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Hi all
I want to extract the feature vector from image using 2DPCA.
If I use the direct matlab function princomp let sya
img=imread('myimage.bmp'); img=double(rgb2gray(img)); [coeff score latent tsquare]=princomp(img);
then which one is the feature vector in this case?
princomp function is same like the linear transformation like y=Ax.? where A is matrix of mxn and x is n-dimensonal unitary column vector.Bur if I apply manually y is column feature vector.why?
thanks

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function 'princomp' use for 'PCA' not '2DPCA' and this function removed and you can use function 'pca'.

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