Use MATLAB's own function princomp () to calculate the principal component. When the dimension is very high, the memory exhaustion error usually occurs, even if the memory is enough, it is very time-consuming. Fast PCA can speed up the computation process and reduce memory footprint, making it easier to calculate the larger image principal components.

Filename	Size	Update
PCA\PCA.m	731	2018-05-03
PCA\approx.m	211	2018-05-03
PCA\fastPCA.m	612	2018-05-03
PCA\lena.tiff	320820	2018-05-03
PCA\visualize_pc.m	293	2018-05-03
PCA	0	2018-05-03

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