how to change compression level in PCA?

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how to change compression in pca and how to find the compression ratio in pca...

Accepted Answer

Walter Roberson
Walter Roberson on 21 Feb 2014
pca is not in itself a compression scheme. pca is sometimes used for compression by finding the vectors that are most responsible for variation in the image and discarding some of the vectors that are least responsible (which are closer to 0.) To change the compression level, discard more or fewer components.

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