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[edit] To do

• handling variations in facial expression and lighting conditions
• other applications of eigenimaging- e.g., handwriting, voice, medical

As a mathematician, I think the first line is nonsense:

"Eigenfaces are eigenvectors in the high-dimensional vector space of possible faces of human beings."

You can't have eigenvectors without first defining an operator for which they are eigenvectors, see eigenvector. Without an operator, saying that a vector is an eigenvector has exactly zero meaning. - Andre Engels 22:01, 17 May 2004 (UTC)

I agree with you, eigenfaces are more a basis than eigenvectors.

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I hope what I've done with that secon paragraph is ok. I understand eigenvectors and I've heard of eigenfaces before, but I didn't understand that first paragraph at all. My explanation is very hand-wavy, so feel free to make it more accurate (but keep it readable for non-mathematicians). - G 16:10, 20 May 2004 (UTC)

I agree; the first paragraph as it now appears is somewhat vague. Maybe I'll do something with it at some point. Michael Hardy 21:34, 20 May 2004 (UTC)