Why can fourier transform be used for image recognization while being sensitive to noises?

Posted by user198729 on Stack Overflow See other posts from Stack Overflow or by user198729
Published on 2010-04-05T15:53:44Z Indexed on 2010/04/05 16:53 UTC
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As we know Fourier Transform is sensitive to noises(like salt and peppers),

how can it still be used for image recognization?

Is there a FT expert here?

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