Object

toolkit.filtering.whitening

WhitenNaturalImage

Related Doc: package whitening

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object WhitenNaturalImage

Whiten a natural image.

Natural images have a power spectrum well approximated by 1 / f**2. This function flattens that spectrum to facilitate further processing. The algorithm is from Bruno Olshausen:

http://redwood.berkeley.edu/bruno/npb261b/lab2/lab2.html

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  4. def apply(image: libcog.ScalarField): libcog.ScalarField

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    Whiten a natural image.

    Whiten a natural image.

    XXX A bug in normalized convolution must be fixed for this to work correctly.

    image

    Image to be whitened

    returns

    Whitened image.

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