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Regional maxima from python

asked 2013-03-13 05:26:37 -0500

jeanpat gravatar image

Hello, Is it possible to compute the regional maxima of a grey scaled image (8bits or more) ?

thank you

jp

(opencv 244 build from source, python 2.7)

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there's minMaxLoc, but that's global (for the whole img or roi you apply it on)

what do you mean by 'regional' ?

berak gravatar imageberak ( 2013-03-13 05:43:51 -0500 )edit

There a definition in Castleman, K : http://bit.ly/13VyHL7

If you think of an image as a landscape, regional maxima yields the local tops. This not the max value of the image. I have browsing again the documentation but that morphological operator doesn't seem to be implemented.

jeanpat gravatar imagejeanpat ( 2013-03-13 07:10:05 -0500 )edit

thanks for clarifying.

and i'd think so, too - no such thing in the library

berak gravatar imageberak ( 2013-03-13 07:31:59 -0500 )edit

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answered 2013-03-13 12:09:20 -0500

awknaust gravatar image

You'd have to do it by hand. You make a 2D filter which you slide across the image so that each pixel becomes 0 if it is not the maximum in the neighborhood and retains its value otherwise.

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Sounds like a kind of non-maxima suppression.

Guanta gravatar imageGuanta ( 2013-03-13 12:28:58 -0500 )edit
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Asked: 2013-03-13 05:26:37 -0500

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Last updated: Mar 13 '13