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Fast local contrast calculations? [message #86294]

Wed, 23 October 2013 11:28

kagoldberg
Messages: 26
Registered: November 2012

Junior Member

I'm looking for a quick way to calculate local contrast across a (2048,2048) image.
The end result could be a 64x64 element array, for example, and that would be fine.

Speed-wise, calculating local averages with rebin() are lightning fast. Even median(image,N) is pretty fast. But is there a similar high-speed way to get minimum and maximum values within each 'tile' without having to write a loop? It's as though I need a rebin_min() and rebin_max() where the min and max values are preserved within the sampled output array.

I'd love to hear any suggestions. Thanks, Ken

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[Message index]

		Fast local contrast calculations? By: kagoldberg on Wed, 23 October 2013 11:28
		Re: Fast local contrast calculations? By: Moritz Fischer on Wed, 23 October 2013 22:33
		Re: Fast local contrast calculations? By: kagoldberg on Thu, 24 October 2013 20:35

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