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How to find local extrema in matrices / 2D-arrays

OK, I thought if we would sweep an array subset across all locations and take a histogram of all subset maxima locations, only the real maxima will have a significant count. Seems to work just fine, try it!

 

 

 

(would need small adjustments for non-square inputs, but the idea stays the same)

 

 


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Thanks for your solution!

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