Question about finding pits of a matrix?

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Johny 2013-11-16

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https://ww2.mathworks.cn/matlabcentral/answers/106423-question-about-finding-pits-of-a-matrix

评论： Tara Wagoner 2023-4-5

采纳的回答： Matt J

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Image Analyst 2013-11-17

Johny - don't do that. Don't edit away your question. It really annoys people a lot.

Tara Wagoner 2023-4-5

haha

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Matt J 2013-11-16

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编辑：Matt J 2013-11-16

在 MATLAB Online 中打开

If I've understood what you're after, the whole task is doable in just a few lines,

 minval=min(map(:)); %minimum cell value
 pitmap=(map==minval); %all minima/pits
 pitmap([1,end],[1,end])=false;  %get rid of edge pits
 [pitrows,pitcols]=find(pitmap);   %pit coordinates

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Image Analyst 2013-11-16

I agree with Matt about using imregionalmin(). By the way, you might find this interesting: http://www.mathworks.com/matlabcentral/fileexchange/35452-finddepressions

Johny 2013-11-16

This looks promising It seems this mregionalmin function uses 8-connected neighborhoods for 2D images, but I have to take into account the points on the input matrix which are themselves the minimum, aka offset of (0,0) which means that it should scan for the local minimum within the cell itself as well. does Imregionalmin do this?

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