Calculating the Minimum and The Maximum of a Slidig Window
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Hello,
How would you create the fastest implementation to extract the Minimum and the Maximum of a Local Sliding Window over an image?
So far I used this:
localMaxImage = colfilt(inputImage, [winLength winLength], 'sliding', @max);
localMinImage = colfilt(inputImage, [winLength winLength], 'sliding', @min);
Yet it is really slow. I know I can use `imerode` and `imdilate`, Yet I'm looking for a toolbox free implementation. Thank You.
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José-Luis
2014-9-8
编辑:Image Analyst
2014-9-11
Royi, you have asked 23 questions in this forum so far and not accepted a single one. Have you had bad luck with your answers? If not, seeing that might make contributors here less inclined to help you.
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Matt J
2014-9-11
I've never used it, but this FEX contribution is MEX-driven, and so should be fast
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Anand
2014-9-11
What do you mean toolbox-free? colfilt is also from the Image Processing Toolbox. Can you use ordfilt2
localMaxImage = ordfilt2(inputImage, winLength^2, true(winLength));
localMinImage = ordfilt2(inputImage, 1 , true(winLength));
This should be faster than colfilt, but maybe you can't use it.
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