how to find a local minima for a continuous waveform ?
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I am working on image processing. I want to find the local minima of a particular area in an image.
Thank you in advance.
回答（2 个）
John Petersen
2012-8-8
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min(min(X))
2 个评论
Image Analyst
2012-8-8
That's a global min value, not a local min.
John Petersen
2012-11-2
not if X is limited to the area of interest. but it does have to be rectangular-ish.
Image Analyst
2012-8-8
You can find local min using the imregionalmin() function to produce a binary image of where the local mins are.
binaryImage = imregionalmin(grayImage);
Use find() or regionprops() if you want the row and column coordinates.
[rows columns] = find(binaryImage);
Use indexing if you want to know what the values at those min locations are.
localMinGrayValues = grayImage(binaryImage);
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2012-8-8
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