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how to find a local minima for a continuous waveform ?

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v gnanaprakash
v gnanaprakash 2012-8-8
I am working on image processing. I want to find the local minima of a particular area in an image.
Thank you in advance.

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回答（2 个）

John Petersen
John Petersen 2012-8-8
min(min(X))
Image Analyst
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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