how to detect the widest peak of a histogram?

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neda 2013-5-20

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dear all, I have a histogram of an image that for detecting a certain point in that image I need to detect the center of the widest peak of this histogram.Can anyone help about this issue?

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Amith Kamath 2013-5-20

could you elaborate on 'center of the widest peak'? It is always helpful to know what you have already tried as well.

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Answer 1

Image Analyst 2013-5-21

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The definition of a "peak" is not so straightforward, especially when you have noise. Does that little noise peak on the shoulder of a bigger peak mean that that hump is now actually two peaks instead of one big one with a little bit of noise?

Do you have the Signal Processing Toolbox? If so play around with findpeaks(). Or else search the File Exchange - there are several peak detectors in there I believe.

Feel free to post your image or a screenshot of your histogram if you think that would help us help you. You can post here http://snag.gy