How to find the maximum peaks from histogram ?

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Priyanka Roy
Priyanka Roy 2015-10-23
回答： Image Analyst 2015-10-23
How can i find the maximum peaks from a histogram. I have tried findpeaks() function but it is giving large number of peak values.
Here image1 is the histogram of an image where in image2 i have pointed the peaks which are the maximum peaks. how can i find only the maximum peaks ?
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Adam
Adam 2015-10-23
findpeaks has plenty of options you can set to limit the number of peaks. It also returns both the peak values and their locations allowing you to filter them yourself based on an amplitude threshold if that is what you want.
You have to define what you want to count as a 'peak' though. The thresholds you can pass to findpeaks account for many of these.

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Image Analyst
Image Analyst 2015-10-23
If you have the Statistics and Machine Learning Toolbox, you can use ksdensity() to get a smoother estimate of the pdf, then use findpeaks() on that. Or if you have the Signal Processing Toolbox, run the hist through sgolayfilt() to get a smoothed histogram, then run findpeaks on that.

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