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relative peak height - background

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Bran
Bran 2014-2-18
评论： Bran 2014-2-18
I have a spectrum and I am trying to find the relative height of the biggest peak. I was wondering if Matlab had an inbuilt function to do this or if there is a way I can work out the background height and then apply the formula: (hp - hb)/hb
Any help would be greatly appreciated

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回答（1 个）

Image Analyst
Image Analyst 2014-2-18
There is a findpeaks() function in the Signal Processing Toolbox. How you define the "base" or background of the peak is not so straightforward, especially in 2 dimensions. I think you're on your own for that. Are your signals 1-D or 2-D? For 2D you can look at watershed() or imhmax() but I'm not entirely happy with those.
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Bran
Bran 2014-2-18
Oh thank you so much for your help. Well my data is just an FFT of acceleration data and so is 1D

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