Peak Detection

[jumbojetjames]

hi all,

I am searching for a good and fast algorithm (or a point to begin developing) to find the peaks in a histogram. the histogram is not clean, may be it has an offset-voltage and is not regular. any hint or idea?

best regards

Simon

[Hillman]

Hi Simon,

I have edited a Labview example on histograms to contain peak detection. Seems to work well - its attached.

As for implementation, if Labview can do it - it should be possible in LabWindows *fingers crossed*. But I know its not much of an algorithm...may have a look inside the vi?

Let me know what you think, if you have any problems with implementing it,

Thanks



Message Edited by Hillman on 08-08-2008 10:43 AM

[cdk52]

Hello Simon.

If you have the CVI Full Development System, you could use the PeakDetector() function from the Advanced Analysis Library.

According to the function panel help, PeakDetector "Finds the location, amplitude, and second derivatives of peaks or valleys in the input array".

Good luck.

Colin.



Message Edited by cdk52 on 08-09-2008 12:32 PM

[jumbojetjames]

hallo,

thanks for the hint, I tested the PeakDetector() from the Advanced Analysis Library. It works fine. the only problem is, that I have to find and to describe not only the x/y-value-pair of a peak, but all the curve-parameters of the peak. so I had to analyse the first derivation in order to find the start- and ending point of the "peak". but It seems to work.

thanks and best regards

Simon