Find all peak and display on waveform graph

[Ngunga]

Hellow friends,

I am a newbie in LabVIEW. I use LabVIEW 15.0.1 and I am currently working on the program that analyses nine ROIs from the series of recorded images. I am able to display the waveforms from every selected ROI. I can also pre-process the signals, apply FFT and display FFT results.  But I can not display the Heart Rate from the Peak detector. I don't know what goes wrong with my coding.

I have attached my vi for further assistance. Please help.

Thank you!

johnbakunda@yahoo.com 

[GerdW]

Hi John,

why don't you use a simple peak detector?

I made a constant from one of your graphs, then applied a peak detector to find the peaks.

From peak locations and your sample rate you can calculate the heart beat frequency!

Btw. you should write your email address in public. You might get more SPAM than expected afterwards…

[Ngunga]

Hi, GerW!

Thank you for the quick feedback and caution about my email address.  I will share the feedback of your suggested solution ASAP!

Regards;

John