Edge operator shows both rising and falling edge

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Max Sekundo
Max Sekundo on 26 Jan 2021
Answered: Image Analyst on 1 Feb 2021
Im trying to detect the rising edge of a datastream. My code looks as follows:
data = importdata('myfile');
Trigger = data.data(:,1)
L = logical(Trigger)
which results in the following figure.
As I only want the rising edge the edge() operator from the image processing package should give me just that.
but for some reason it ends up like this:
M = edge(L);
what am i doing wrong?
thanks

Answers (2)

Shubham Rawat
Shubham Rawat on 1 Feb 2021
Hi Max,
Edge functionality is used to detect edges(boundaries) in an image. You may look into the documentation here:
To detect rising or falling edge in data:
Hope this Helps!

Image Analyst
Image Analyst on 1 Feb 2021
Try this trick of using strfind():
risingEdgeIndexes = strfind(L, [0, 1]) + 1;

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