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04-20-2015 09:17 AM
Hi all,
i would like to ask any guidelines/ help tips regarding real time straight line detection via usb webcam with myrio 1900. i cant get any lines on frame which inside the ROI rectangle. By the way , im jz a newbie using these labview & myrio. any tips, guidelines, and solution ?
Thank you.
regards
vincent.
04-24-2015 06:20 AM - edited 04-24-2015 06:26 AM
Hello,
you can try using the Hough line transformation. Assuming you are trying to detect the curtain edge:
Basic Hough line transform:
Probabilistic Hough line transform:
The processing for both takes ~6 ms (I have a (low)mid range computer).
You can find the code and examples here:
You can also do it in Labview - I think it's called "IMAQ Find Straight edges -> Hough Edge Rake". It is also based on Hough line transform.
You are probably detecting the edges, but not displaying them correctly? Or you just need to setup the parameters based on your setup. I have Labview 2013, so I cannot check your code.
Best regards,
K
04-28-2015 04:54 AM - edited 04-28-2015 04:54 AM
First of all , thanks Klemen for the guides that provided for my problems. Ya, im trying to detecting those edges but not sure whether im going on the right track since i manage to have 0 errors and warning from my VI but i dont have those red line appear on the image. Which VI i should add to have the red line?
Ive try convert the version to 13.0 v2 hope that can ease the difficulties.
Thank you
Regards
Vincent.
04-28-2015 05:11 AM
You have overlay line.vi.
04-28-2015 05:18 AM
Try this
04-30-2015 05:55 PM
Hi guys,
I have problem with image acquisation in real time with a NI smart camera 1762 !!
i face retard of 2 seconds!!