Canny edge robolab

Hello everyone,
I am using robolab 2.54 for labview 7.0. I am currently doing a project which need to use Canny Edge Detection.
I am wondering who can manually write a Canny Edge Vi? (not using IMAQ)
The robolab does not provide Canny Edge Vi, but it has some Vi such as Gussian, Sober filter.
Please Help.
Thanks
P.S. I have looked Canny Edge tutorial page, the only thing I could not implement is "non-maximal suppression".
I cannot not download higher vision Labview to do my project since my lecturer will not open the project file (he uses robolab)

This is the advance pic Vi I can use, Just have a look
Message Edited by SHW on 05-21-2009 06:07 AM

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Anyone has a canny edge detector vi that can be opened in Labview 7.0??

Hi,
Anyone has a canny edge detector vi that can be opened in Labview 7.0??
Thanks and many thanks.!

Hi aaz,
If you are using RoboLab I would suggest posting to the Lego Mindstorms Forums as
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Only what I found out when I googled for edge detection techniques once and found several helpful articles and tutorials.
You should try it. Google is a really great search engine. You can use it to search for information.

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Attachments:
dafsdf.png ‏3 KB
FGDFG.png ‏215 KB

Hi agator2,
To reiterate Taki1999's post, you can always threshold the image before you do an edge detection to try and get a more precise edge. Your image looks like it is fading colors from the darker color to the lighter color. The more you can threshold this image to more precise edges, the less imperfections you will have. I hope this helps!
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Solved!
Go to Solution.
Attachments:
edge.png ‏3 KB

Hello aveo,
how about performing particle measurements after Canny (please see the attached code). Use connectivity 8, which searches for all adjecent pixels if they are a part of the same line segment (see the image below):
Ni Vision Concepts manual:
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M

Hello,
I am a bit familiar with OpenCV, so I know Mat is not a datatype, but a class.
I suspect that you did not properly look at the examples at the link I provided. But anyway, here is an example of Canny edge detection .dll (or rather the source code that is used to build the .dll). Plese see the attachment.
And here is the result:
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https://decibel.ni.com/content/blogs/kl3m3n
"Kudos: Users may give one another Kudos on the forums for posts that they found particularly helpful or insightful."
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test.cpp ‏1 KB

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