Imperfections in the canny edge detection

[agator2]

There are imperfections in the area just inside of the detected edge. I have seen this in multiple programs and am only now looking for solutions. Thank you greatly in advance.

[Taki1999]

No edge detection algorithm is going to be perfect all the time.

Looks like you might be able to perform a few dilation operations to remove your artifacts in this case though.

[agator2]

A dilation looses the precision of the detection. Is there no way to remove simply the artifacts?

[Taki1999]

What sort of precision do you really need? I don't have the Vision VIs on the computer I'm at now, but there should be some configurable filter widths and thresholds on the Canny detector which you might need to adjust. You also might be able to find something in the Particle Analysis VIs which might help.

[Kimberly_Wenger_Austin]

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!

Kim W.