Edge Detectors

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Saad Abdullah
Saad Abdullah on 22 Dec 2011
Which one is robust to detect weak edges while going unresponsive to noise? Sobel or Canny edge detectors?

Accepted Answer

Naz on 22 Dec 2011
I would recommend you to try out all and see which one works better in your case. I had to do it once and I applied edge enhancement algorithms before using edge detection. In the following paper http://staff.science.uva.nl/~rein/nldiffusionweb/ named nldiffusioncode.pdf you can read about three algorithms they developed. The code is free and the link is matlab.zip. I could not find the actual webpage.
I also used adapthisteq function from matlab to enhance contrast before before edge enhancement and detection

More Answers (2)

Sean de Wolski
Sean de Wolski on 22 Dec 2011
Perhaps you could try testing and comparing them for your application:
doc edge

David Young
David Young on 22 Dec 2011
  1 Comment
Saad Abdullah
Saad Abdullah on 22 Dec 2011
yeah i was also thinking about Canny, but I did not know whether it is unresponsive to noise or not. It is because when i set threshold value to 0.02, it shows more noise than sobel.

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