problem regarding edge detection

hi what are different parameters that effect edge detection on different edge detectors.

[Jürgen]

For Canny, Sobel , Prewitt these are explained in the help no? Of course other techniques like watershed or even erosion of dilation based technique can be used, your question is rather general, the best technique depends on the input image and the desired results

Answer 1

[Image Analyst]

We can't explain every edge detector out there - there are hundreds. Do you have a question about a particular one? A good way is to just experiment with an image, and vary the parameters and see what happens. Pick the parameter set that gives you the "best" output image.

[Algorithms Analyst]

Can you find the edges using 5 * 5 mask through sobel edge detection method?If so then let me know plz..Because I am able to find it in a 3*3 mask.

[Image Analyst]

I've never heard of a Sobel filter that's not 3x3. Of course you could make your own custom 5x5 filter that had similar weights, but why? You said you're able to find edges with the 3x3 so why do you want to try 5x5? Did the 3x3 really NOT find the edges you were interested in?

[Ryan]

If you need a 5 x 5 sobel mask, try Google. Here is the first link I found searching "Sobel 5 x 5": http://www.cim.mcgill.ca/~image529/TA529/Image529_99/assignments/edge_detection/references/sobel.htm