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How to increase the thickness or darkness of edge after edge detection?

asked 2016-06-17 05:37:15 -0600

BaKa gravatar image

After using Laplacian operator for edge detection, i find that the edge is too thin, May i ask if there are ways to increase the thinkness or darkness in order to sharpen the edge detected?

Image after bitwise not operator:

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You could try to compute the difference of gaussian, with different kernel size, you should be able to detect edges of different size.

Eduardo gravatar imageEduardo ( 2016-06-17 09:05:00 -0600 )edit

I am satisfy with the result of edge found for this kernel size, but what i want to do is just make the edge found more clearly shown

BaKa gravatar imageBaKa ( 2016-06-17 10:22:19 -0600 )edit

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answered 2016-06-17 10:19:25 -0600

Since your image has black edges against white background, you can try an erode operation which takes the minimum value of every block.

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answered 2016-06-17 11:42:57 -0600

Sum_89 gravatar image

You can try dilating the image, worked pretty well on Canny edge detection results. Also remember it might amplify noise too

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Asked: 2016-06-17 05:37:15 -0600

Seen: 4,382 times

Last updated: Jun 17 '16