Sobel Edge Detection Filter
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The Sobel filter can be used for edge detection. There are two mask matrices that convolve with the image data (matrix). The images are grayscale.
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Contributed by: Daniel de Souza Carvalho (March 2011)
Open content licensed under CC BY-NC-SA
Snapshots
Details
Sobel gradient edge operator:
Vertical matrix:
Horizontal matrix:
Reference: D. A. Forsyth and J. Ponce, Computer Vision: A Modern Approach, Upper Saddle River, NJ: Prentice Hall, 2003.
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