Sobel Edge Detection Filter
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.[more]
It is one of the image segmentation techniques used in Computer Vision (CV) software in its initial preprocessing steps called early vision. After the early vision preprocessing a CV system can, for example, use artificial intelligence to identify, classify, or count objects in an image.[less]
Sobel gradient edge operator:
Reference: D. A. Forsyth and J. Ponce, Computer Vision: A Modern Approach, Upper Saddle River, NJ: Prentice Hall, 2003.