next up previous
Next: Some Existing CBR Systems/Applications Up: CBR in Image and Previous: A Note on Edge

Implementation of the gradient-based edge detection

1.
The partial derivative images can be generated using simple edge operators (masks consisting of 1 and -1).

2.
If S(x, y) (the edge magnitude at (x, y)) is greater than a certain threshold value, then an edge is detected at (x, y), its corresponding edge direction is theta.


Dave Marshall
10/4/2001