Keyphrases
- edge detection
- gradient direction
- image gradient
- step edges
- orientation histogram
- gradient magnitude
- gradient information
- edge orientation
- edge map
- edge information
- edge detector
- zero crossing
- gradient field
- weighted graph
- closed form
- directional derivatives
- disjoint paths
- edge points
- gradient method
- approximation methods
- data sets
- fidelity term
- efficient computation
- mumford shah model
- image processing
- learning algorithm
- genetic algorithm