DIRECTIONAL DERIVATIVE;
ZERO CROSSINGS;
AUTHENTIC EDGES;
D O I:
10.1016/0167-8655(93)90106-N
中图分类号:
TP18 [人工智能理论];
学科分类号:
081104 ;
0812 ;
0835 ;
1405 ;
摘要:
We give an easy derivation of the third order directional derivative in the direction of the gradient of the intensity function. The obtained formula is a correction of the formula found by Clark (1989).