Most computer vision systems use one-dimensional operators to calculate the curvature of boundaries or image contours. However, the more sophisticated biological systems use two-dimensional operators. Here we analyze how curvature can be computed by using two-dimensional operators and show the relation of this approach to the one-dimensional methods currently in use.
© 1988 Optical Society of America
Jan J. Koenderink and Whitman Richards, "Two-dimensional curvature operators," J. Opt. Soc. Am. A 5, 1136-1141 (1988)