Differential Operators for Edge Detection
Name
AI_WP_252.pdf
Description
Main article
Size
329.3 KB
Format
Adobe PDF
Checksum (MD5)
840ebc556b73e9b751645b2cd7b19d25
Author(s)
Torre, V.
Poggio, Tomaso A
Date Issued
March 1983
Publisher
MIT Artificial Intelligence Laboratory
Series/Report no.
MIT Artificial Intelligence Laboratory Working Papers, WP-252
Abstract
We present several results characterizing two differential operators used for edge detection: the Laplacian and the second directional derivative along the gradient. In particular, (a)we give conditions for coincidence of the zeros of the two operators, and (b) we show that the second derivative along the gradient has the same zeros of the normal curvature in the gradient direction.
Biological implications are also discussed. An experiment is suggested to test which of the two operators may be used by the human visual system.
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