Title :
Detecting orientation discontinuities in range images by use of directional derivatives
Author_Institution :
CEA, CEN Fontenay-aux-Roses, France
fDate :
30 Aug-3 Sep 1992
Abstract :
The author exposes a step of the segmentation process of range images. Based upon an analogy between step edges and orientation discontinuities, it is proposed to detect surface orientation discontinuities by extrema of second directional derivatives or by zero crossings of third directional derivatives. A method is presented to compute derivatives up to the fourth order. Results obtained with these methods are shown for real range images
Keywords :
digital filters; edge detection; image segmentation; polynomials; directional derivatives; image segmentation; orientation discontinuities; polynomial approximation; range images; recursive filtering; smoothing filter; step edges; surface orientation discontinuities; zero crossings; Eigenvalues and eigenfunctions; Face detection; Filtering; Image edge detection; Image segmentation; Laplace equations; Polynomials; Recursive estimation; Robots;
Conference_Titel :
Pattern Recognition, 1992. Vol.III. Conference C: Image, Speech and Signal Analysis, Proceedings., 11th IAPR International Conference on
Conference_Location :
The Hague
Print_ISBN :
0-8186-2920-7
DOI :
10.1109/ICPR.1992.202023
