Title :
Evaluating the range flow motion constraint
Author :
Spies, Hagen ; Barron, John L.
Author_Institution :
Res. Center Julich, Germany
Abstract :
The instantaneous three-dimensional velocity field of a moving surface can be computed from a sequence of dense range data sets. Here we discuss the computation of the underlying motion constraint equation. This involves the evaluation of derivatives of the depth coordinate with respect to the other world coordinates. As these are not evenly sampled the sampling has to be taken into account explicitly. We quantitatively compare four methods to compute derivatives based on the validity of the resulting constraint equation.
Keywords :
estimation theory; image reconstruction; image sequences; least squares approximations; motion estimation; 3D velocity field; deformable surface recovery; dense range data sets; depth coordinate; image sequence; least squares approximation; moving surface; range flow motion constraint; sampling; Brightness; Computer science; Equations; Finite element methods; Least squares methods; Optical filters; Optical sensors; Sampling methods; Surface fitting; Taylor series;
Conference_Titel :
Pattern Recognition, 2002. Proceedings. 16th International Conference on
Print_ISBN :
0-7695-1695-X
DOI :
10.1109/ICPR.2002.1047990
