Title :
Estimation of motion vector fields using tensor field filtering
Author :
Westin, Carl-Fredrik ; Knutsson, Hans
Author_Institution :
Dept. of Electr. Eng., Linkoping Univ., Sweden
Abstract :
This paper presents a method for computation of two-dimensional motion vector fields from an image sequence. The magnitudes from a set of spatio-temporal quadrature filters are combined into a tensor description. The shape of the tensors describe locally the structure of the spatio-temporal neighbourhood and provides information about local velocity and if true flow or only normal flow is present. It is shown how normal flow estimates are combined into a true flow using linear filtering on this tensor field description
Keywords :
estimation theory; filtering theory; image sequences; low-pass filters; motion estimation; quadrature mirror filters; tensors; image sequence; linear filtering; local velocity; low pass filtering; motion vector fields estimation; normal flow estimates; quadrature filter; spatio-temporal neighbourhood; spatio-temporal quadrature filters; tensor field description; tensor field filtering; tensors shape; true flow; two-dimensional motion vector fields; Computer vision; Equations; Filtering; Image motion analysis; Laboratories; Motion estimation; Nonlinear filters; Optical computing; Optical filters; Tensile stress;
Conference_Titel :
Image Processing, 1994. Proceedings. ICIP-94., IEEE International Conference
Conference_Location :
Austin, TX
Print_ISBN :
0-8186-6952-7
DOI :
10.1109/ICIP.1994.413567
