A new multiconstraint approach to the estimation of optical flow is presented, which is based on constraint relaxation in the velocity space. An architecture for a parallel implementation of the algorithm is suggested, in which relaxation is accomplished by a mesh grid of loosely coupled simple computational units, one for each image point where optical flow has to be computed. Optical flow smoothing is performed by a vector median filter, whose nonlinear nature is helpful in preserving motion boundaries. Results on both synthetic and real-world sequences are presented, which demonstrate that the algorithm behaves well in the presence of noise and occlusions.
OPTICAL FLOW THROUGH RELAXATION IN THE VELOCITY SPACE / A. DEL BIMBO; C. COLOMBO; S. SANTINI. - In: PATTERN RECOGNITION LETTERS. - ISSN 0167-8655. - STAMPA. - 15:(1994), pp. 373-382. [10.1016/0167-8655(94)90086-8]
OPTICAL FLOW THROUGH RELAXATION IN THE VELOCITY SPACE
DEL BIMBO, ALBERTO;COLOMBO, CARLO;
1994
Abstract
A new multiconstraint approach to the estimation of optical flow is presented, which is based on constraint relaxation in the velocity space. An architecture for a parallel implementation of the algorithm is suggested, in which relaxation is accomplished by a mesh grid of loosely coupled simple computational units, one for each image point where optical flow has to be computed. Optical flow smoothing is performed by a vector median filter, whose nonlinear nature is helpful in preserving motion boundaries. Results on both synthetic and real-world sequences are presented, which demonstrate that the algorithm behaves well in the presence of noise and occlusions.I documenti in FLORE sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.