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Multiple constraints to compute optical flow

Tistarelli, Massimo (1996) Multiple constraints to compute optical flow. IEEE Transactions on Pattern Analysis and Machine Intelligence, Vol. 18 (12), p. 1243-1250. ISSN 0162-8828. Article.

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DOI: 10.1109/34.546260

Abstract

The computation of the optical flow field from an image sequence requires the definition of constraints on the temporal change of image features. In this paper, we consider the implications of using multiple constraints in the computational schema. In the first step, it is shown that differential constraints correspond to an implicit feature tracking. Therefore, the best results (either in terms of measurement accuracy, and speed in the computation) are obtained by selecting and applying the constraints which are best “tuned” to the particular image feature under consideration. Considering also multiple image points not only allows us to obtain a (locally) better estimate of the velocity field, but also to detect erroneous measurements due to discontinuities in the velocity field. Moreover, by hypothesizing a constant acceleration motion model, also the derivatives of the optical flow are computed. Several experiments are presented from real image sequences.

Item Type:Article
ID Code:2192
Status:Published
Refereed:Yes
Uncontrolled Keywords:Optical flow, velocity field, differential constraints, dynamic vision, motion analysis, image velocity, dynamic scene analysis, computer vision
Subjects:Area 09 - Ingegneria industriale e dell'informazione > ING-INF/05 Sistemi di elaborazione delle informazioni
Divisions:001 Università di Sassari > 01 Dipartimenti > Architettura e pianificazione
Publisher:IEEE Computer Society
ISSN:0162-8828
Publisher Policy:Depositato in conformità con la politica di copyright dell'Editore
Deposited On:18 Aug 2009 10:07

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