Optical flow estimation via steered-L1 norm

Zayouna, Ammar, Comley, Richard A. ORCID logoORCID: https://orcid.org/0000-0003-0265-1010 and Shi, Daming (2016) Optical flow estimation via steered-L1 norm. Pan, Zhigeng and Skala, Vaclav, eds. Proceedings: 24th International Conference in Central Europe on Computer Graphics, Visualization and Computer Vision. In: 24th International Conference in Central Europe on Computer Graphics, Visualization and Computer Vision, 30 May - 03 Jun 2016, Plzen, Czech Republic. ISBN 9788086943572. ISSN 2464-4617 [Conference or Workshop Item]

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Global variational methods for estimating optical flow are among the best performing methods due to the subpixel accuracy and the ‘fill-in’ effect they provide. The fill-in effect allows optical flow displacements to be estimated even in low and untextured areas of the image. The estimation of such displacements are induced by the smoothness term. The L1 norm provides a robust regularisation term for the optical flow energy function with a very good performance for edge-preserving. However this norm suffers from several issues, among these is the isotropic nature of this norm which reduces the fill-in effect and eventually the accuracy of estimation in areas near motion boundaries. In this paper we propose an enhancement to the L1 norm that improves the fill-in effect for this smoothness term. In order to do this we analyse the structure tensor matrix and use its eigenvectors to steer the smoothness term into components that are ‘orthogonal to’ and ‘aligned with’ image structures. This is done in primal-dual formulation. Results show a reduced end-point error and improved accuracy compared to the conventional L1 norm.

Item Type: Conference or Workshop Item (Paper)
Additional Information: ISSN (CD-ROM): 2464-4625
Research Areas: A. > School of Science and Technology > Computer and Communications Engineering
Item ID: 28643
Notes on copyright: The published proceedings are reproduced in this repository with permission.
This work is copyrighted; however all the material can be freely used for educational and research purposes if publication properly cited. The publisher, the authors and the editors believe that the content is correct and accurate at the publication date. The editor, the authors and the editors cannot take any responsibility for errors and mistakes that may have been taken.
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Depositing User: Richard Comley
Date Deposited: 19 Dec 2019 15:35
Last Modified: 22 Jan 2020 19:09
URI: https://eprints.mdx.ac.uk/id/eprint/28643

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