Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/11279
Title: Direct estimation of the backward flow
Authors: Sánchez, Javier 
Salgado de la Nuez, Agustín Javier 
Monzón, Nelson 
UNESCO Clasification: 220990 Tratamiento digital. Imágenes
Keywords: Backward flow
Inverse optical flow
Back registration
Inverse mapping
Optical flow
Image registration
Occlusions
Disocclusions
Issue Date: 2013
Abstract: The aim of this work is to propose a new method for estimating the backward flow directly from the optical flow. We assume that the optical flow has already been computed and we need to estimate the inverse mapping. This mapping is not bijective due to the presence of occlusions and disocclusions, therefore it is not possible to estimate the inverse function in the whole domain. Values in these regions has to be guessed from the available information. We propose an accurate algorithm to calculate the backward flow uniquely from the optical flow, using a simple relation. Occlusions are filled by selecting the maximum motion and disocclusions are filled with two different strategies: a min-fill strategy, which fills each disoccluded region with the minimum value around the region; and a restricted min-fill approach that selects the minimum value in a close neighborhood. In the experimental results, we show the accuracy of the method and compare the results using these two strategies.
URI: http://hdl.handle.net/10553/11279
ISBN: 9789898565471
Source: VISAPP 2013 - Proceedings of the International Conference on Computer Vision Theory and Applications,v. 2, p. 268-273
Rights: by-nc-nd
Appears in Collections:Actas de Congresos

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