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Spatiotemporal descriptor for wide-baseline stereo reconstruction of non-rigid and ambiguous scenes
Trulls Fortuny, Eduard; Sanfeliu Cortés, Alberto; Moreno-Noguer, Francesc
Universitat Politècnica de Catalunya. Departament d'Enginyeria de Sistemes, Automàtica i Informàtica Industrial; Universitat Politècnica de Catalunya. Institut de Robòtica i Informàtica Industrial; Universitat Politècnica de Catalunya. VIS - Visió Artificial i Sistemes Intel.ligents
This paper studies the use of temporal consistency to match appearance descriptors and handle complex ambiguities when computing dynamic depth maps from stereo. Previous attempts have designed 3D descriptors over the spacetime volume and have been mostly used for monocular action recognition, as they cannot deal with perspective changes. Our approach is based on a state-of-the-art 2D dense appearance descriptor which we extend in time by means of optical flow priors, and can be applied to wide-baseline stereo setups. The basic idea behind our approach is to capture the changes around a feature point in time instead of trying to describe the spatiotemporal volume. We demonstrate its effectiveness on very ambiguous synthetic video sequences with ground truth data, as well as real sequences.
Peer Reviewed
Àrees temàtiques de la UPC::Informàtica::Robòtica
Artificial vision
appearance descriptors
spatiotemporal
stereo
Visió artificial (Robòtica)
info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/conferenceObject
Springer
         

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