Stereoscopic Scene Flow Computation for 3D Motion Understanding |
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Authors: | Andreas Wedel Thomas Brox Tobi Vaudrey Clemens Rabe Uwe Franke Daniel Cremers |
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Affiliation: | 1.GR/PAA,Daimler Research,Sindelfingen,Germany;2.Albert-Ludwigs-University,Freiburg,Germany;3.University of Auckland,Auckland,New Zealand;4.Department of Computer Science,Technical University of Munich,Munich,Germany |
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Abstract: | Building upon recent developments in optical flow and stereo matching estimation, we propose a variational framework for the
estimation of stereoscopic scene flow, i.e., the motion of points in the three-dimensional world from stereo image sequences.
The proposed algorithm takes into account image pairs from two consecutive times and computes both depth and a 3D motion vector
associated with each point in the image. In contrast to previous works, we partially decouple the depth estimation from the
motion estimation, which has many practical advantages. The variational formulation is quite flexible and can handle both
sparse or dense disparity maps. The proposed method is very efficient; with the depth map being computed on an FPGA, and the
scene flow computed on the GPU, the proposed algorithm runs at frame rates of 20 frames per second on QVGA images (320×240
pixels). Furthermore, we present solutions to two important problems in scene flow estimation: violations of intensity consistency
between input images, and the uncertainty measures for the scene flow result. |
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