Lab meeting May 15, 2014 (Yun-Jun Shen): Robust Monocular Epipolar Flow Estimation

Title: Robust Monocular Epipolar Flow Estimation

Authors: Koichiro Yamaguchi, David McAllester and Raquel Urtasun

Abstract:
We consider the problem of computing optical flow in monocular video taken from a moving vehicle. In this setting, the vast majority of image flow is due to the vehicle’s ego-motion. We propose to take advantage of this fact and estimate flow along the epipolar lines of the egomotion. Towards this goal, we derive a slanted-plane MRF model which explicitly reasons about the ordering of planes and their physical validity at junctions. Furthermore, we present a bottom-up grouping algorithm which produces over-segmentations that respect flow boundaries. We demonstrate the effectiveness of our approach in the challenging KITTI flow benchmark achieving half the error of the best competing general flow algorithm and one third of the error of the best epipolar flow algorithm.

In: Computer Vision and Pattern Recognition (CVPR), 2013 IEEE Conference on. IEEE, 2013

Link:  http://ttic.uchicago.edu/~rurtasun/publications/yamaguchi_et_al_cvpr13.pdf