Learning to Find Object Boundaries Using Motion Cues
Stein, Andrew; Hoiem, Derek; Hebert, Martial
Computer Vision, 2007. ICCV 2007. IEEE 11th International Conference on
Volume , Issue , 14-21 Oct. 2007 Page(s):1 - 8
Digital Object Identifier 10.1109/ICCV.2007.4408841
Summary:While great strides have been made in detecting and localizing specific objects in natural images, the bottom-up segmentation of unknown, generic objects remains a difficult challenge. We believe that occlusion can provide a strong cue for object segmentation and "pop-out", but detecting an object's occlusion boundaries using appearance alone is a difficult problem in itself. If the camera or the scene is moving, however, that motion provides an additional powerful indicator of occlusion. Thus, we use standard appearance cues (e.g. brightness/color gradient) in addition to motion cues that capture subtle differences in the relative surface motion (i.e. parallax) on either side of an occlusion boundary. We describe a learned local classifier and global inference approach which provide a frame-work for combining and reasoning about these appearance and motion cues to estimate which region boundaries of an initial over-segmentation correspond to object/occlusion boundaries in the scene. Through results on a dataset which contains short videos with labeled boundaries, we demonstrate the effectiveness of motion cues for this task.
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