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» Moving Region Detection in Compressed Video
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ICASSP
2011
IEEE
13 years 1 months ago
Region-adaptive probability model selection for the arithmetic coding of video texture
In video coding systems using adaptive arithmetic coding to compress texture information, the employed symbol probability models need to be retrained every time the coding process...
Kenneth Vermeirsch, Joeri Barbarien, Peter Lambert...
IJCV
2012
12 years 6 days ago
Sparse Occlusion Detection with Optical Flow
Abstract We tackle the problem of detecting occluded regions in a video stream. Under assumptions of Lambertian reflection and static illumination, the task can be posed as a vari...
Alper Ayvaci, Michalis Raptis, Stefano Soatto
ICMCS
2005
IEEE
152views Multimedia» more  ICMCS 2005»
14 years 3 months ago
Periodicity Detection of Local Motion
Periodicity is useful for compact representation of periodic motion and a reasonable selection of a proper temporal scale for periodic motion analysis. In this paper, we concern t...
Xiaofeng Tong, Lingyu Duan, Changsheng Xu, Qi Tian...
CVPR
2009
IEEE
1863views Computer Vision» more  CVPR 2009»
15 years 4 months ago
Abnormal Crowd Behavior Detection using Social Force Model
In this paper we introduce a novel method to detect and localize abnormal behaviors in crowd videos using Social Force model. For this purpose, a grid of particles is placed ove...
Alexis Oyama, Mubarak Shah, Ramin Mehran
CVPR
2012
IEEE
12 years 6 days ago
Video segmentation by tracing discontinuities in a trajectory embedding
Our goal is to segment a video sequence into moving objects and the world scene. In recent work, spectral embedding of point trajectories based on 2D motion cues accumulated from ...
Katerina Fragkiadaki, Geng Zhang, Jianbo Shi