DocumentCode :
3738001
Title :
Optical flow-based enhancement of spatio-temporal detection in videos
Author :
Rana O. Elnaggar;Mahmoud I. Khalil;Hossam Abdelmunim;Hazem M. Abbas
Author_Institution :
Department of Computer and Systems Engineering, Ain Shams University, Cairo, Egypt
fYear :
2015
Firstpage :
378
Lastpage :
383
Abstract :
Accurate optical flow techniques are widely used in spatio-temporal object detection in videos. However, the computational complexity of the currently used techniques limits the effectiveness of spatio-temporal detection in applications such as action detection and event recognition. Therefore, in this paper we aim at employing rapid yet accurate optical flow techniques to promote the effectiveness of the detection system. The proposed design uses novel optical flow estimation techniques that are based on learned flow basis, known as PCA-Flow and PCA-Layers. PCA-Flow estimates dense flow from a linear flow model based on principle components of natural flow. PCA-Layers is an extension of PCA-Flow. PCA-Layers technique uses Markov random field (MRF) to combine several motion layers into dense optical flow. The motion in each layer is estimated by PCA-Flow. Our experimental results show that our approach maintains the overall performance of the baseline framework while 64% reduction in the computation time is achieved.
Keywords :
"Optical imaging","Videos","Proposals","Mathematical model","Electron tubes","Object detection","Optical computing"
Publisher :
ieee
Conference_Titel :
Computer Engineering & Systems (ICCES), 2015 Tenth International Conference on
Type :
conf
DOI :
10.1109/ICCES.2015.7393079
Filename :
7393079
Link To Document :
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