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Human Limb Extraction Based on Motion Estimation Using Optical Flow and Image Registration
Toru Tamaki
Graduate School of Science and Technology, Niigata University, 8050 Ikarashi2nocho, Niigata City, Niigata Pref. 950-2181, Japan
Received:August 8, 2003Accepted:December 1, 2003Published:March 20, 2004
Keywords:extraction, motion estimation, optical flow, EM algorithm, gesture recognition
Abstract
We propose a method for extracting human limb regions by the combination of optical flow-based motion segmentation and nonlinear optimization-based image registration. First, rotating limb regions with rough boundaries are extracted and motion parameters are estimated for an approximated model. Then the extracted region and estimated parameters are used as initial values for nonlinear optimization that minimizes residuals of two successive frames and estimates motion parameters. Combining the two steps reduces computational cost and avoids the initial state problem of optimization. According to estimated parameters, the limb region is extracted by a Bayesian classifier to obtain accurate region boundaries. Experimental results on real images are shown.
Cite this article as:T. Tamaki, “Human Limb Extraction Based on Motion Estimation Using Optical Flow and Image Registration,” J. Adv. Comput. Intell. Intell. Inform., Vol.8 No.2, pp. 150-155, 2004.Data files:
