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http://dx.doi.org/10.3807/JOSK.2016.20.6.745

Adaptive Detection of a Moving Target Undergoing Illumination Changes against a Dynamic Background  

Lu, Mu (Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences)
Gao, Yang (Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences)
Zhu, Ming (Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences)
Publication Information
Journal of the Optical Society of Korea / v.20, no.6, 2016 , pp. 745-751 More about this Journal
Abstract
A detection algorithm, based on the combined local-global (CLG) optical-flow model and Gaussian pyramid for a moving target appearing against a dynamic background, can compensate for the inadaptability of the classic Horn-Schunck algorithm to illumination changes and reduce the number of needed calculations. Incorporating the hypothesis of gradient conservation into the traditional CLG optical-flow model and combining structure and texture decomposition enable this algorithm to minimize the impact of illumination changes on optical-flow estimates. Further, calculating optical-flow with the Gaussian pyramid by layers and computing optical-flow at other points using an optical-flow iterative with higher gray-level points together reduce the number of calculations required to improve detection efficiency. Finally, this proposed method achieves the detection of a moving target against a dynamic background, according to the background motion vector determined by the displacement and magnitude of the optical-flow. Simulation results indicate that this algorithm, in comparison to the traditional Horn-Schunck optical-flow algorithm, accurately detects a moving target undergoing illumination changes against a dynamic background and simultaneously demonstrates a significant reduction in the number of computations needed to improve detection efficiency.
Keywords
Moving target detection; Combined local-global optical-flow model; Gaussian pyramid; Illumination changes;
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Times Cited By KSCI : 3  (Citation Analysis)
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