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5 March 2014 A novel approach to extract closed foreground object contours in video surveillance
Giounona Tzanidou, Eran A. Edirisinghe
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Proceedings Volume 9026, Video Surveillance and Transportation Imaging Applications 2014; 902615 (2014) https://doi.org/10.1117/12.2041311
Event: IS&T/SPIE Electronic Imaging, 2014, San Francisco, California, United States
Abstract
In this paper we present a novel approach for the detection of closed contours of foreground objects in videos. The proposed methodology begins with an initial localization of contours that is achieved via background subtraction technique that makes use of mixture of Gaussian distributions to model the background. The features that are used to realize an approximate foreground contour segmentation consist of magnitude of gradient at multiple orientations and phase congruency. In the next stage, canny edges of the incoming frames are computed at multiple scales and thresholds using the saturation and value components of HSV image. The approximate foreground contour is refined by reflecting it on the detected edges. A color ratio based noise and shadow line removal technique has been devised to remove the falsely segmented noise and strong shadow edges. Ultimately, to ensure closed contours, edge completion algorithm by anisotropic diffusion is applied. Once the contour is completed, it undergoes flood fill to define the foreground areas. Detailed experimental results on benchmark dataset showed that the proposed framework performs well in most of the different background scenarios. It effectively tackles the presence of shadows, illumination changes, some cases of dynamic background and thermal videos.
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Giounona Tzanidou and Eran A. Edirisinghe "A novel approach to extract closed foreground object contours in video surveillance", Proc. SPIE 9026, Video Surveillance and Transportation Imaging Applications 2014, 902615 (5 March 2014); https://doi.org/10.1117/12.2041311
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KEYWORDS
Image segmentation
RGB color model
Video
Expectation maximization algorithms
Image filtering
Video surveillance
Anisotropic diffusion
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