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Optical Engineering

Highly accurate texture-based vehicle segmentation method
Author(s): William Wai Leung Lam; Clement Chun-Cheong Pang; Nelson Hon Ching Yung
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Paper Abstract

In modern traffic surveillance, computer vision methods have often been employed to detect vehicles of interest because of the rich information content contained in an image. Segmentation of moving vehicles using image processing and analysis algorithms has been an important research topic in the past decade. However, segmentation results are strongly affected by two issues: moving cast shadows and reflective regions, both of which reduce accuracy and require postprocessing to alleviate the degradation. We propose an efficient and highly accurate texture-based method for extracting the boundary of vehicles from the stationary background that is free from the effect of moving cast shadows and reflective regions. The segmentation method utilizes the differences in textural property between the road, vehicle cast shadow, reflection on the vehicle, and the vehicle itself, rather than just the intensity differences between them. By further combining the luminance and chrominance properties into an OR map, a number of foreground vehicle masks are constructed through a series of morphological operations, where each mask describes the outline of a moving vehicle. The proposed method has been tested on real-world traffic image sequences and achieved an average error rate of 3.44% for 50 tested vehicle images.

Paper Details

Date Published: 1 March 2004
PDF: 13 pages
Opt. Eng. 43(3) doi: 10.1117/1.1645849
Published in: Optical Engineering Volume 43, Issue 3
Show Author Affiliations
William Wai Leung Lam, Univ. of Hong Kong (Hong Kong China)
Clement Chun-Cheong Pang, Univ. of Hong Kong (Hong Kong China)
Nelson Hon Ching Yung, Univ. of Hong Kong (Hong Kong China)

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