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Position estimation and multiple obstacles tracking method based on stereo vision system

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4 Author(s)
Young-Chul Lim ; Div. of Adv. Ind. Sci. & Technol., Deagu Gyeongbuk Inst. of Sci. & Technol., Daegu, South Korea ; Chung-Hee Lee ; Soon Kwon ; Jong-Hun Lee

In this paper, we present a method to estimate obstacles' position and track multiple obstacles on the road based on a stereo vision system. A stereo vision system can measure distance to an obstacle using disparity. However, this system has several problems such as sampling error, geometric problems due to the installation of a stereo camera, and image distortion in the calibration and rectification processes that cause deterioration in accuracy and reliability. We utilize a multi-layer perceptron (MLP) method to correct mean error, and also a strong tracking interacting multiple model (ST-IMM) Kalman filter is proposed to minimize the error variance. The ST-IMM has robustness for maneuver and non-stationary error variance. ST-IMM has an advantage that one model can complement another model's shortcomings by using several sub-models. A simple data association method based on nearest neighborhood filtering is proposed to track multiple obstacles. The experiment results show that our algorithms can estimate the target's position and track multiple objects within about 4% distance error in range of 10 to 50 m, even when the target vehicle maneuvers rapidly.

Published in:

Intelligent Vehicles Symposium, 2009 IEEE

Date of Conference:

3-5 June 2009

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