Real-time obstacle detection for an autonomous wheelchair using stereoscopic cameras

Publisher:
IEEE
Publication Type:
Conference Proceeding
Citation:
Proceedings of the 29th International Conference of the IEEE Engineering in Medicine and Biology Society, 2007, pp. 4775 - 4778
Issue Date:
2007-01
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This paper is concerned with the development of a real-time obstacle avoidance system for an autonomous wheelchair using stereoscopic cameras by severely disabled people. Based on the left and right images captured from stereoscopic cameras mounted on the wheelchair, the optimal disparity is computed using the Sum of Absolute Differences (SAD) correlation method. From this disparity, a 3D depth map is constructed based on a geometric projection algorithm. A 2D map converted from this 3D map can then be employed to provide an effective obstacle avoidance strategy for this wheelchair. Experiment results obtained in a practical environment show the effectiveness of this real-time implementation.
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