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Proceedings Paper

Gamma/x-ray linear pushbroom stereo for 3D cargo inspection
Author(s): Zhigang Zhu; Yu-Chi Hu
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Paper Abstract

For evaluating the contents of trucks, containers, cargo, and passenger vehicles by a non-intrusive gamma-ray or X-ray imaging system to determine the possible presence of contraband, three-dimensional (3D) measurements could provide more information than 2D measurements. In this paper, a linear pushbroom scanning model is built for such a commonly used gamma-ray or x-ray cargo inspection system. Accurate 3D measurements of the objects inside a cargo can be obtained by using two such scanning systems with different scanning angles to construct a pushbroom stereo system. A simple but robust calibration method is proposed to find the important parameters of the linear pushbroom sensors. Then, a fast and automated stereo matching algorithm based on free-form deformable registration is developed to obtain 3D measurements of the objects under inspection. A user interface is designed for 3D visualization of the objects in interests. Experimental results of sensor calibration, stereo matching, 3D measurements and visualization of a 3D cargo container and the objects inside, are presented.

Paper Details

Date Published: 24 May 2006
PDF: 11 pages
Proc. SPIE 6213, Non-Intrusive Inspection Technologies, 621304 (24 May 2006); doi: 10.1117/12.664204
Show Author Affiliations
Zhigang Zhu, CUNY (United States)
The CUNY Graduate Ctr. (United States)
Yu-Chi Hu, The CUNY Graduate Ctr. (United States)
Memorial Sloan-Kettering Cancer Ctr. (United States)

Published in SPIE Proceedings Vol. 6213:
Non-Intrusive Inspection Technologies
George Vourvopoulos; F. Patrick Doty, Editor(s)

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