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Calibration method for video and radiation imagers

United States Patent

July 5, 2011
View the Complete Patent at the US Patent & Trademark Office
Oak Ridge National Laboratory - Visit the Partnerships Directorate Website
The relationship between the high energy radiation imager pixel (HERIP) coordinate and real-world x-coordinate is determined by a least square fit between the HERIP x-coordinate and the measured real-world x-coordinates of calibration markers that emit high energy radiation imager and reflect visible light. Upon calibration, a high energy radiation imager pixel position may be determined based on a real-world coordinate of a moving vehicle. Further, a scale parameter for said high energy radiation imager may be determined based on the real-world coordinate. The scale parameter depends on the y-coordinate of the moving vehicle as provided by a visible light camera. The high energy radiation imager may be employed to detect radiation from moving vehicles in multiple lanes, which correspondingly have different distances to the high energy radiation imager.
Cunningham; Mark F. (Oak Ridge, TN), Fabris; Lorenzo (Knoxville, TN), Gee; Timothy F. (Oak Ridge, TN), Goddard, Jr.; James S. (Knoxville, TN), Karnowski; Thomas P. (Knoxville, TN), Ziock; Klaus-peter (Clinton, TN)
UT-Battelle, LLC (Oak Ridge, TN)
12/ 511,385
July 29, 2009
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT This invention was made with United States government support under Prime Contract No. DE-AC05-00OR22725 awarded by the U.S. Department of Energy. The United States government has certain rights in this invention.