Calibration method for video and radiation imagers

Patent · Tue Jul 05 00:00:00 EDT 2011

OSTI ID:1019562

Cunningham, Mark F ^[1]; Fabris, Lorenzo ^[2]; Gee, Timothy F ^[1]; Karnowski, Thomas P ^[2]; Ziock, Klaus-peter ^[3]

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1. Oak Ridge, TN
2. Knoxville, TN
3. Clinton, TN

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.

• Research Organization: UT-Battelle LLC/ORNL, Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-00OR22725
• Assignee: UT-Battelle, LLC (Oak Ridge, TN)
• Patent Number(s): 7,973,276
• Application Number: US Patent Application 12/511,385
• OSTI ID: 1019562
• Country of Publication: United States
• Language: English

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