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Title: Calibration method for video and radiation imagers

Abstract

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.

Inventors:
 [1];  [2];  [1];  [3];  [2];  [4]
  1. Oak Ridge, TN
  2. Knoxville, TN
  3. (Knoxville, TN)
  4. Clinton, TN
Issue Date:
Research Org.:
UT-Battelle LLC/ORNL, Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1019562
Patent Number(s):
7973276
Application Number:
US Patent Application 12/511,385
Assignee:
UT-Battelle, LLC (Oak Ridge, TN)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01V - GEOPHYSICS
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01L - SEMICONDUCTOR DEVICES
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY

Citation Formats

Cunningham, Mark F, Fabris, Lorenzo, Gee, Timothy F, Goddard, Jr., James S., Karnowski, Thomas P, and Ziock, Klaus-peter. Calibration method for video and radiation imagers. United States: N. p., 2011. Web.
Cunningham, Mark F, Fabris, Lorenzo, Gee, Timothy F, Goddard, Jr., James S., Karnowski, Thomas P, & Ziock, Klaus-peter. Calibration method for video and radiation imagers. United States.
Cunningham, Mark F, Fabris, Lorenzo, Gee, Timothy F, Goddard, Jr., James S., Karnowski, Thomas P, and Ziock, Klaus-peter. Tue . "Calibration method for video and radiation imagers". United States. https://www.osti.gov/servlets/purl/1019562.
@article{osti_1019562,
title = {Calibration method for video and radiation imagers},
author = {Cunningham, Mark F and Fabris, Lorenzo and Gee, Timothy F and Goddard, Jr., James S. and Karnowski, Thomas P and Ziock, Klaus-peter},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2011},
month = {7}
}

Works referenced in this record:

The Use of Gamma-Ray Imaging to Improve Portal Monitor Performance
journal, December 2008


The use of gamma-ray imaging to improve portal monitor performance
conference, October 2007