Infra red camera calibration
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United States of America Patent
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-
Jan 3, 2006
Grant Date -
May 19, 2005
app pub date -
Mar 4, 2003
filing date -
Mar 8, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Described herein is a method and apparatus for calibrating an infrared camera at elevated temperatures using a reference surface. The method comprises selecting a normal well-fill condition for pixels in the camera in accordance with normal operating temperatures and stare time (30, 32, 34), using the normal well-fill condition to calculate a selected stare time/surface temperature combination for which selected non-uniform calibration coefficients are determined (36, 38), adjusting and re-adjusting the stare time/surface temperature to obtain adjusted and re-adjusted non-uniform calibration coefficients respectively (40, 42, 44, 46), and determining final non-uniform calibration coefficients for the camera using the selected, adjusted and re-adjusted non-uniform calibration coefficients (48).
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