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16 May 2003 Calibration and use of video cameras in the photometric assessment of aerodrome ground lighting
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Abstract
This paper describes the adaptation and calibration of domestic CCD cameras for a novel air based measurement system that assesses the intensity, alignment and colour of aerodrome ground lighting (AGL) in service. The measurement system comprises calibrated domestic cameras, lenses and filters capable of examining the desired lighting area. The system has been corrected for distortion, bias, partial pixel coverage and colouration effects. The problems of inbuilt camera signal processing and dynamic range have also been studied and allowed for. The developed image processing techniques allow luminaire location and extraction between successive images. For each extracted luminaire, pixel information is automatically correlated and related to an illuminance value using apriori information. The corresponding intensity and alignment is derived using position and orientation information estimated using a vision model and differential GPS. These techniques have been applied to sequences of images collected at various aerodromes. The results reflect the belief that the highly developed enabling technologies of GPS and digital imaging can be combined to tackle further photometry problems.
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Karen McMenemy, Francis Mullin, and Gordon Dodds "Calibration and use of video cameras in the photometric assessment of aerodrome ground lighting", Proc. SPIE 5017, Sensors and Camera Systems for Scientific, Industrial, and Digital Photography Applications IV, (16 May 2003); https://doi.org/10.1117/12.476780
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