COMPARATIVE GEOMETRIC TESTS OF INDUSTRIAL AND SCIENTIFIC CCD CAMERAS USING PLUMB LINE AND TEST RANGE CALIBRATIONS

Abstract

Small format, medium resolution CCD cameras are at present widely used for industrial metrology applications. Large format, high resolution CCD cameras are principally used for scientific applications, but are slowly infiltrating photogrammetry and dramatically improving the object space accuracy achievable by close range measurement. The calibration of all types of CCD cameras is necessary in order to characterise the geometry of the sensors and lenses. Fourteen different types of CCD sensor and lens combinations have been calibrated at the NASA Langley Research Center using plumb line calibration combined with self-calibration and a targeted test field. The results of these calibration tests will be described, with particular emphasis on the dependence on sensor resolution and a comparison of industrial and scientific CCD cameras.