The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
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Articles | Volume XLII-2/W13
Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLII-2/W13, 1631–1635, 2019
https://doi.org/10.5194/isprs-archives-XLII-2-W13-1631-2019
Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLII-2/W13, 1631–1635, 2019
https://doi.org/10.5194/isprs-archives-XLII-2-W13-1631-2019

  05 Jun 2019

05 Jun 2019

AUTOMATIC CALIBRATION AND CO-REGISTRATION FOR A STEREO CAMERA SYSTEM AND A THERMAL IMAGING SENSOR USING A CHESSBOARD

A. Choinowski, D. Dahlke, I. Ernst, S. Pless, and I. Rettig A. Choinowski et al.
  • Institute of Optical Sensor Systems, German Aerospace Center, 12489 Berlin, Germany

Keywords: Thermal, VIS, Chessboard, Co-Registration, Realtime, System calibration

Abstract. This paper presents a system calibration method for a trifocal sensor, which is sensitive to different spectral bands. The trifocal camera system consists of a stereo camera, operating in the visual (VIS) spectrum and a thermal imaging camera, operating in the Long-Wave- Infrared (LWIR) spectrum. Intrinsic parameters and spatial alignment are determined simultaneously. As calibration target a passive aluminium chessboard is used. Corner detection and subsequent bundle adjustment is done on all synchronized image triplets. The remaining reprojection errors are in the sub-pixel range and enable the system to generate metric point clouds, colored with thermal intensities in real-time.