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• Kaasalainen, S
• Krooks, A
• Kukko, A
• Kaartinen, H
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• Krooks, A
• Kukko, A
• Kaartinen, H
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• Krooks, A
• Kukko, A
• Kaartinen, H

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Remote Sens. 2009, 1(3), 144-158; doi:10.3390/rs1030144

Article

Radiometric Calibration of Terrestrial Laser Scanners with External Reference Targets

Sanna Kaasalainen* , Anssi Krooks, Antero Kukko and Harri Kaartinen

Department of Remote Sensing and Photogrammetry, Finnish Geodetic Institute, Geodeetinrinne 2, 02431 Masala, Finland

* Author to whom correspondence should be addressed.

Received: 2 June 2009; in revised form: 29 June 2009 / Accepted: 3 July 2009 / Published: 3 July 2009

Download PDF Full-Text [481 KB, uploaded 3 August 2009 04:58 CEST]

Abstract: The intensity data produced by terrestrial laser scanners has become a topic of increasing interest in the remote sensing community. We present a case study of radiometric calibration for two phase-shift continuous wave (CW) terrestrial scanners and discuss some major issues in correcting and applying the intensity data, and a practical calibration scheme based on external reference targets. There are differences in the operation of detectors of different (although similar type) instruments, and the detector effects must be known in order to calibrate the intensity data into values representing the target reflectance. It is, therefore, important that the effects of distance and target reflectance on the recorded intensity are carefully studied before using the intensity data from any terrestrial laser scanner.

Keywords: terrestrial laser scanning; calibration; intensity

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