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26 September 2007 High-precision investigations of the fast range imaging camera SwissRanger
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Many applications need fast measurement systems that capture their environment in three dimensions. Adequate measurement sensors are required that provide fast, accurate, and reliable 3-D data. Automotive applications long for real time and reliable data, not only for driving assistance systems but for safety, also. Until now, most solutions, like multi image photogrammetry, radar sensors or laser scanners, lack in one of these aspects at least. With the upcoming range imaging cameras, new sensors with a performance never seen before are to be taken into consideration. Range imaging has already been proved as an emerging technology for automotive applications. These cameras provide a distance measurement system in each pixel and therefore produce 3-D data with up to video frame rates with a single sensor. But because of their new measurement concept classical calibration approaches cannot be used. This paper will present results of research about the calibration of the SwissRangerTM, a range imaging camera introduced by CSEM Switzerland. Special emphasis is given to the determination of the influence of the diverse parameters on the distance measurement accuracy. These parameters are the temperature, the reflectivity and the distance itself, for example. The influences are represented in functional dependencies in order to reach high accuracy of the system. Temperature compensation by means of a specialized setup is addressed. A successful implementation of a temperature drift compensation by means of a differential setup is presented.
© (2007) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
T. Kahlmann and H. Ingensand "High-precision investigations of the fast range imaging camera SwissRanger", Proc. SPIE 6758, Photonics in the Transportation Industry: Auto to Aerospace, 67580J (26 September 2007);

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