Mr. Timo Kahlmann Profile

Timo Kahlmann

at ETH Zurich

SPIE Involvement:

Author

Proceedings Article | 26 September 2007 Paper

High-precision investigations of the fast range imaging camera SwissRanger

T. Kahlmann, H. Ingensand

Proceedings Volume 6758, 67580J (2007) https://doi.org/10.1117/12.749729

KEYWORDS: Distance measurement, Cameras, Calibration, Sensors, Reflectivity, Temperature metrology, Range imaging, 3D metrology, Scattering, Imaging systems

Read Abstract +

Proceedings Article | 29 January 2007 Paper

Range imaging technology: new developments and applications for people identification and tracking

Timo Kahlmann, Fabio Remondino, Sébastien Guillaume

Proceedings Volume 6491, 64910C (2007) https://doi.org/10.1117/12.702512

KEYWORDS: Cameras, Calibration, Distance measurement, Particles, Range imaging, Sensors, Digital filtering, Image segmentation, 3D metrology, 3D image processing

Read Abstract +

Proceedings Article | 5 October 2006 Paper

Calibration of the fast range imaging camera SwissRanger for use in the surveillance of the environment

Timo Kahlmann, Hilmar Ingensand

Proceedings Volume 6396, 639605 (2006) https://doi.org/10.1117/12.684458

KEYWORDS: Calibration, Cameras, Sensors, Distance measurement, Range imaging, 3D metrology, Imaging systems, Surveillance, Detection and tracking algorithms, Temperature metrology

Read Abstract +

Proceedings Article | 16 February 2005 Paper

3D-TOF sensors in the automobile

Timo Kahlmann, Thierry Oggier, Felix Lustenberger, Nicolas Blanc, Hilmar Ingensand

Proceedings Volume 5663, (2005) https://doi.org/10.1117/12.607261

KEYWORDS: Distance measurement, Cameras, Sensors, Calibration, Modulation, 3D-TOF imaging, Stereoscopic cameras, Phase measurement, Imaging systems, Phase shift keying

Read Abstract +

Proceedings Article | 17 January 2005 Paper

Calibration and improvements of the high-resolution range-imaging camera SwissRanger

Timo Kahlmann, Hilmar Ingensand

Proceedings Volume 5665, 56650F (2005) https://doi.org/10.1117/12.582513

KEYWORDS: Calibration, Cameras, Laser scanners, Imaging systems, Sensors, Laser development, Laser systems engineering, Temporal resolution, Geodesy, Photogrammetry

Read Abstract +

3D-coordinate producing systems have become very successful in the recent years. Aerial and terrestrial laser scanners are now ‘state-of-the-art’ to get information of the third and forth dimension and replace photogrammetric camera systems. Laser scanners typically have a very high point density, but because of their sequential mode of operation their shortcomings are both their speed of acquisition and their size. The new range-imaging camera SwissRanger, developed by Centre Suisse d'Electronique et de Microtechnique SA (CSEM), is the first step to a follow-up generation of 3D-measurement systems and gets over the shortcomings and disadvantages of current photogrammetric systems and laser scanners. Because of its high-resolution with more than twenty thousand pixel, the created 3D-dataset even allows deducing geometrical information of the environment. The accuracy of the acquired distance is approximately 1 cm. Temporal resolution depends on various parameters like integration time, soft- and hardware. But five Hertz image sequences can be easily reached. Therefore, (near) real-time measurements are possible. Several influencing parameters have been investigated in the calibration Lab of the Institute of Geodesy and Photogrammetry at the Swiss Federal Institute of Technology Zurich (Switzerland). Besides first experiences and analysis of the data, acquired by the SwissRanger, a suitable approach for the calibration of such a system is to be considered and validated. First, a two-component calibration splits the sensor into a camera and a range measuring module. Both are calibrated separately with common known methods. The results of this calibration approach are compared to a newly developed single-step calibration. Hereby, the sensor is regarded as one single (black box) system. No assumption about the internal model is necessary. The results of the calibration are used for the improvement of the measurements. Further, new applications for such a 3D-positioning system are presented. Besides the usefulness of the SwissRanger in car parking assistant systems, the applicability for an indoor positioning system is evaluated. The required accuracy and precision are focused.

Conference Committee Involvement (1)

Photonic Applications for Aerospace, Transportation, and Harsh Environment III

23 April 2012 | Baltimore, Maryland, United States

Keywords/Phrases

Search In:

Publication Years