Field calibration of zoom cameras for two camera- photogrammetric applications

Chong, Albert K.-F. (2009) Field calibration of zoom cameras for two camera- photogrammetric applications. In: RSPSoc 2009 Annual Conference, 8-11 September 2009, Leicester, England.


To obtain reliable 3D measurements from photogrammetric technique imaging, cameras must be calibrated to determine the value of the principal distance and various lens parameters. As zoom and auto-focus are known to change, the principal distance at the instant of imaging the use of laboratory-calibrated value may produce significant measurement errors. The value of other lens parameters also may change as a result of field imaging.
Research was carried out to determine a reliable technique to obtain the value of the principal distance and other lens parameters in the field. This research was limited to a stereo-camera configuration where two digital cameras were used to map objects. The calibration involved
simultaneous computations of the principal distance and other lens parameters of both cameras using a pair of stereo-images and a temporary control panel. The objective of the paper is therefore to discuss the testing of the developed technique and demonstrate its capacity for a high-accuracy field 3D measurement. Results of this research show that
accuracy improvement is in the order of two times better than the conventional technique which uses self-calibration PDs and APs.

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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Additional Information: No evidence of copyright restrictions.
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Surveying and Land Information
Date Deposited: 21 Jun 2010 04:21
Last Modified: 07 Jul 2014 01:37
Uncontrolled Keywords: camera calibration; photogrammetric technique imaging
Fields of Research : 09 Engineering > 0999 Other Engineering > 099902 Engineering Instrumentation
09 Engineering > 0909 Geomatic Engineering > 090905 Photogrammetry and Remote Sensing
01 Mathematical Sciences > 0102 Applied Mathematics > 010299 Applied Mathematics not elsewhere classified
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970110 Expanding Knowledge in Technology

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