Korean Journal of Geomatics
- Volume 3 Issue 1
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- Pages.43-51
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- 2003
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- 1598-4699(pISSN)
Precision of Digital Photogrammetry for the Roughness Measurement of Rock Surfaces
- Lee, Hyo-Sung (Research Institute of Engineering Science, Seoul National University) ;
-
Ahn, Ki-Won
(Dept. of Civil Eng., College of Eng., Gyeongsang National University)
;
- Park, Byung-Uk (Dept. of Civil Eng., College of Eng., Hankyong National University) ;
-
Kim, Yong-Il
(Division of Urban Eng., College of Eng., Seoul National University)
- Published : 2003.06.01
Abstract
This paper presents the benefits of using close-range digital photogrammetric techniques for measuring the roughness of rock surfaces, using digital stereo images obtained from a Rolleiflex 6006 metric camera. To precisely measure surface roughness, we researched on how to use the flat and curved reference surface obtained from geometrically corrected digital images of the rock surface by using the least squares method. To test the precision of the proposed technique, the surface roughness has been measured between the reference surface and sample areas of very smooth-surfaced rock. Then the results were compared with the measurements obtained from a laser sensor profilometer.
Keywords
- Roughness measurement;
- Digital photogrammetric techniques;
- Flat and curved reference surface;
- Laser sensor profilometer