- Title
- Metric capabilities of low-cost digital cameras for close range surface measurement
- Creator
- Chandler, J H; Fryer, John G; Jack, A
- Relation
- Photogrammetric Record Vol. 20, no. 109, p. 12-26
- Publisher
- Blackwell Publishing
- Resource Type
- journal article
- Date
- 2005
- Description
- This paper examines the potential of low-cost digital cameras for close range surface measurement using feature-based image matching methods. This is achieved through extracting digital elevation models (DEMs) and comparing accuracies between three low-cost consumer-grade digital cameras (Sony DSC-P10, Olympus C3030, Nikon Coolpix 3100) and the proven Kodak DCS460. Surprisingly, the tests revealed that the highest accuracies were achieved using the Sony DSC-P10, not the Kodak DCS460, whilst the other two cameras certainly proved suitable for most close range surface measurement tasks. Lens modelling was found to provide a limiting constraint on final accuracies, with very small systematic error surfaces caused by residual imperfections in lens modelling. The IMAGINE OrthoBASE Pro software and an independent self-calibrating bundle adjustment were used to process these data. These tests identified an inaccuracy in the self-calibrating capability of IMAGINE OrthoBASE Pro version 8(.)6 and Leica Geosystems LPS 8(.)7, which will be rectified in subsequent software releases. The study has demonstrated that cheaper consumer-grade digital cameras have potential for routine surface measurement provided lens modelling is considered. The lead author is maintaining a web-based repository,for camera calibration data, which may assist other users.
- Subject
- close range photogrammetry; DEM extraction; digital cameras; surface; measurement; self-calibration; photogrammetry; accuracy; behavior; models
- Identifier
- uon:178
- Identifier
- http://hdl.handle.net/1959.13/25219
- Identifier
- ISSN:1477-9730
- Rights
- *
- Language
- eng
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