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Title: Investigating the geomorphological potential of freely available and accessible structure-from-motion photogrammetry using a smartphone
Authors: Micheletti, Natan
Chandler, Jim H.
Lane, Stuart N.
Keywords: Structure-from-motion (SfM)
Close-range photogrammetry
Terrestrial laser scanning (TLS)
Digital terrain model (DTM)
Smartphone technology
Issue Date: 2015
Publisher: © John Wiley & Sons, Ltd.
Citation: MICHELETTI, N., CHANDLER, J.H. and LANE, S.N., 2015. Investigating the geomorphological potential of freely available and accessible structure-from-motion photogrammetry using a smartphone. Earth Surface Processes and Landforms, 40 (4), pp. 473 - 486.
Abstract: We test the acquisition of high-resolution topographic and terrain data using hand-held smartphone technology, where the acquired images can be processed using technology freely available to the research community. This is achieved by evaluating the quality of digital terrain models (DTM) of a river bank and an Alpine alluvial fan generated with a fully automated, free-to-use, structure-from-motion package and a smartphone integrated camera (5 megapixels) with terrestrial laser scanning (TLS) data used to provide a benchmark. To evaluate this approach a 16.2-megapixel digital camera and an established, commercial, close-range and semi-automated software are also employed, and the product of the four combinations of the two types of cameras and software are compared. Results for the river bank survey demonstrate that centimetre-precision DTMs can be achieved at close range (10 m or less), using a smartphone camera and a fully automated package. Results improve to sub-centimetre precision with either higher-resolution images or by applying specific post-processing techniques to the smartphone DTMs. Application to an entire Alpine alluvial fan system shows the degradation of precision scales linearly with image scale, but that (i) the expected level of precision remains and (ii) difficulties in separating vegetation and sediment cover within the results are similar to those typically found when using other photo-based techniques and laser scanning systems.
Description: This is the peer reviewed version of the following article: MICHELETTI, N., CHANDLER, J.H. and LANE, S.N., 2015. Investigating the geomorphological potential of freely available and accessible structure-from-motion photogrammetry using a smartphone. Earth Surface Processes and Landforms, 40 (4), pp. 473 - 486, which has been published in final form at http://dx.doi.org/10.1002/esp.3648. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
Sponsor: This study was partially funded by the Herbette Foundation of the University of Lausanne, Switzerland, and by the Swiss Geomorphological Society (www.geomorphology.ch).
Version: Accepted for publication
DOI: 10.1002/esp.3648
URI: https://dspace.lboro.ac.uk/2134/18477
Publisher Link: http://dx.doi.org/10.1002/esp.3648
ISSN: 0197-9337
Appears in Collections:Published Articles (Civil and Building Engineering)

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