Investigating the geomorphological potential of freely available and accessible structure-from-motion photogrammetry using a smartphone

Details

Serval ID
serval:BIB_50807586B672
Type
Article: article from journal or magazin.
Collection
Publications
Title
Investigating the geomorphological potential of freely available and accessible structure-from-motion photogrammetry using a smartphone
Journal
Earth Surface Processes and Landforms
Author(s)
Micheletti  Natan, Chandler  Jim H., Lane  Stuart N.
Publication state
Published
Issued date
03/2015
Peer-reviewed
Oui
Volume
40
Number
4
Pages
473-486
Language
english
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.
Keywords
structure-from-motion (SfM), close-range photogrammetry, terrestrial laser scanning (TLS), digital terrain model (DTM), smartphone technology
Create date
01/04/2015 17:28
Last modification date
20/08/2019 15:06
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