DBPapers
DOI: 10.5593/SGEM2014/B23/S10.011

CAPABILITIES OF A SMARTPHONE FOR GEOREFERENCED 3D MODEL CREATION: AN EVALUATION

K. Bakula, A. Flasinski
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-12-4 / ISSN 1314-2704, June 19-25, 2014, Book 2, Vol. 3, 85-92 pp

ABSTRACT
This paper focuses on assessing capabilities of a smartphone for performing a specific close-range photogrammetry task: creating a georeferenced 3D model. One of the subjects discussed in this paper was the application of non-metric camera and location sensors’ usefulness in photogrammetric data processing. The calibration of the camera was carried out on the basis of measurements in a three-dimensional test field. Another piece of research was carried out to evaluate the quality of angular sensors and GNSS antenna which are embedded in the tested device. Data collected in these experiments was used for image geometric correction and weighting the equations in the adjustment process. In a further experiment, an evaluation of smartphones capabilities for creating a georeferenced 3D model was made by a creating model of an Old Town wall fragment located in Warsaw. During several bundle adjustments with different options it was proved that initial values of exterior orientation can increase the accuracy of photogrammetric post processing with a low number of control points. Application of integrated sensors in smarthphones is definitely useful for low-cost 3D modelling and it can be a good solution for achieving accuracy of decimeters in creating a model of an object. However, accuracy of centimeters required in close-range photogrammetry cannot be guaranteed by using onlya smartphone without considering an application of at least 3 control points.

Keywords: smartphone, 3D model, calibration, GNSS, bundle adjustment nt