DBPapers
DOI: 10.5593/SGEM2014/B23/S10.006

ASSESSMENT OF THE INFLUENCE OF AERIAL IMAGE RADIOMETRY ON THE QUALITY OF POINT CLOUDS GENERATED BY SEMI-GLOBAL MATCHING

W.Dominik
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, 43-54 pp

ABSTRACT
This paper presents the results of the research concerning the influence of aerial image radiometry on the quality of the point cloud generated by semi-global matching. The research involved the examination of several issues related to image radiometry such as spectral band, histogram stretching, bit depth and lossy compression. A selected pair of images acquired with the use of Intergraph DMCII230 aerial camera have been subjected to semi-global matching. This step was carried out using images resulting from different radiometric processing scenarios. The quality of the resulting point clouds was evaluated by analyzing statistical parameters on flat parts of terrain surface. For the purpose of the evaluation 6 control planes were defined. An additional visual assessment of point clouds was carried out consisting mainly of point clouds profile analysis. The results enabled to formulate the conclusions concerning the influence of image radiometric parameters on the semi-global matching. Some recommendations concerning the radiometric processing of aerial images for optimal results of semiglobal matching are made.

Keywords: Matching, Image, Point Cloud, Radiometry, Quality