DBPapers
DOI: 10.5593/SGEM2014/B23/S10.027

LYTRO CAMERA TECHNOLOGY AND ITS USABILITY FOR CLOSE-RANGE PHOTOGRAMMETRY

J. Sedina, Z. Bila, Eliska Housarova
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, 215-222 pp

ABSTRACT
Beginning in the nineties, new technology for the documentation of archaeological and historical objects has been preferred in research. Very rapid development of the new technologies based on computer processing or computer–aided techniques with rapid digital camera development such as laser scanning meant a great change in general. The modern approach in spatial documentation deals with image-based modeling. There is a problem with the focusing of whole spatial objects. Non-sharp parts cannot be successfully processed to a precise point cloud or 3D model. So far, it has been necessary to capture spatial or significantly curved objects in small increments. Recently, there has been an evolving commercial market of plenoptic camera technology. Such a well-known product is the Lytro camera, a low-cost plenoptic camera. The main ability of this technology is to capture traces of light rays inside the camera. Due to this property of plenoptic cameras, we are able to produce images with extended depths of field. Photogrammetry has faced the image focus problem in the whole area since the beginning. The ability of creating images with an extended depth of field is suitable property for close range photogrammetry, where objects could be imaged in a very short distance. Low image resolution and the ability of producing images with an extended depth of field makes this technology usable for small object documentation. This paper will introduce the testing of this technology for the Czech Technical University in Prague for the documentation of small bronze archaeological findings. Images with an extended depth of field have been used as a base for the creation of 3D documentation of these archaeological findings.

Keywords: Lytro camera, plenoptic camera, light field, close-range photogrammetry, 3D documentation.