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Three-dimensional documentation of human skeletal remains using 123DCatch software: a reliability of distance measurements

Citace:
GALETA, P., SLÁDEK, V., MACHÁČEK, J. Three-dimensional documentation of human skeletal remains using 123DCatch software: a reliability of distance measurements. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, 2015, roč. 156, č. S60, s. 139-139. ISSN: 0002-9483
Druh: ČLÁNEK
Jazyk publikace: eng
Anglický název: Three-dimensional documentation of human skeletal remains using 123DCatch software: a reliability of distance measurements
Rok vydání: 2015
Autoři: Mgr. Patrik Galeta Ph.D. , Mgr. Vladimír Sládek Ph.D. , Prof.Mgr. Jiří Macháček
Abstrakt CZ: V příspěvku jsou srovnány postupy trojrozměrného měření vzdáleností lidských kosterních pozůstatků v terénu, a to totální stanice, Microscribe a software 123DCatch
Abstrakt EN: The recording of the in-situ position of human remains in 3D is an essential method of field anthropology. The most reliable method of 3D measurement in the field provides MicroScribe and total station (TS) when the laser beam is accurately pointed into the center of the prism. Recently, software that create 3D models from series of ordinary photographs taken at various angles has been proposed as an alternative spatial data acquisition method. The reliability of spatial data based on 3D models has not been systematically evaluated. Our aim is to assess the reliability of distance measurements derived from 3D models and compare them with those calculated from 3D coordinates acquired in the field by TS. We analyzed six 3D models of skeletons generated from 22 photos on average using 123D Catch free software. We used single burial skeletons, lying in a stretched position, excavated at the Medieval sites of Všeruby and Pohansko (Czech Republic). Each 3D model contains 4-14 reference points measured in the field by TS. The mean absolute difference between distances measured in 3D model and distances calculated from TS coordinates ranges between 1.9 and 15.0 mm. The error is highly dependent on the precision of TS measurement. The intra- and inter-observer error of 3D model measurements is low (0.2-1.0 mm). We propose that measurement in 3D model is as reliable as measurement by TS but 3D models can be used for spatial data acquisition after the skeleton is removed from the grave.
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