Open AccessSFM TECHNIQUE AND FOCUS STACKING FOR DIGITAL DOCUMENTATION OF ARCHAEOLOGICAL ARTIFACTS
Author(s) -
Paolo Clini,
N. Frapiccini,
Maura Mengoni,
Romiespeca,
L. Ruggeri
Publication year - 2016
Publication title -
the international archives of the photogrammetry, remote sensing and spatial information sciences/international archives of the photogrammetry, remote sensing and spatial information sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.264
H-Index - 71
eISSN - 1682-1777
pISSN - 1682-1750
DOI - 10.5194/isprsarchives-xli-b5-229-2016
Subject(s) - computer science , photogrammetry , documentation , focus (optics) , structure from motion , triangulation , laser scanning , computer vision , representation (politics) , artificial intelligence , computer graphics (images) , cultural heritage , depth of field , level of detail , motion (physics) , archaeology , geography , laser , optics , physics , cartography , politics , law , political science , programming language
Digital documentation and high-quality 3D representation are always more requested in many disciplines and areas due to the large amount of technologies and data available for fast, detailed and quick documentation. This work aims to investigate the area of medium and small sized artefacts and presents a fast and low cost acquisition system that guarantees the creation of 3D models with an high level of detail, making the digitalization of cultural heritage a simply and fast procedure. The 3D models of the artefacts are created with the photogrammetric technique Structure From Motion that makes it possible to obtain, in addition to three-dimensional models, high-definition images for a deepened study and understanding of the artefacts. For the survey of small objects (only few centimetres) it is used a macro lens and the focus stacking, a photographic technique that consists in capturing a stack of images at different focus planes for each camera pose so that is possible to obtain a final image with a higher depth of field. The acquisition with focus stacking technique has been finally validated with an acquisition with laser triangulation scanner Minolta that demonstrates the validity compatible with the allowable error in relation to the expected precision.