Photogrammetry versus 3D scanner: producing
3D models of museums’ artifacts
Hashem Mohammad Khries
German Protestant Institute of Archaeology, Amman, Jordan
Abstract
Purpose – This paper aims to help archaeologists, museums’ curators and technicians in understanding the principle of using the photogrammetry
and 3D scanner for the museum archaeological objects in a practical way by presenting specific examples for both methods. Another purpose is to
evaluate the performance offered by the photogrammetry and the three-dimensional (3D) scanner device, with the aim of providing a suitable
solution to the different shapes and sizes of the archaeological objects.
Design/methodology/approach – The author used the camera Canon EOS 1300 D for photographing and Einscan Pro 2X Plus as a 3D scanning
device for several years on different kinds of objects made of various materials, including ceramic, stone, glass and metal.
Findings – This paper showed that both approaches create 3D models with high resolution in easy and different ways.
Practical implications – Handling objects and preparing them for photographing or scanning has involved a number of caveats and challenges
regarding the risk of damage that the author had to bear in mind.
Originality/value – This paper is completely based on the author’s personal experiences of creating 3D image of various objects in the project of
Documentation of Objects in the Jordanian Archaeological Museums.
Keywords Archaeology, Photogrammetry, 3D scanner, 3D modeling, Museology, Photoscan
Paper type Technical paper
Introduction
In cultural heritage studies, three-dimensional (3D) of an
object is a fundamental, practical and convenient step. It is a
process that starts from data acquisition, then converting a
measured point cloud into a network “mesh” or textured
surface and ends with a 3D virtual model on a computer
(Remondino and El-Hakim, 2006, p. 269). Photogrammetry
and 3D scanning technologies are used to replicate an object to
be used for several purposes digitally, including documentation
in case of loss or damage, visualization, carrying out analysis for
the restoration of the archaeological objects and printing 3D
replicas (Brutto and Meli, 2012, p. 1). In 2017, a four-year
cooperation project of the German Protestant Institute of
Archaeology and the Department of Antiquities of Jordan
called the “Documentation of Objects in the Jordanian
Archaeological Museums,” abbreviated as DOJAM was
started. The project aimed at protecting the cultural heritage of
Jordan by documentation, registration and digitization of the
archaeological objects in the Jordan Archaeological Museum at
the Amman Citadel. One part of the DOJAM project, however,
is creating photorealistic 3D models of selected objects; both
displayed and stored in the storages.
Several precautions concerning the protection of the object
must be taken into consideration before preparing it for
photographing or scanning. The most prominent threat to any
object is the physical damage during moving an object.
Therefore, careful object handling is an essential skill that a
curator or conservator shall develop to minimize the potential
damage on the objects. Object must not be carried by its
handles or other protruding parts (e.g. handle or spout of a jar
or jug), but from the bottom and the side. Large and heavy
objects should be moved with the help of a movable table or a
heavy load trolley (Roy and Perry, 1994, pp. 12–16). There is
no simple do and don’ts for the short-term movements and
each situation must be assessed independently. It should be
checked if the object is very fragile or some parts are broken off.
The curator or conservator should carry the object with both
hands (Miles, 1992, pp. 455–458). It is recommended to wear
gloves for the protection of the objects, especially the metal
ones (Caple, 2012).
Photogrammetry
Photogrammetry is part of the image-based modeling, of which
uses projective geometry to convert 2D images into 3D model
(Nister, 2004; Pollefeys et al., 2004). Camera calibration is an
essential component of photogrammetry measurements. A
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Collection and Curation
40/4 (2021) 153–157
© Emerald Publishing Limited [ISSN 2514-9326]
[DOI 10.1108/CC-06-2020-0021]
The author would like to express his sincere thanks to the Gerda Henkel
Foundation, the funder of the DOJAM project, of which funded their
project with cutting-edge tools and technologies. He would also like to
thank the Project Manager, Dr J. Häser, and the Director of the German
Protestant Institute of Archaeology in Amman, Dr Katharina Schmidt, to
facilitate training on objects in the institute. Hashem Mohammad Khries
appreciates the efforts of the curator of the Jordan Archaeological
Museum, Mr Taher al-Gonmeen, for his help and facilitating preparing
objects for photographing and scanning.
Received 24 June 2020
Revised 21 November 2020
Accepted 28 December 2020
153