Towards Creating a Dialogue Between the Specialized Technician and Non Technician Users of the 3d Laser Scanner

Topics: 3D scanner, 3D modeling, Point cloud Pages: 21 (6086 words) Published: January 17, 2013
XXI International CIPA Symposium, 01-06 October, Athens, Greece

Towards Creating a Dialogue between the Specialized Technician and non Technician Users of the 3D Laser Scanner

Naif Haddad
Department of Conservation Science, Queen Rania Institute of Tourism and Heritage, the Hashemite University, Zarqa 13115, Jordan, E-mail:
Key Words: Laser scanning, Generalization, Recording, Simplification, Accuracy, User, Understanding, Point Cloud.

Several attempts and case studies had been conducted to document the cultural heritage using the 3D Laser scanner in the last few years. Now, it is possible to furnish a virtual model of an object from the pointcloud and to complete the direct measurements, just like if the user were physically present on the site. While the main users of this method are technical people (not archaeologist), the results of these studies could not be easily understood and clearly appreciated from a majority of the people involved in the process of documentation for the archaeological sites and monuments. By reviewing the latest articles and case studies of 3D laser scanner in heritage documentation, we can establish now, some general rules and recommendations, mainly for the non technical users involved in the process of this new documentation method and according to their actual needs. This paper attempts to present and evaluate the recently 3D laser scanner achievements and results in heritage documentation to create a dialogue between the specialized technician and non technician users, in order to decrease the gap and to build a bridge between them, taking into consideration the following factors: 1-Kind and type of the structure.2- Material and texture.3-Scale of the structure 4- Acquisition time in the field and the number of the required scan positions. 5- Data post processing time in the lab. 6- Accuracy and precision. 7- Benefit ratio and cost.

Today, the laser scanners are widely used in the field of
architectural, archaeological and environmental surveying
because of their practicality and flexibility. They represent today the most advanced technology available for measuring
and documenting objects. Terrestrial laser scanning
technology is based on active range sensors measuring
directly the distance between the sensor and points over the surveyed object [10]. With its automated data capture
capabilities, it is bringing new perspectives and can satisfy most requirements of those types of applications.
Two different principles for distance measurement are in use: Lasers using the “time-of-flight” principle and instruments using CCD cameras, where distance measurement is based on
the principle of “triangulation” [11]. The triangulation method is most useful for smaller objects, while time-offlight method is most useful for large objects. Objects recorded include statues, a sculptural arrangement, an

unearthed wood structures and architectural facades and
complexes. However, we can assume that laser scanning is a
valuable new tool for cultural heritage documentation and
one which will complement, and, in certain applications,
replace currently some of the existing methods
It is a fact that, photographic and non-photographic (graphic) documentation tools are merging in one process, in which the digital photographic technology is the main base. However,

by the 3D digital technology, actually, there is an increasing gap between the specialized technician and non technician
users, involved in the cultural heritage documentation.
Although the 3D model provides a correct and complete
documentation of the object, 3D supports are still not popular among users in cultural heritage; it is not a so easy tool to deal with by unskilled users.
However, the aspects, which most involve the user, are both...

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