Consolidator Technique: Digital
Image Analysis for Ancient Monument Reconstruction and Atlas Creation
Shchigorets S.B., Doos A.A., Zhabko
A.P., Dr.Sci., Grishkin V.M., Ph.D. , Petersburg State University, Russia Conference Presentation
This communication reports the results of development and application
of techniques for digital image analysis for monument reconstruction
in order to improve quality and effectiveness of archeological
investigations and create cultural atlases.
During archeological excavations in Egypt, researchers find scattered
fragments of ancient stone monuments. Putting fragments together
to reconstruct a whole monument is a challenge. Some fragments
may be located in a museum, while others may still be kept in boxes
at the excavation site or be in other museums or private collections
worldwide.
Today, experts sort and match fragments manually. We suggest a
solution:
- We need to identify missing parts of a monument among scattered
fragments.
- We make digital images of the monument surface adjacent to
the missing parts (a reference standard) and digital images of
fragments to be tested and matched with the reference.
- We develop software and algorithms for image processing and
analysis.
- We process the reference image using the software and algorithms
and obtain a set of parameters for sorting and comparing available
images.
- We create an atlas of images to compare the reference image
with images from the database and identify similar images - missing
parts.
Our software and algorithms facilitate and
speed up sorting and matching of stone fragments. Digital images
are processed using a program that calculates mean colours that
are “fingerprints” or
unique features of stone fragments.
While comparing these parameters, we subdivide all fragments into
colour groups, to facilitate image matching.
This interactive technique ensures ordering of scattered fragments
into clusters. The clusters are grouped according to objective
characteristics: colour tint, brightness, intensity. This technique
ensures reliable reconstruction of monument parts or whole monuments
from fragments.
The technique is suggested for the first time for application in
archaeological excavations in Egypt. It was tested by authors on
Egyptian materials. As the project evolves, the database and atlas
of images will expand and incorporate specific data on fragments
of Egyptian monuments. This database and atlas can be made
available for researchers on the Internet or on CD-ROM.
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