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New perspectives to save cultural heritage
Altan, M. Orhan

CIPA 2003 XIX th International Symposium, 30 September - 04 October, 2003, Antalya, Turkey
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• In contrast to digital recording, the resulting material of the
analogue reproduction can be stored for a minimum of 100
years without a special treatment - assuming an acceptable
By using a large format camera consisting of a special lens for
reproductions and the latest fine structured Kodak film, the
quality is near to the high end scanner material.
Of course the treatment of film is more expensive at the
beginning. Especially the step of digitising, which is done by a
specialized company, uses some time. But in the end the result
of the documentation is analogue for an archive and digital for
the further steps of publication.
The decision for the analogue way lead to assumptions and
calculations for an expectable quality. A film material with an
“resolution power” of 100 lines/mm would have about 5000dpi
resolution in a digital standard (100 lines * 25,4 = 2504
lines/inch, resolving power means that 2 lines can be separated,
therefore 2504 * 2 = 5008 lpi).
The quality of the digitised film is not as brilliant as the digital
reproduction, but the step of digitising is developing and may
be repeated - if necessary - with better technologies in future.
In order to report the size and the colours, different scales and
tables were used in a way that the photographed picture
consisted of the object, a scale in the height of the writings
surface, a scale in the height of the cover, an exact right angle
parallel to the film plane and a colour match table of Kodak.
The usage of scales in different heights was necessary because
the actual difference of these was up to 12 cm!
The camera position did not move from the first to the last
picture, in order to produce a homogenous material for the
ongoing production.
For the lighting studio flash tubes were used to treat the objects
carefully with this very short but strong lighting influence,
instead of using permanent lights.
The publishing process started with the digitising. Using a film
scanner for medium format films, the best quality delivered in
uncompressed files could be 75MB.
The aim of the publishing process is to distribute the produced
pictures via the internet - as soon as a supporting project can be
acquired - or with the help of CD-ROMs.
In case of the internet the picture sizes have to be reduced.
Guidelines for a useful preparation can be found at the library
of the University of Cologne [http://www.ceec.uni-koeln.de],
where the whole stock of ancient handwritings was published in
the internet and is accessible without restrictions.
A CD-Rom publication requires a useful programming and
presentation. Therefore an appropriate file format should be
The value, distribution and ideology of the portable document
file format - short PDF - guarantees a platform independent
and pointing to the future standard that is widely used for years
and scientifically acknowledged.
The possibility to program a simple user interface via the
supported Javascript features makes it suitable for educational
purposes. The important information can be highlighted and is
not disturbed by intricate buttons and menu structures.
The zoom function allows magnifications up to 500% of the
original size. This should be enough for the needs of research
and prevents the books from being moved and touched again.
The pictures are accompanied with scientific articles describing
the general history and the importance of the books. In the same
way interpretations of illustrations may be added to complete
the product.
A minimum of two languages is one objective of the project's