The equipment used ‚was the Camera
Rolleiflex 3003, with 60 mm lens, colored
film and control points with the theodolite
T-2, Wild. The restitution in the
Analytical Plotting System PLANICOMP C-100,
ZEISS.
2.1- Digital Method-Remote Sensing
The Close-Range Photogrammetry improves
the surveying of the rock painting 3
because it decreases the manual work time
spent on the site and increase the accuracy.
Although it is not enough for complete
documentation; for exemple it can not
register colors and super imposed forms .
The digital method for analysing rock
painting can be divided into three parts:
a) colored pictures of the chosen
Scenes were taken;
b) the pictures taken were digitylized
by the SCANNER EPSON, that belongs to the
Photogrammetry and Remote Sensing Institut
of University of Karlsruhe German;
c) the images were processed by
digital ERDAS system that belongs to the
Cartographic Engineering Department.
This system allowed the reconstruction
of original colors through the digitalization
of three different channels with green,red
and blue filters.
3, RESULTS
From this Close-Range Photogrammetry we
got the tridimensional coordenated panel.
It is possible.from this to draw.ali the
rock paintings or to draw each one
separately in different scales or in its
original síze. The figure 3 shows the
rock painting from "FURNA DOS CABOCLOS".
From the digital process we can also
highlight the rock painting against the
bachground. The figure ^ shows the
result.
4. CONCLUSION
As a result of this research we can claim
that the use of Close-Range Photogrammetry
is important because it decreases the hard
work in the field replacing the old hand
method copying in transparent plastic
sheets. It also allows us to save the
information into computer systems.
The Remote Sensing helps to analyse the
colors used in the rock paintings and we
hope to be able to classify them
automatically in the future,
5. ACKNOWLEDGMENTS
The author acknowledges the assistence of
Professor Hans-Peter Bahr, during my stay
in Universitat Karlsruhe - Institut für
Photogrammetrie und Fernerkundung.
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