Documentation of the most important petroglyphs by structured light scanning and analysis of the most damaged petroglyphs by vPTM and vRTI methods

Jacek Kościuk, Małgorzata Telesińska, Maciej Nisztuk, Marta Pakowska

doi:10.37190/arc200207

Abstract

The case being studied is one of Bolivia’s most important monuments – El Fuerte de Samaipata, a UNESCO World Heritage Site. This paper proposes a new workflow for the two most important aspects of studies on cultural heritage – detailed documentation and analysis. The former includes the well-known techniques of digital photogrammetry and structured light scanning. The latter comprises polynomial texture mapping (PTM) and reflectance transformation imaging (RTI), both of which have been used since the beginning of this century. The novelty proposed by the authors is the transfer of part of the data collection process from the physical environment to the virtual space.     Despite some technical problems, by eliminating the tedious and time-consuming process of shooting photos in the field using specific lighting angles, this new workflow proved to be very efficient, particularly in documenting and interpreting badly preserved examples of bas-relief rock art.

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