3D modelling of prehistoric stone State of the art ­ Comparative study

Quentin Borderie – Univ.Paris 1 – UMR 7041 1 3D modelling of prehistoric stone tools State of the art – Comparative study

FOVEA project: virtual excavation of a palaeo­anthropological environment: ­ reconstruction of the environment ­ digitalization of fossils and artefacts

archaeological environment Device prehistoric artefacts

Instrumentation Polytech'Nice March – June 2004 Visualisation PhD school ­ Image/Vision Master thesis

2 Q. Borderie – 08/06/20 3D modelling of prehistoric stone tools State of the art – Comparative study

State of the art Which purposes for stone tools modelling?

Which stone tools to digitalize? Comparative study Digitalization of : the first step? On­line databases Digitalization of a Chopping and a

CT scan – Laser scan

Comparative approach

3 Q. Borderie – 08/06/20 3D modelling of prehistoric stone tools State of the art – Comparative study

Purposes for stone tools modelling

Exhibition Communication ­ Education

Archaeological environment

Refitting

Park, Nowell, Metaxas 2003 Classification Shapes Complex surfaces Flake scare, traces…

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Digitalization of pottery: the first step?

Symmetrical shapes: rotation Smooth edges

Razdan et al., ASU, 2003

Mara, Kampel, Sablatnig 2002

Hypothesis: numerization problems on sharp edges?

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On­line databases

Projects: DANA TNT

x Exhibition x x

Communication x x x Education Archaeological x Environment Refitting x

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Digitalization of a Chopping tool and a Chopper

High definition moulding

Chopping tool ­ two side edged core Sharpe end Flake edge Chopper ­ one side edged core stone tool

Roughly spherical Terra Amata, Nice (06) 400 ky old

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CT scan – Laser scan

Cyberware 3030 3D color digitizer and software

Minolta Vivid

SOMATOM Sensation Cardiac

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Comparative approach

ICP fitting

Displacement vectors

9 Q. Borderie – 08/06/20 3D modelling of prehistoric stone tools State of the art – Comparative study

Comparative approach

Mean model

Edges

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Conclusions

Laser scanner: ­ noise (granularity of texture) ­ obscuration: view refitting

Stone tool refitting Automated processes ­ coupling: spatial – shape ­ classification – ICP methods

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