Documentation of Rotationally Symmetric Archaeological Finds by 3D Shape Estimatimation (bibtex)
by Hurbert Mara
Abstract:
Tens of thousands of fragments of ceramics (called sherds for short) are found at every archaeological excavation site and have to be documented for further archaeological research. The traditional documentation is based on the profile line, which is the intersection of the sherd along the axis of symmetry in the direction of the rotational axis. Traditionally this is done by experts by manually drawing the profile line, using different tools like a Profilkamm (profile comb), flexible wires, circle- templates, etc. to estimate the axis of rotation and the profile line. The traditional drawing is error prone and time consuming, therefore a semiautomatic method using a Profilograph was introduced to increase accuracy. Since the measurement is still manually, the time for drawing was not decreased. We propose a fully automatic system for the estimation of the rotational axis and the profile line. For data-acquisition we are using acquisition methods based on the principle of structured light, which have also been compared in respect to accuracy and performance to traditional methods of documentation. Based on continuous experiments and comparisons we show a new method for estimation of the rotational axis and the profile line, which is inspired by traditional archaeological methods. The methods shown in this thesis were tested on synthetic and real data. The experiments with real data were done at the archaeological excavation in Tel Dor in Israel. The results for estimation of the profile line and the comparison between the manual drawings, the Profilograph and the 3D- acquisition by structured light are shown in this thesis. Furthermore methodological experiments of geometrical surface analysis are shown, which demonstrate the possibility of estimation of ancient manufacturing techniques of ceramics. Finally an outlook towards detection of lines and analysis of painted ceramics is given.
Reference:
Documentation of Rotationally Symmetric Archaeological Finds by 3D Shape Estimatimation (Hurbert Mara), Technical report, PRIP, TU Wien, 2006.
Bibtex Entry:
@TechReport{TR103,
  author =	 "Hurbert Mara",
  title =	 "Documentation of Rotationally Symmetric
                  Archaeological Finds by 3D Shape Estimatimation",
  institution =	 "PRIP, TU Wien",
  number =	 "PRIP-TR-103",
  year =	 "2006",
  url =		 "ftp://ftp.prip.tuwien.ac.at/pub/publications/trs/tr103.pdf",
  abstract =	 "Tens of thousands of fragments of ceramics (called
                  sherds for short) are found at every archaeological
                  excavation site and have to be documented for
                  further archaeological research. The traditional
                  documentation is based on the profile line, which is
                  the intersection of the sherd along the axis of
                  symmetry in the direction of the rotational
                  axis. Traditionally this is done by experts by
                  manually drawing the profile line, using different
                  tools like a Profilkamm (profile comb), flexible
                  wires, circle- templates, etc. to estimate the axis
                  of rotation and the profile line. The traditional
                  drawing is error prone and time consuming, therefore
                  a semiautomatic method using a Profilograph was
                  introduced to increase accuracy. Since the
                  measurement is still manually, the time for drawing
                  was not decreased. We propose a fully automatic
                  system for the estimation of the rotational axis and
                  the profile line. For data-acquisition we are using
                  acquisition methods based on the principle of
                  structured light, which have also been compared in
                  respect to accuracy and performance to traditional
                  methods of documentation. Based on continuous
                  experiments and comparisons we show a new method for
                  estimation of the rotational axis and the profile
                  line, which is inspired by traditional
                  archaeological methods. The methods shown in this
                  thesis were tested on synthetic and real data. The
                  experiments with real data were done at the
                  archaeological excavation in Tel Dor in Israel. The
                  results for estimation of the profile line and the
                  comparison between the manual drawings, the
                  Profilograph and the 3D- acquisition by structured
                  light are shown in this thesis. Furthermore
                  methodological experiments of geometrical surface
                  analysis are shown, which demonstrate the
                  possibility of estimation of ancient manufacturing
                  techniques of ceramics. Finally an outlook towards
                  detection of lines and analysis of painted ceramics
                  is given.",
}
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