A system for high-volume acquisition and matching of fresco fragments

  • Brown B
  • Toler-Franklin C
  • Nehab D
 et al. 
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Abstract

Although mature technologies exist for acquiring images, geom- etry, and normals of small objects, they remain cumbersome and time-consuming for non-experts to employ on a large scale. In an archaeological setting, a practical acquisition system for routine use on every artifact and fragment would open new possibilities for archiving, analysis, and dissemination. We present an inexpensive system for acquiring all three types of information, and associated metadata, for small objects such as fragments ofwall paintings. The acquisition system requires minimal supervision, so that a single, non-expert user can scan at least 10 fragments per hour. To achieve this performance, we introduce new algorithms to robustly and au- tomatically align range scans, register 2-D scans to 3-D geometry, and compute normals from 2-D scans. As an illustrative applica- tion, we present a novel 3-D matching algorithm that efficiently searches for matching fragments using the scanned geometry. 1

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Authors

  • Benedict J. Brown

  • Corey Toler-Franklin

  • Diego Nehab

  • Michael Burns

  • David Dobkin

  • Andreas Vlachopoulos

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