A practical structured light acquisition system for point-based geometry and texture

  • Authors:
  • Filip Sadlo;Tim Weyrich;Ronald Peikert;Markus Gross

  • Affiliations:
  • Computer Science Department, Swiss Federal Institute of Technology (ETH), Zürich, Switzerland;Computer Science Department, Swiss Federal Institute of Technology (ETH), Zürich, Switzerland;Computer Science Department, Swiss Federal Institute of Technology (ETH), Zürich, Switzerland;Computer Science Department, Swiss Federal Institute of Technology (ETH), Zürich, Switzerland

  • Venue:
  • SPBG'05 Proceedings of the Second Eurographics / IEEE VGTC conference on Point-Based Graphics
  • Year:
  • 2005

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Abstract

We present a simple and high-quality 3D scanning system based on structured light. It uses the common setup of a video projector, a computer-controlled turntable and a single camera. Geometry is acquired using a combination of Gray code and phase-shift projections, and it is stored and processed in a point-based representation. We achieve high accuracy by careful calibration of camera, projector, and turntable axis. In addition, we make use of the projector's calibration and extend it to a calibrated light source, allowing for a simple reconstruction of material properties for each surface point. We alternatively use a Lambertian reflectance model, or fit a Phong reflectance model to the samples under different turntable orientations. The acquisition pipeline is entirely point-based, avoiding the need of triangulation during all processing stages.