Research

3D SHAPE MEASUREMENT BY SWEEPING HAND-HELD LIGHT STRIPING RANGE FINDER

  • Hirofumi Nakai,Daisuke Iwai,Kosuke Sato, 3D Shape Measurement by Sweeping Hand-held Light Striping Range Finder FINDER, 22nd CIPA Symposium (CIPA2009), pp. *-* (2009)

3D SHAPE MEASUREMENT BY SWEEPING HAND-HELD LIGHT STRIPING RANGE FINDER
  This paper presents a novel hand-held 3D scanning system using a fixed camera and a 1D time-of-flight (TOF) range scanner. A userof the system sweeps the target object with the slit light projected from the scanner. The system obtains sets of the measured range dataand captured image of the projected slit light. Our objective is to estimate the rigid-body transform of the scanner in a world coordinatesystem at each capture frame. To achieve this, we select pairs of corresponding points between the captured slit light and the measuredrange data, and estimate the transform that minimizes a sum of point-to-point distances of the pairs with an ICP algorithm. Once thetransform is estimated, all the range data are transformed in the world coordinate system, and merged into an entire surface shape ofthe target object. We built a prototype system and conducted proof-of-concept experiments to verify the proposed method.
  

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Aiming to Go beyond Archaeological Horizons: 3D Data of Pyramids and Their Interpretations

  • Yukinori Kawae, Hiroyuki Kamei, Kosuke Sato, "Aiming to Go beyond Archaeological Horizons: 3D Data of Pyramids and Their Interpretations", 22nd CIPA Symposium (Digital Documentation, Interpretation & Presentation of Cultural Heritage), No. 221, Oct. 11-15, Kyoto, (2009).

Aiming to Go beyond Archaeological Horizons: 3D Data of Pyramids and Their Interpretations
  Since the 1980’s, Ancient Egypt Research Associates Inc. (AERA) led by Dr. Mark Lehner has produced detailedarchaeological mappings of the whole Giza plateau in Egypt. In 2006, AERA collaborated with a Japanese consortium toestablish the Giza Laser Scanning Survey (GLSS) for the production of detailed 3D models of monuments at Giza for scholarlyand scientific studies, recording the current restorations, and monitoring the monuments long term. The GLSS team eventuallyachieved the production of a 3D model of the tomb of Queen Khentkawes [I] who may have reigned over Egypt around 4,500BCE. In 2008 according to the request of Dr. Zahi Hawass, the secretary general of Egypt’s Supreme Council of Antiquities,AERA formed the Saqqara Laser Scanning Survey (SLSS) team from mainly the GLSS members but additionally recruited 3Dlaser specialists from DEVELO Solutions of Osaka, Japan in order to conduct of the laser scanning of Egypt’s oldest pyramidand first gigantic stone monument for archaeological detailed 3D documentation. The laser survey is part of the salvagearchaeology and restoration of the Step Pyramid in the face of threats from centuries of erosion and the fragility of the stoneand clay body of the pyramid. The SLSS survey of the Step Pyramid helps commemorate 2008 as the “Japan-Egypt Year ofScience.”
  

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PHOTO BROWSING SYSTEM FOR SHARING INFORMATION IN ARCHEOLOGICAL RESEARCH

  • Y. Takata, I. Kanaya, K. Sato, "Photo Browsing System for Sharing Information in Archeological Research", In Proceedings of VSMM 2008, p122−123 (2008)

PHOTO BROWSING SYSTEM FOR SHARING INFORMATION IN ARCHEOLOGICAL RESEARCH
  Archaeologists have been using photographs and maps for planning and reviewing their research at their meeting. However,selecting proper photographs from the collection of field photographs is somewhat time consuming and non-productive. Even worse,the individually taken photographs don't have direct relationship to the map. This means that the archaeologists must put thephotographs on the map with proper direction manually for sharing circumstances of the site.In this paper we present a novel system for interactive browsing/exploring photographs, from pile of photographs, that areautomatically located on the map. The experimental result shows effectiveness of the proposed system in terms of sharinginformation in archaeological research.
  

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