NavOScan: Hassle-free handheld 3D scanning with automatic multi-view registration based on combined optical and inertial pose estimation

C. Munkelt, B. Kleiner, T. Thorhallsson, C. Mendoza, C. Bräuer-Burchardt, P. Kühmstedt, G. Notni

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Portable 3D scanners with low measurement uncertainty are ideally suited for capturing the 3D shape of objects right in their natural environment. However, elaborate manual post processing was usually necessary to build a complete 3D model from several overlapping scans (multiple views), or expensive or complex additional hardware (like trackers etc.) was needed. On the contrary, the NavOScan project[1] aims at fully automatic multi-view 3D scan assembly through a Navigation Unit attached to the scanner. This light weight device combines an optical tracking system with an inertial measurement unit (IMU) for robust relative scanner position estimation. The IMU provides robustness against swift scanner movements during view changes, while the wide angle, high dynamic range (HDR) optical tracker focused on the measurement object and its background ensures accurate sensor position estimations. The underlying software framework, partly implemented in hardware (FPGA) for performance reasons, fusions both data streams in real time and estimates the navigation unit's current pose. Using this pose to calculate the starting solution of the Iterative Closest Point registration approach allows for automatic registration of multiple 3D scans. After finishing the individual scans required to fully acquire the object in question, the operator is readily presented with its finalized complete 3D model! The paper presents an overview over the NavOScan architecture, highlights key aspects of the registration and navigation pipeline and shows several measurement examples obtained with the Navigation Unit attached to a hand held structured-light 3D scanner.

Original languageEnglish
Title of host publicationOptics for Arts, Architecture, and Archaeology IV
DOIs
Publication statusPublished - 2013
EventOptics for Arts, Architecture, and Archaeology IV - Munich, Germany
Duration: 15 May 201316 May 2013

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume8790
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceOptics for Arts, Architecture, and Archaeology IV
Country/TerritoryGermany
CityMunich
Period15/05/1316/05/13

Other keywords

  • Handheld sensor
  • Inertial measurement unit
  • Optical 3D reconstruction

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