INTEGRATION of AERIAL, MMS, and BACKPACK IMAGES for SEAMLESS 3D MAPPING in URBAN AREAS

Z. Li, B. Wu (Corresponding Author), Y. Li

Research output: Journal article publicationConference articleAcademic researchpeer-review

Abstract

Photorealistic three-dimensional (3D) models play an indispensable role in the spatial data infrastructure (SDI) of a smart city. Recent developments in aerial oblique photogrammetry, and the popularity of terrestrial mobile mapping systems (MMSs) offer possibilities for deriving 3D models with centimeter-level accuracy in urban areas. Additionally, advances in image matching and bundle adjustment have allowed 3D models derived from the integration of aerial and ground imagery to overcome typical problems related to 3D mapping in urban areas (e.g., geometric defects, blurred textures on building façades). Nevertheless, this approach may not be suitable for all scenarios owing to innate differences between each platform. Besides, MMS images may not cover regions that cannot be reached by mobile vehicles in urban areas (e.g., narrow alleys, areas far from roads). Meanwhile, backpack systems have garnered attention from the photogrammetry community in recent years due to their flexibility, and regions neglected in previous works can be adequately reconstructed from images collected by backpack systems. This paper presents an approach for effectively integrating multi-source images collected by aerial, MMS, and backpack platforms for seamless 3D mapping in urban areas. The approach includes three main steps: (1) data pre-processing, (2) combined structure-from-motion, and (3) optimal generation of a textured 3D mesh model. The experimental results using aerial, MMS, and backpack datasets collected in a typical urban area in Hong Kong demonstrate the promising performance of the proposed approach. The described work is significant for boosting various types of imagery for integrated 3D mapping in both city scale and street level to facilitate various applications.

Original languageEnglish
Pages (from-to)443-449
Number of pages7
JournalInternational Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives
Volume43
Issue numberB2
DOIs
Publication statusPublished - 6 Aug 2020
Event2020 24th ISPRS Congress - Technical Commission II - Nice, Virtual, France
Duration: 31 Aug 20202 Sep 2020

Keywords

  • 3D Mapping
  • Aerial
  • Backpack
  • MMS
  • Photogrammetry
  • Urban

ASJC Scopus subject areas

  • Information Systems
  • Geography, Planning and Development

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