A 3D MODEL BASED INDOOR NAVIGATION SYSTEM FOR HUBEI PROVINCIAL MUSEUM
W. Xu, M. Kruminaite, B. Onrust, H. Liu, Q. Xiong, S. Zlatanova
Previous projects
2006
2007
2008
2009 2010
2011
2008
2012
Synthesis project 2013
• The overall goal is a 3D multi-purpose indoor navigation application for the Hubei Provincial Museum
• 3D model of Wuhan• The first activity of the JRC Wuhan-TUDelft
Supervisors:• Edward Verbree• Qing Zhu, Sisi Zlatanova
Key issues
• Localisation• System architecture• Model & Database• Network & Navigation• User interface & Visualisation
System Architecture
System Components:
• Sever (DBMS) • Web services• Application (HTML&Unity)
Model and database
• One model for all: localization, navigation, 3D visualization (CityGML) and context information (exhibits)
• PostGIS:• Native geometric data type• Spatial index• Plenty spatial analysis functions, also in pgRouting module
Database Design and Implementation Relationships between tables
FunctionalitiesLocalizationNavigation3D VisualizationContext Service
CityGML existingNM
Network Extraction
Indoor research and applications
Claramunt and Ray., 2010
Bandi and Thalmann, 1998
Lorenz et al 2006
http://w5.cs.uni-sb.de/~stahl/yamamoto
Google Indoor on Mobile
3D Grid: fly over, fly under
Junqiao (John) Zhao, TUDelft
Surface for navigation
• Height of the storey• Filter all the bottom faces of doors,
walls and floors. • Clean the overlapping parts of those
bottom faces
manual
Network Extraction
Semi-automatic approach:• Constrained Delaunay Triangulation (Triangle Python library). • Center points of the triangles, doors and exhibits• Connecting center points of adjacent triangles, doors and
exhibits
3D Network Extraction
Navigation between floors stacking the layers of 2D
The vertical connections has to be created.
Height information has to be assigned to all nodes.
(not done)
(Till et al 2011)
3D Mobile visualization
Mobile visualization technology
• Local visualization– Graphic API: OpenGL ES and Mobile 3D Graphics
API– Game engine
• Remote visualization – Web visualization : HTML5 and WebGL
Pipeline of 3D visualization in Unity3D
Import 3D model
Create scenePath
visualizationExport to android
Route info (.txt)
Model(.dae)
User interface
User Interface
Main menu
Images show the exhibits. By pressing one of them, the route to them is then displayed in a 3D scene on the screen
Path Visualization
• The user’s location (starting point as red sphere).
• The path as pink line
Future Work
• Different user types in the application.• Extraction of 3D navigation network. • 3D model storage in the database.• Information about objects (exhibits) in the
mobile device.
Acknowledgements
Thank You!
Questions?