advertisement

3D Generalization Lenses for Interactive Focus Con

38 %
63 %
advertisement
Information about 3D Generalization Lenses for Interactive Focus Con
Education

Published on July 16, 2008

Author: autopilot

Source: authorstream.com

advertisement

3D Generalization Lenses for Interactive Focus + Context Visualization of Virtual City Models:  Matthias Trapp, Tassilo Glander, Henrik Buchholz, Jürgen Döllner Hasso-Plattner-Institut, University of Potsdam Germany 12th International Conference Information Visualization 9-11 July 2008 3D Generalization Lenses for Interactive Focus + Context Visualization of Virtual City Models Motivation – Virtual 3D City Models:  Motivation – Virtual 3D City Models Properties: Large number of objects High degree of visual detail Tool for communicate complex 3D geoinformation Numerous applications  Can lead to perceptional and cognitive overload Motivation – Generalized Virtual 3D City Models:  Motivation – Generalized Virtual 3D City Models [Glander, ACMGIS 2007, ICA WS 2008] Motivation – Combined Generalization Levels:  Motivation – Combined Generalization Levels Simple case: Single arbitrarily shaped, non-convex volume (lens shape) Two Levels of Abstraction (LOA) Model Complexity < 500 MB (Geometry + Textures) Context (LOA1) 3D Lens Shape Motivation – Combined Generalization Levels:  Motivation – Combined Generalization Levels Complex case: 3 intersecting lens shapes (multiple foci) Three Levels of Abstraction Model Complexity > 2GB Challenges: Interactive manipulation of lens shapes Combined usage (intersection, nesting) of multiple lenses Enabling arbitrary lens shapes Handling spatial data complexity Outline:  Outline Related Work Conceptual Overview Preprocessing & Focus + Context Mappings Real-Time Rendering Application Examples Future Work & Conclusions Related Work :  Related Work Interactive 3D Focus + Context Visualization with Lenses 3D Magic Lenses Viega et. al, UIST 1996 A Solution for the Focus and Context Problem in Geo-Virtual Environments Ropinski et. al, DMGIS 2005 Real-Time Volumetric Tests Using Layered Depth Images Trapp and Döllner, Eurographics 2008 Generalization 2D Building Simplification & Aggregation e.g., Mayer, ISPRS 1998 Single 3D Building Simplification e.g., Kada, ISPRS WS 2006 3D Cell-Based City Model Generalization Glander and Döllner, ACMGIS 2007 Our Approach: Conceptual Overview:  Our Approach: Conceptual Overview Preprocessing Phase: Create levels of abstraction (LOA) and volumetric depth sprites (VDS) Rendering Phase: Create / modify focus + context mapping: FNC = map(VDS, LOA) Real-time image synthesis: render(FNC) Automatic Generalization of Virtual 3D City Models:  Automatic Generalization of Virtual 3D City Models Input: City Model CM Output: Levels of Abstraction LOA Process: Preprocessing of Lens Volumes:  Preprocessing of Lens Volumes Input: Derived or modeled solid polygonal shapes: S Output: Volumetric Depth Sprites VDS Processing: Mapping Generalization Levels to Lens Volumes:  Mapping Generalization Levels to Lens Volumes Mapping for n lenses and generalization levels: Mapping Properties: Prioritized, hierarchical one-to-one mapping (i = priority) Additional attributes (colors, lens positioning & scaling,…) Mapping can be changed at run-time Real-time Rendering of Focus + Context Mapping:  Real-time Rendering of Focus + Context Mapping Multi-pass rendering + clipping against VDS: First pass: render context Successively: one pass per LOA Start with lowest priority: i = n Applications Examples & Usage Scenarios:  Applications Examples & Usage Scenarios Scene Lens with intersecting foci of multiple non-convex volumes Applications Examples & Usage Scenarios:  Applications Examples & Usage Scenarios Camera Lens with nested foci of the same convex volume Limitations & Future Work:  Limitations & Future Work Current conceptual limitations: Only one-to-one mapping possible Model complexity requires out-of-core rendering Clipping limitations: Under-sampling / aliasing artifacts No capping of clipped areas Future Work: Extend mapping mechanism: one-to-many Compensate sampling artifacts Enable capping of clipped areas Use cases that exploit technical potential Conclusions:  Conclusions Wrap-up: Concept + technique for combing different levels of generalization Two phase process: preprocessing + rendering Hierarchical focus + content mapping Interactive multi-pass rendering Potential for future work Thank You…:  Thank You… Contact: Matthias Trapp matthias.trapp@hpi.uni-potsdam.de Tassilo Glander tassilo.glander@hpi.uni-potsdam.de Henrik Buchholz henrik.buchholz@hpi.uni-potsdam.de Computer Graphics Systems Group Prof. Dr. Jürgen Döllner www.hpi.uni-potsdam.de/3d Researchgroup 3D-Geoinformation www.3dgi.de Main References:  Main References Glander, Döllner, Cell-Based Generalization of 3D Building Groups with Outlier Management, ACMGIS, 2007 Kada: 3D Building Generalization Based on Half-Space Modeling, Proceedings of the ISPRS Workshop on Multiple Representation and Interoperability of Spatial Data, 2006 Mayer: Model-Generalization of Building Outlines on Scale-Spaces and Scale-Space Events, International Archives of Photogrammetry and Remote Sensing, Vol. 33, 1998 Trapp, Döllner, Real-Time Volumetric Tests Using Layered Depth Images, Eurographics 2008

Add a comment

Related presentations

Related pages

3D Generalization Lenses for Interactive Focus + Context ...

for Interactive Focus + Context Visualization ... Application examples for 3D Generalization Lenses. ... for Interactive Rendering of 3D Magic Lenses ...
Read more

3D Generalization Lenses for Interactive Focus + Context ...

for Interactive Focus + Context ... Application examples for 3D Generalization Lenses. ... Algorithm for Interactive Rendering of 3D Magic Lenses.
Read more

3d generalization lenses for interactive focus + context ...

3d generalization lenses for interactive focus + context…:交互式焦点+上下文的三维综合镜头….pdf.
Read more

3D Generalization Lenses for Interactive Focus + Context ...

3D Generalization Lenses for Interactive Focus + Context Visualization of Virtual City ... Focus + context visualization facilitates the exploration of ...
Read more

3D Generalization Lenses for Interactive Focus + Context ...

... view based on one or more 3D lenses of arbitrary shape. Focus areas within lens ... 3D Generalization Lenses for Interactive Focus + Context ...
Read more

3D Generalization Lenses for Interactive Focus + Context ...

... 3D Generalization Lenses for Interactive Focus + Context ... have proposed a 3D generalization lens for the interactive F+C visualization ...
Read more

3D Generalization Lenses for Interactive Focus + Context ...

3D Generalization Lenses for Interactive Focus + Context Visualization of ... 3D Generalization Lenses for Interactive Focus + Context Visualization of ...
Read more

3D Generalization Lenses for Interactive Focus + Context ...

2008 12th International Conference Information Visualisation. ... 3D Generalization Lenses for Interactive Focus ... 3D generalization lenses, ...
Read more