Domitilla Catacomb Walkthrough

Domitilla Catacomb Walkthrough

Claus Scheiblauer

Institute of Computer Graphics and Algorithms

Vienna University of Technology

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Complete Domitilla Model

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Outline

Scanopy – Point Rendering and Editing Software

Domitilla Catacomb Model

Demonstration

Conclusion

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Outline



Demonstration

Conclusion

Scanner Software (RiscanPro, ...)

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Point Model Processing Pipeline

Aquiring Points Registering Points Coloring Points

Set of Registered and Colored

Points

Scanopy Application

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Point Model Processing Pipeline

Remove OutliersMerge several

Scans to a Composed Model

View and Edit Composed Model

Set of Registered and Colored

Points

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Scanopy Application Capabilities

Fast elimination of outliersMerging of single scans to a composed modelBasic editing operations on the composed modelDefine camera paths“Unlimited” model sizeConcurrent display of polygon based models and point based models

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Scanopy Application Capabilities

Most useful during a scan campaign

Can provide an overview of already scanned areas

Quality of the models is limited, because no post processing is done

Work in progress…

Data Structure

Sophisticated data structure (NestedOctree)Optimized for rendering on GPU

Multi-threading, Out-of-Core, Caches, Levels-of-Detail

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Build Up

Out-of-core Points are inserted one-by-oneLeast Recently Used (LRU) cache to take advantage of spatial coherencyBuild Up algorithm is scaleable

Performance increases with available memory

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Build Up


OuterOctree

A

B C

InnerOctree InnerOctree

InnerOctree

Build Up

OuterOctree swapped partially to diskLRU cache decides which nodes are swapped



Elimination of Outliers

Interactive definition of a clipping box


Selection

Brush follows surface of the model


Dynamic Point Size

Estimate a closed surface on scanned objects

Point Size 1 pixel Dynamic Point Size


Scanopy



Demonstration

Conclusion

Domitilla Catacombe Model

START project „Domitilla Katakombe in Rom“Scanned during several campaigns (currently 8 finished)Model consists of 1.21 billion points1121 scan positions19.5 GB of data on diskColored within 4 days using 3 computers2h 45min to build up the model



Scanopy



Demonstration

Conclusion


Demonstration

Laptop with 2GHz Intel Core2 Duo processor2GB RAMNvidia GeForce 8600M GT graphics processor with 256MB VRAM5400RPM hard disk


Scanopy



Demonstration

Conclusion


Conclusion

Software for creating, viewing and editing very large point based models

Work in progressWalk through a model of the Domitilla Catacombe consisting of more than 1 billion pointsMore edit operations are future work


Thanks!

FFG Project “Scanopy”FWF START Project “Domitilla Katakombe in Rom” TUW-ILScan ProjectWWTF Project “LEOPOLD”

The End

Institute of Computer Graphics and Algorithms

Vienna University of Technology


Light Background Slides

The standard color scheme is light background with dark text – it must be used by defaultSelect “Format / Slide Design…” and “Color Schemes” on the right side panelBy right-clicking on a color scheme you can apply it to the current slide


Motivation

The quick brown fox jumps over the lazy masterThe quick brown fox jumps over the lazy dogThe quick brown master jumps over the lazy dog


Outline

The quick brown fox jumps over the lazy dogThe quick brown fox jumps over the lazy master

The quick brown fox jumps over the lazy dogThe quick brown fox jumps over the lazy dog

The quick brown fox jumps over the lazy master

The quick brown fox jumps over the lazy dog


Conclusions

The quick brown fox jumps over the lazy dogThe quick brown master jumps over the lazy dogThe quick brown fox jumps over the lazy dogThe quick brown master jumps over the lazy dogThe quick brown fox jumps over the lazy dog


Selection Octree

Enables selection in a LOD data structure

Domitilla Catacomb Walkthrough

Documents

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