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Augmented Reality with .NET

Augmented Reality with .NET. casey chesnut brains-N-brawn.com Wisconsin .NET UG November 2007. Source. http://www.brains-N-brawn.com/wpfAugReal/ Environment : 32-bit Vista, VS 2005, .NET 3.0, Logitech QuickCam Pro Web Cam for Notebooks. brains-N-brawn.com. Pervasive Computing

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Augmented Reality with .NET

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  1. Augmented Reality with .NET casey chesnut brains-N-brawn.com Wisconsin .NET UG November 2007

  2. Source • http://www.brains-N-brawn.com/wpfAugReal/ • Environment : 32-bit Vista, VS 2005, .NET 3.0, Logitech QuickCam Pro Web Cam for Notebooks

  3. brains-N-brawn.com • Pervasive Computing • Tablet PC (MVP 03) • Compact Framework (MVP 04) • Advanced Web Services (MVP 05) • Media Center (MVP 06) • Speech / Office Communication Server (MVP 07) • Location Based Services • Artificial Intelligence • 3D • Image Processing • Augmented Reality

  4. Audience • DirectShow? • 3D? • WPF? • Augmented Reality?

  5. Outline • Intro to Augmented Reality • DirectShow • AR Libraries • WPF 3D

  6. Introduction • Augmented Reality (AR) - is the combination of real world data with virtual data.

  7. Audience • What are some current examples?

  8. Current Examples • Pilot HUDs • QuickCam video conferencing • PS3 Eye of Judgment • Sports : Football, Hockey, Nascar • Aircraft maintenance • ARQuake • Star Wars chess • …

  9. Videos • QuickCam • Eye of Judgment

  10. Steps • Acquire real-world data (camera, HMD, mobile devices) • Recognize real-world data (computer vision, face detection, fudicial markers) • Determine relative position of real-world marker to input source. • Display composite of real-world data and virtual object (monitor, HMD, mobile device, projector).

  11. Acquire real-world data • OpenCV / SharperCV • DirectShow / DirectShow .NET • Windows Media Foundation • …

  12. DirectShow • Used by Windows Media Player, Media Center Edition, Windows Media Encoder, Movie Maker, … • User for audio/video playback, DVD, TV tuners, web cams, media capture, media transcoding, …

  13. DirectShow • COM • GraphEdt tool • Graph, Filter, Pin, Configuration • Filters (Source, Transform, Sink) • DirectShow .NET (C# wrapper) • http://directshownet.sourceforge.net/ • Learning the filters is key • Not WPF 3D friendly

  14. DirectShow .NET • C# wrapper • Wraps a majority of DirectShow • Many samples available, along with GraphEdt.exe, and MSDN documentation • Also has wrappers for Windows Media Lib and Windows Media Foundation

  15. Demo • GraphEdt • /dshowPlay • /wpfArBasic - capture

  16. Recognize real-world data • OpenCV • Face detection • AR Libraries (fudicial markers) • …

  17. AR Libraries • ArToolKit • ArTag • ArToolKitPlus • http://studierstube.icg.tu-graz.ac.at/handheld_ar/artoolkitplus.php • Studierstube Tracker • Goblin XNA (coming)

  18. ArToolKitPlus • Optimized for mobile devices • C++ Lib • GPL, no longer under development • Not well documented, but ArToolKit is • Single, Multi-config, Multi-distinct tracking • Markers (ID, BCH, Patterns)

  19. Videos • ARTag Magic Lens • Studierstube Mobile

  20. Demo • /wpfArBasic – AR tracking • /wpfArTest

  21. Composite real and virtual data • GDI • OpenGL / Tao • Direct3D • XNA • WPF 3D • …

  22. WPF 3D • Viewport3D • MatrixCamera • Light • ModelVisual3D / Model3DGroup • Material • Transform3D • HitTest

  23. WPF 3D • 3D Programming for Windows (Petzold) • Windows SDK Samples

  24. Demo • /wpfArBasic – 3D model • /wpfArVideo

  25. Future • Augmented Reality @ Home (book) • Mostly OpenGL and C++, but at least one C# and Tao sample. Based on ArTag library. • Goblin XNA (AR library) • For PC use, not on 360 until XNA is extended • …

  26. Questions

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