1 / 46

Spatially Immersive Visualization Systems (an update)

Spatially Immersive Visualization Systems (an update). Prof. Frederic I. Parke Visualization Sciences Texas A&M University. Project History. ~1990 Air Force project @ NYIT ~1998 current concept (w/Ergun) 2000 CRIC funding (~$5k) 2002 TITF funding ($165k) 2005 NSF MRI funding ($500k).

bliss
Download Presentation

Spatially Immersive Visualization Systems (an update)

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Spatially Immersive Visualization Systems(an update) Prof. Frederic I. Parke Visualization Sciences Texas A&M University Visualization Sciences, Texas A&M University

  2. Project History • ~1990 Air Force project @ NYIT • ~1998 current concept (w/Ergun) • 2000 CRIC funding (~$5k) • 2002 TITF funding ($165k) • 2005 NSF MRI funding ($500k) Visualization Sciences, Texas A&M University

  3. Spatially Immersive Systems • Multiple images projected on surrounding surfaces • Often use stereo images • (active) Sequential images • (passive) Dual stereo images • Provide interaction modes • May use position tracking Visualization Sciences, Texas A&M University

  4. Example -‘Cave’ Systems • up to 6 surfaces of a small room or cubical environment • typically systems use only 3 or 4 walls Visualization Sciences, Texas A&M University

  5. Immersive Environments Major Components • the computational “fabric” • the display “surfaces” • user interaction and tracking Visualization Sciences, Texas A&M University

  6. Visual Computing Clusters • Extended Cluster Concept • Use ‘visual’ computing nodes • Each computational node has a graphics processor • Each node drives a small ‘facet’ of the total display surface Visualization Sciences, Texas A&M University

  7. Related Prior Work • Tiled Displays/PowerWalls • Princeton • Argonne National Lab • UNC-CH • Multi-Graphics Project • Stanford Visualization Sciences, Texas A&M University

  8. What’s the ‘Ideal’ Display Surface? • Is probably task specific • One concept is a seamless surrounding sphere with high resolution wrap around dynamic images, high update rate, and high complexity modeled environments Visualization Sciences, Texas A&M University

  9. Display Geometries • We want better geometric approximations to the ‘ideal’ sphere • The CAVE is a poor approximation • A number of polyhedron configurations are better Visualization Sciences, Texas A&M University

  10. Polyhedron Display Systems • Multiple display facets • Each facet driven from one (or two) visual computing node • Low cost per facet • High aggregate performance • High aggregate resolution Visualization Sciences, Texas A&M University

  11. Our configuration of interesta 24 facet polyhedron Trapezoidal Icositetrahedra Visualization Sciences, Texas A&M University

  12. 24 Facet polyhedron as approximation to a sphere Visualization Sciences, Texas A&M University

  13. 24 Facet projector placement Visualization Sciences, Texas A&M University

  14. Simulated cross-sectional view of a 5 meter 24 facet display environment Visualization Sciences, Texas A&M University

  15. Another possible configurationa 60 faceted polyhedra Pentagonal Hexcontahedra Visualization Sciences, Texas A&M University

  16. Our objectives • Useful and effective • Integration into ‘workflows’ • ‘Low’ cost • Commodity components • Reasonable performance Visualization Sciences, Texas A&M University

  17. Challenges • Software Development/Integration • Distributed Data Management • Workflow Integration • Display Synchronization / Stereo Display • Physical Structure/Environment • Suitable Projection Systems • Display Calibration Visualization Sciences, Texas A&M University

  18. Stereo Display Passive anaglyphic – red /cyan (one proj) polarization (two projectors) Visualization Sciences, Texas A&M University

  19. Physical Structures Screen frame design Minimal ‘seams’ Projector placement Optical folding Projector mounts Heat ‘ripples’ Screen materials Optical properties Visualization Sciences, Texas A&M University

  20. Image Compensation • Geometric correction • off axis & projector distortion • ‘Image stability’ • explored several approaches • Intensity / color correction Visualization Sciences, Texas A&M University

  21. TheProblem Image alignment on individual projectors We Want… We Get… Visualization Sciences, Texas A&M University

  22. Basic Approach • Compute the correct image • Use as texture on a poly mesh • Pre-distort mesh to compensate for geometric projection distortion Visualization Sciences, Texas A&M University

  23. GPU based solutions • Instead of relying on OpenGL default texturing, control the warping through the GPU • Create a 2D displacement texture • Access the displacement texture to get an offset, then access the image with the UV coordinates and the offset Visualization Sciences, Texas A&M University

  24. GPU based extensions Color correction Easy to hue/color shift texel values Brightness correction Easy to adjust the brightness of texels Intensity falloff correction by altering brightness based on a grayscale calibration image Visualization Sciences, Texas A&M University

  25. Structural Prototypes We have developed a series of structural prototypes We learned something from each! Visualization Sciences, Texas A&M University

  26. 3/10 scale physical model using 24 identical facets Visualization Sciences, Texas A&M University

  27. 3/10 ScalePrototype Architecture Building Atrium ~ 5’ diameter (Mid – 2001) Visualization Sciences, Texas A&M University

  28. ¾ Scale Presentation Prototype Completed May 2002 Visualization Sciences, Texas A&M University

  29. Half of 24 facet structural frame Visualization Sciences, Texas A&M University

  30. Structure with projected images Visualization Sciences, Texas A&M University

  31. Series of Development Systems • 3 screen prototypes 3/4 scale and full scale • 5 screen prototype (full scale) • 7 screen prototype (1/2 scale) (Currently in development) • Software (two generations) ‘3Dengine’ and ‘Guppy3D’ Visualization Sciences, Texas A&M University

  32. Rear view of 4 screen structure section Visualization Sciences, Texas A&M University

  33. Initial 3 facet development system in use Visualization Sciences, Texas A&M University

  34. Alternative 3 Facet System Visualization Sciences, Texas A&M University

  35. Operational 5 Facet System Visualization Sciences, Texas A&M University

  36. Next – Two 7 Facet Systems Visualization Sciences, Texas A&M University

  37. Budget for each 7 Facet System • 7 x $17.75k = ~$124k • plus ~ $36k for a control/interface computer, interaction devices, networking, sound, installation, etc… • Total ~ $160k Visualization Sciences, Texas A&M University

  38. Per Facet Budget (2005) For each facet ~ $17.75k • 2 Visual computing nodes ~ $9k • 2 Display projectors ~ $3.5k • Screen and structure ~$3.8k • Misc. components ~$1.45k Visualization Sciences, Texas A&M University

  39. Application Projects • Architecture ‘Ranch’ • Montezuma Castle A Visualization Sciences, Texas A&M University

  40. Architecture ‘Ranch’ Visualization Sciences, Texas A&M University

  41. Architecture ‘Ranch’ on 3 facet system Visualization Sciences, Texas A&M University

  42. Architecture Ranch on the 5 facet system Visualization Sciences, Texas A&M University

  43. Montezuma Castle A Visualization Sciences, Texas A&M University

  44. Montezuma Castle A Visualization Sciences, Texas A&M University

  45. Montezuma Castle A Visualization Sciences, Texas A&M University

  46. Visualization Sciences, Texas A&M University

More Related