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Immersive Visualization and Analysis of Ground Penetrating Radar Data

By Matthew Sgambati. Immersive Visualization and Analysis of Ground Penetrating Radar Data. Committee. 2 of 84. Dr. Daniel Coming Dr. Frederick C. Harris, Jr. Dr. Nicholas Lancaster. Overview. Background The Project Software Specification and Design Process Implementation Results

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Immersive Visualization and Analysis of Ground Penetrating Radar Data

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  1. By Matthew Sgambati Immersive Visualization and AnalysisofGround Penetrating Radar Data

  2. Committee • 2 of 84 Dr. Daniel Coming Dr. Frederick C. Harris, Jr. Dr. Nicholas Lancaster

  3. Overview • Background • The Project • Software Specification and Design Process • Implementation • Results • Conclusion • Future Work

  4. Sand Dunes Background Background Sand Dunes Ground Penetrating Radar and Brunton Compass Volume Rendering Virtual Reality Toirt-Samhlaigh The Project Software Specification and Design Process Implementation Results Conclusion FutureWork

  5. Sand Dunes Background Background Sand Dunes Ground Penetrating Radar and Brunton Compass Volume Rendering Virtual Reality Toirt-Samhlaigh The Project Software Specification and Design Process Implementation Results Conclusion FutureWork

  6. Sand Dunes Background Background Sand Dunes Ground Penetrating Radar and Brunton Compass Volume Rendering Virtual Reality Toirt-Samhlaigh The Project Software Specification and Design Process Implementation Results Conclusion FutureWork

  7. Sand Dunes Background • Shapes • Crescentic • Linear • Star • Dome • Parabolic • Transverse • Reversing Background Sand Dunes Ground Penetrating Radar and Brunton Compass Volume Rendering Virtual Reality Toirt-Samhlaigh The Project Software Specification and Design Process Implementation Results Conclusion FutureWork

  8. Sand Dunes Background • Types • Sub-aqueous • Lithified • Coastal • Desert Background Sand Dunes Ground Penetrating Radar and Brunton Compass Volume Rendering Virtual Reality Toirt-Samhlaigh The Project Software Specification and Design Process Implementation Results Conclusion FutureWork

  9. Sand Dunes Background • Forms • Simple • Compound • Complex Background Sand Dunes Ground Penetrating Radar and Brunton Compass Volume Rendering Virtual Reality Toirt-Samhlaigh The Project Software Specification and Design Process Implementation Results Conclusion FutureWork

  10. Sand Dunes Background Background Sand Dunes Ground Penetrating Radar and Brunton Compass Volume Rendering Virtual Reality Toirt-Samhlaigh The Project Software Specification and Design Process Implementation Results Conclusion FutureWork Dune 7 in the Namib desert

  11. Ground Penetrating Radar Background Background Sand Dunes Ground Penetrating Radar and Brunton Compass Volume Rendering Virtual Reality Toirt-Samhlaigh The Project Software Specification and Design Process Implementation Results Conclusion FutureWork

  12. Ground Penetrating Radar Background Background Sand Dunes Ground Penetrating Radar and Brunton Compass Volume Rendering Virtual Reality Toirt-Samhlaigh The Project Software Specification and Design Process Implementation Results Conclusion FutureWork

  13. Ground Penetrating Radar Background Background Sand Dunes Ground Penetrating Radar and Brunton Compass Volume Rendering Virtual Reality Toirt-Samhlaigh The Project Software Specification and Design Process Implementation Results Conclusion FutureWork

  14. Brunton Compass Background Background Sand Dunes Ground Penetrating Radar and Brunton Compass Volume Rendering Virtual Reality Toirt-Samhlaigh The Project Software Specification and Design Process Implementation Results Conclusion FutureWork

  15. Brunton Compass Background Background Sand Dunes Ground Penetrating Radar and Brunton Compass Volume Rendering Virtual Reality Toirt-Samhlaigh The Project Software Specification and Design Process Implementation Results Conclusion FutureWork

  16. Brunton Compass Background Background Sand Dunes Ground Penetrating Radar and Brunton Compass Volume Rendering Virtual Reality Toirt-Samhlaigh The Project Software Specification and Design Process Implementation Results Conclusion FutureWork

  17. Volume Rendering Background • Display of data sampled in three dimensions Background Sand Dunes Ground Penetrating Radar and Brunton Compass Volume Rendering Virtual Reality Toirt-Samhlaigh The Project Software Specification and Design Process Implementation Results Conclusion FutureWork

  18. Volume Rendering Background Background Sand Dunes Ground Penetrating Radar and Brunton Compass Volume Rendering Virtual Reality Toirt-Samhlaigh The Project Software Specification and Design Process Implementation Results Conclusion FutureWork

  19. Volume Rendering Background Background Sand Dunes Ground Penetrating Radar and Brunton Compass Volume Rendering Virtual Reality Toirt-Samhlaigh The Project Software Specification and Design Process Implementation Results Conclusion FutureWork

  20. Volume Rendering Background • Methodologies • Indirect • Direct • Algorithm categories • Object-order • Image-order • Hybrid Background Sand Dunes Ground Penetrating Radar and Brunton Compass Volume Rendering Virtual Reality Toirt-Samhlaigh The Project Software Specification and Design Process Implementation Results Conclusion FutureWork

  21. Indirect Background • Iso-surfaces Background Sand Dunes Ground Penetrating Radar and Brunton Compass Volume Rendering Virtual Reality Toirt-Samhlaigh The Project Software Specification and Design Process Implementation Results Conclusion FutureWork

  22. Indirect Background • Assumptions • Iso-surfaces exist • Rendered within a reasonable degree of accuracy • Complexity is an issue Background Sand Dunes Ground Penetrating Radar and Brunton Compass Volume Rendering Virtual Reality Toirt-Samhlaigh The Project Software Specification and Design Process Implementation Results Conclusion FutureWork

  23. Direct Background • Requirement • Every sample point is mapped to an opacity and color • Techniques • Ray Casting • Splatting • Shear-Warp • Texture Mapping • Hardware Accelerated Background Sand Dunes Ground Penetrating Radar and Brunton Compass Volume Rendering Virtual Reality Toirt-Samhlaigh The Project Software Specification and Design Process Implementation Results Conclusion FutureWork

  24. Ray Casting Background • Image-order algorithm • Produces some of the highest quality images • Very computationally expensive Background Sand Dunes Ground Penetrating Radar and Brunton Compass Volume Rendering Virtual Reality Toirt-Samhlaigh The Project Software Specification and Design Process Implementation Results Conclusion FutureWork

  25. Ray Casting Background Background Sand Dunes Ground Penetrating Radar and Brunton Compass Volume Rendering Virtual Reality Toirt-Samhlaigh The Project Software Specification and Design Process Implementation Results Conclusion FutureWork

  26. Splatting Background • Object-order algorithm • Less computationally expensive than Ray Casting • Throw paint balls onto a surface to obtain an image Background Sand Dunes Ground Penetrating Radar and Brunton Compass Volume Rendering Virtual Reality Toirt-Samhlaigh The Project Software Specification and Design Process Implementation Results Conclusion FutureWork

  27. Splatting Background • Maps every voxel to the viewing plane • Footprint • Reconstruction Kernel • Speed • Precompute footprints • Issue • Reconstruction Kernel selection • Too larger results in a blurry image • Too small results in gaps in the image Background Sand Dunes Ground Penetrating Radar and Brunton Compass Volume Rendering Virtual Reality Toirt-Samhlaigh The Project Software Specification and Design Process Implementation Results Conclusion FutureWork

  28. Splatting Background Background Sand Dunes Ground Penetrating Radar and Brunton Compass Volume Rendering Virtual Reality Toirt-Samhlaigh The Project Software Specification and Design Process Implementation Results Conclusion FutureWork

  29. Shear-Warp Background • Hybrid algorithm • Fastest purely software-based algorithm Background Sand Dunes Ground Penetrating Radar and Brunton Compass Volume Rendering Virtual Reality Toirt-Samhlaigh The Project Software Specification and Design Process Implementation Results Conclusion FutureWork

  30. Shear-Warp Background • Sheared object space Background Sand Dunes Ground Penetrating Radar and Brunton Compass Volume Rendering Virtual Reality Toirt-Samhlaigh The Project Software Specification and Design Process Implementation Results Conclusion FutureWork

  31. Shear-Warp Background Background Sand Dunes Ground Penetrating Radar and Brunton Compass Volume Rendering Virtual Reality Toirt-Samhlaigh The Project Software Specification and Design Process Implementation Results Conclusion FutureWork

  32. Shear-Warp Background • Speed • Run-length encoding • Issues • Run-length encoding • One for each axis, 3 x memory consumption • Interpolation is per slice • Aliasing • Staircasing Background Sand Dunes Ground Penetrating Radar and Brunton Compass Volume Rendering Virtual Reality Toirt-Samhlaigh The Project Software Specification and Design Process Implementation Results Conclusion FutureWork

  33. Texture Mapping Background • Uses Graphics Hardware • Texture Mapping • Interpolation • Types • 2D-texture mapping • 3D-texture mapping Background Sand Dunes Ground Penetrating Radar and Brunton Compass Volume Rendering Virtual Reality Toirt-Samhlaigh The Project Software Specification and Design Process Implementation Results Conclusion FutureWork

  34. 2D-Texture Mapping Background • Splits data into axis-aligned slices • Composited in back-to-front order Background Sand Dunes Ground Penetrating Radar and Brunton Compass Volume Rendering Virtual Reality Toirt-Samhlaigh The Project Software Specification and Design Process Implementation Results Conclusion FutureWork

  35. 2D-Texture Mapping Background • Advantages • Simplicity • Takes advantage of graphics hardware (Bilinear interpolation) • Disadvantages • Slices created for each axis, 3 x memory consumption • Flickering • Aliasing occurs when magnified Background Sand Dunes Ground Penetrating Radar and Brunton Compass Volume Rendering Virtual Reality Toirt-Samhlaigh The Project Software Specification and Design Process Implementation Results Conclusion FutureWork

  36. 3D-Texture Mapping Background • Stores data as a 3D-texture • Creates viewport aligned slices Background Sand Dunes Ground Penetrating Radar and Brunton Compass Volume Rendering Virtual Reality Toirt-Samhlaigh The Project Software Specification and Design Process Implementation Results Conclusion FutureWork

  37. 3D-Texture Mapping Background • Advantages • Overcomes disadvantages of 2D-texture mapping • Takes advantage of graphics hardware (Trilinear interpolation) Background Sand Dunes Ground Penetrating Radar and Brunton Compass Volume Rendering Virtual Reality Toirt-Samhlaigh The Project Software Specification and Design Process Implementation Results Conclusion FutureWork

  38. 3D-Texture Mapping Background • Disadvantages • Bricking mechanism required for large data sets • Limited by bandwidth between system memory and graphics hardware • Brick size • Too large wont fit into graphics hardware’s memory cache • Too small increases memory footprint and number of intersection tests Background Sand Dunes Ground Penetrating Radar and Brunton Compass Volume Rendering Virtual Reality Toirt-Samhlaigh The Project Software Specification and Design Process Implementation Results Conclusion FutureWork

  39. Hardware Accelerated Background • Uses Programmable Pipeline instead of the Fixed Functionality Pipeline Background Sand Dunes Ground Penetrating Radar and Brunton Compass Volume Rendering Virtual Reality Toirt-Samhlaigh The Project Software Specification and Design Process Implementation Results Conclusion FutureWork

  40. Virtual Reality Background • Notion of mental immersion through feedback • Visual • Haptic • Olfactory • Auditory • Depth Cues • Monoscopic • Stereoscopic • Motion Background Sand Dunes Ground Penetrating Radar and Brunton Compass Volume Rendering Virtual Reality Toirt-Samhlaigh The Project Software Specification and Design Process Implementation Results Conclusion FutureWork

  41. Virtual Reality Background • Stereo Vision • Active • Passive • Stereoscopic Displays • Fishtank • Head Mounted Display • Projection-based • Input Devices • Toolkits Background Sand Dunes Ground Penetrating Radar and Brunton Compass Volume Rendering Virtual Reality Toirt-Samhlaigh The Project Software Specification and Design Process Implementation Results Conclusion FutureWork

  42. Depth Cues Background • Monoscopic • Provide information from only one eye • Information • Interposition • Size • Linear perspective • Motion parallax Background Sand Dunes Ground Penetrating Radar and Brunton Compass Volume Rendering Virtual Reality Toirt-Samhlaigh The Project Software Specification and Design Process Implementation Results Conclusion FutureWork

  43. Depth Cues Background • Stereoscopic • Provide information from two eyes • Images are different perspectives of the same location • Provides spatial information • Obtained from the parallax between objects in the image • Motion • Same as motion parallax • Not always present Background Sand Dunes Ground Penetrating Radar and Brunton Compass Volume Rendering Virtual Reality Toirt-Samhlaigh The Project Software Specification and Design Process Implementation Results Conclusion FutureWork

  44. Stereo Vision Background • Active • 1 Projector with 120Hz refresh rate (60Hz each eye) • Synchronized signals between projector and glasses Background Sand Dunes Ground Penetrating Radar and Brunton Compass Volume Rendering Virtual Reality Toirt-Samhlaigh The Project Software Specification and Design Process Implementation Results Conclusion FutureWork

  45. Stereo Vision Background • Passive • 2 Projectors (60Hz refresh rate) • Polarized filters Background Sand Dunes Ground Penetrating Radar and Brunton Compass Volume Rendering Virtual Reality Toirt-Samhlaigh The Project Software Specification and Design Process Implementation Results Conclusion FutureWork

  46. Stereoscopic Displays Background • Types • Fishtank • Head Mounted Display • Projection-based Background Sand Dunes Ground Penetrating Radar and Brunton Compass Volume Rendering Virtual Reality Toirt-Samhlaigh The Project Software Specification and Design Process Implementation Results Conclusion FutureWork

  47. Stereoscopic Displays Background Background Sand Dunes Ground Penetrating Radar and Brunton Compass Volume Rendering Virtual Reality Toirt-Samhlaigh The Project Software Specification and Design Process Implementation Results Conclusion FutureWork

  48. Stereoscopic Displays Background Background Sand Dunes Ground Penetrating Radar and Brunton Compass Volume Rendering Virtual Reality Toirt-Samhlaigh The Project Software Specification and Design Process Implementation Results Conclusion FutureWork

  49. Stereoscopic Displays Background Background Sand Dunes Ground Penetrating Radar and Brunton Compass Volume Rendering Virtual Reality Toirt-Samhlaigh The Project Software Specification and Design Process Implementation Results Conclusion FutureWork

  50. Input Devices Background Background Sand Dunes Ground Penetrating Radar and Brunton Compass Volume Rendering Virtual Reality Toirt-Samhlaigh The Project Software Specification and Design Process Implementation Results Conclusion FutureWork

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