3D Volumetric Display Using Passive Optical Scatterers

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					3D Volumetric Display Using
 Passive Optical Scatterers

   Shree K. Nayar and Vijay Anand


         Computer Science
        Columbia University




        SIGGRAPH Conference
           July 2006, Boston
Volumetric Displays




   Varifocal Mirrors
   Spinning Screens
   Flourescent Gases
   Active Scatterers
   Passive Scatterers…
   Related Work: Static Volumetric Displays
Voxels with Invisible Waveguides
                                    Detection/Illumination of Dust




         MacFarlane 1998
Multi-Plane Projection: DepthCube




                                              Perlin 2004
          Sullivan 2003
         Two Dimensional Display




Orthographic Projector
Three Dimensional Display: Semi-Regular Cloud

  Semi-Regular Indexable Cloud




                                                                  (9 x 9 x 9)

                                                             Visibility Function




                                 Number of Visible Points



   Orthographic Projector

                                                            Viewing Angle (Degrees)
Three Dimensional Display: Z-Dithered Cloud

  Z-Dithered Indexable Cloud




                                                                (9 x 9 x 9)

                                                           Visibility Function




                               Number of Visible Points



  Orthographic Projector

                                                          Viewing Angle (Degrees)
Three Dimensional Display: XY-Dithered Cloud

  XY-Dithered Indexable Cloud




                                                                 (9 x 9 x 9)

                                                            Visibility Function




                                Number of Visible Points



   Orthographic Projector

                                                           Viewing Angle (Degrees)
Three Dimensional Display: XYZ-Dithered Cloud

  XYZ-Dithered Indexable Cloud




                                                                   (9 x 9 x 9)

                                                             Visibility Function




                                 Number of Visible Points



    Orthographic Projector

                                                            Viewing Angle (Degrees)
                                 Visibility as a Function of Depth

                                          Different Points Within Same XY Grid
175
Viewing Angle (degrees)




     5
                          1 2   3 4 5   6 7   8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25

                                         Depth (Z – Color Coded) of XY Grid
Points Clouds using Laser Induced Damage (LID)




  70 mm

                                     200 mm



                 200 mm


                                 Points: 48 x 48 x 25
                                   Point Brightness

                   1600


                   1400                                   Point with 1 Crack
                                                          Point with 4 Cracks
                   1200
                                                          Point with 6 Cracks
Point Brightness




                   1000                                   Point with 10 Cracks

                    800


                    600

                    400


                    200

                      0
                          0   10      20       30    40     50       60    70    80
                                           Viewing Angle (degrees)
         Point Color


   Color Response of LID Layer




Color Response of Optical Diffuser
Display Implementation


                         Glass Cube




                         Fresnel Lens

                         Planar Mirror




                         Projector
      Display of True 3D Objects




Point Cloud: 25x25x16 = 10,000 XYZ-Dithered Points
3D Animation: Rolling Ball
3D Animation: Rolling Ball
Display of Extruded Objects with Top Planes




            Cloud: 190,500 Points
Extruded Objects With Lids
Extruded Objects With Lids
Display of Purely Extruded Objects




        Cloud: 180,500 Points
Purely Extruded Objects
“Pacman” in 3D




         Cloud: 83,866 Points
“Pacman” in 3D
                  3D Avatar




             Cloud: 127,223 Points

Relief Projection: Walt Disney Co. 1980, Negroponte 1981
3D Avatar
3D Avatar
                         Summary
• Volumetric Displays using Passive Light Scatterers

• Enhanced Point Visibility by Randomization

• Low Cost Implementation using Laser Induced Damage

• Applications:




     3D and Extruded Objects               Games       Avatars

				
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posted:11/29/2011
language:English
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