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The Multi-Focus Plenoptic Camera

The Multi-Focus Plenoptic Camera. T. Georgiev , Adobe Systems A. Lumsdaine , Indiana University. Capturing Memorable Moments. What’s Missing with this Picture?. The Lippmann Sensor.

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The Multi-Focus Plenoptic Camera

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  1. The Multi-Focus Plenoptic Camera T. Georgiev, Adobe Systems A. Lumsdaine, Indiana University

  2. Capturing Memorable Moments

  3. What’s Missing with this Picture?

  4. The Lippmann Sensor • Can we request that Photography renders the full variety offered by the direct observation of objects? Is it possible to create a photographic print in such a manner that it represents the exterior world framed, in appearance, between the boundaries of the print, as if those boundaries were that of a window opened on reality. Gabriel Lippmann, 1908.

  5. Pixels and Cores: What do we do with that power? • Moore’s Law: Megapixels keep growing • 7.2 MP = 8 by 10 at 300dpi • Available on cell phones • 60MP sensors available now • Larger available soon (can a use be found?) • Use pixels to capture richer information about a scene • Computationally process captured data • GPU power also riding Moore’s Law curve

  6. How do we take advantage of these trends? • Plenopticcamera – High resolution; computationally intensive rendering • The pixels are samples of the radiance in the 4D ray space • Optical elements (lenses, space) transform the ray space • We take a picture by rendering (computationally) • We adjust the picture by transforming the ray space (computationally)

  7. The Full Variety: Focusing

  8. Focusing

  9. Focusing

  10. The Full Variety: Different Views

  11. Different Views

  12. Different Views

  13. Radiance (Plenoptic Function, Lightfield) • Instead of integrating rays coming from all directions into a given point (traditional camera), capture the rays individually (capture the radiance) using the Lippmann Sensor • Record all the information about the scene

  14. Plenoptic lens array outside the camera

  15. Microlenses inside the camera

  16. Problem - Solution • Problem: Limited depth of field • Solution: Microlenses of different focal lengths (This is similar to HDR where we use microlenses of different apertures)

  17. Multifocus • Lytro and Raytrixalready selling plenoptic cameras • Variable focal lengths: Better focusing. Our work on that started 2009. • Raytrix actually use microlenses of different focal lengths in their camera. • Lytro use single focal length (Plenoptic 1.0)

  18. Variable Focal Lengths Microlenses

  19. Variable Focal Lengths Microlenses

  20. Variable Focal Lengths Microlenses

  21. Variable Focal Lengths Microlenses

  22. Variable Focal Lengths Microlenses

  23. Variable Focal Lengths Microlenses: Compare Focus Quality

  24. Phase Space analysis

  25. Phase Space analysis

  26. Phase Space analysis: Miocrolenses of different focal lengths

  27. To Find Out More • This work was first presented at Asilomar2010/

  28. Live Demonstrations

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