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Po-Hsiang Chen Advisor: Sheng-Jyh Wang. People  Shree K. Nayar  Ramesh Raskar  Ren Ng 2.

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Presentation on theme: "Po-Hsiang Chen Advisor: Sheng-Jyh Wang. People  Shree K. Nayar  Ramesh Raskar  Ren Ng 2."— Presentation transcript:

1 Po-Hsiang Chen Advisor: Sheng-Jyh Wang

2 People  Shree K. Nayar  Ramesh Raskar  Ren Ng 2

3 Light Field 3 Levoy, M. (2006). "Light fields and computational imaging." Computer 39(8): 46-55. 5D representation4D representation

4 Computational Photography  Extend the capabilities of digital photography 4

5 App: Light Field Rendering 5

6 App: Synthetic Aperture Photography 6

7 7

8 App: Wave-front Coding 8 Object Lens CCD Wave-front Coding Optical Element 曾禎宇,” [090204]Wavefront_coding,” Vision Lab, NCTU Levin, A., R. Fergus, et al. (2007). "Image and depth from a conventional camera with a coded aperture." ACM Transactions on Graphics (TOG) 26(3): 70-es.

9 9

10 What we are interesting in … 10

11 App: Dual Photography 11 standard photograph from camera dual photograph from projector Sen, P., B. Chen, et al. (2005). "Dual photography." ACM Transactions on Graphics (TOG) 24(3): 745-755.

12 Helmholtz reciprocity 12 scene projector photosensor primal

13 Helmholtz reciprocity 13 projector photosensor projector photosensor scene light camera dual

14 14

15 15 C’ shrinks to 1x1 scalar T shrinks to 1xpq vector Result Dual photo Scanning through the projector

16 Flying spot scanner 16 http://en.wikipedia.org/wiki/Mechanical_television#Flying_spot_scanners

17 Adaptive Multiplexed Illumination 17

18 Scene relighting 18 Camera Array?

19 19

20 App: Looking Around the Corner 20 Kirmani, A., T. Hutchison, et al. (2009). “Looking around the corner using transient imaging.” ICCV2009, CVPR2011

21 21

22 Transient Light Transport  Scene S with M small planar P i  Z i defines the 3D position  D ij defines the distances between Ps 22

23 Space Time Impulse Response 23

24 Distance from STIR 24

25 Structure from Pairwise Distance  Isometric embedding 25 Dattorro, J. (2005). "Convex optimization & Euclidean distance geometry", Meboo Publishing USA.

26 Scenes with Occluders 26

27 27

28 28

29 29

30 30

31 3D displays: Stereoscopic  Disparity 31 http://en.wikipedia.org/wiki/3D_display

32 Anaglyph image 32

33 Polarized glasses 33

34 Shutter glasses 34

35 Glass-free: Parallax barrier 35

36 Glass-free: Holography 36 Schnars, U. and W. Jueptner (2005). "Digital holography", Springer.

37 37 Slinger, C., C. Cameron, et al. (2005). "Computer-generated holography as a generic display technology." Computer 38(8): 46-53.

38 App: Layered 3D 38 Wetzstein, G., D. Lanman, et al. (2011). “Layered 3D: tomographic image synthesis for attenuation-based light field and high dynamic range displays,” ACM, Siggraph 2011.

39 Tomographic Image Synthesis 39

40 40 Prototype multi-layer display

41 41 http://web.media.mit.edu/~dlanman/research/Layered3D/index.html


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