ABOUT RESEARCH PUBLICATIONS PERSONAL CV

Todor Georgiev

Sr. Research Scientist, Photoshop Group, Adobe Systems
tgeorgie at adobe dot com

Lippmann: Epreuves Reversibles. Translation: Reversible Prints. Thanks to Fredo Durand, Shmuel Peleg, Nicolas Merlet and Sylvain Paris.

Publications on "Light Fields" and Fly's eye lenses

Light Field HDR project
Georgiev, T., Lumsdaine, A., Goma, S., High Dynamic Range Image Capture with Plenoptic 2.0 Camera, Signal Recovery and Synthesis (SRS), Fall OSA Optics & Photonics Congress, 2009. We demonstrate HDR imaging with Plenoptic 2.0 camera.

Georgiev, T., Lumsdaine, A., Resolution in Plenoptic Cameras, COSI, October 2009. We demonstrate mathematically why the resolution of the Plenoptic 2.0 camera is higher than the resolution of the Plenoptic camera.

Georgiev, T., Lumsdaine, A., Superresolution with Plenoptic 2.0 Cameras, SRS, October 2009. We demonstrate superresolution with Plenoptic 2.0 camera -- without depth or correspondence estimation from images.

Bird on the antenna: Before and after superresolution

Georgiev, T., Lumsdaine, A., Superresolution with Plenoptic Camera 2.0, Adobe Tech Report, April 2009. We demonstrate a very simple method that achieves superresolution of light field data from Plenoptic 2.0 camera. Bird image before/after. Originally submitted to EGSR 2009.

Lumsdaine, A., Georgiev, T., The Focused Plenoptic Camera, ICCP, April 2009. Uncompressed version of the paper with high resolution images. Detailed analysis of the Plenoptic 2.0 Camera. Radiance / lightfield data directly from our camera (Galilean telescopic array), and refocusing. Two movies created from our Keplerian camera data: refocusing, and changing the viewpoint.

Georgiev, T., Lumsdaine, A., Depth of Field in Plenoptic Cameras, Eurographics 2009. As can be seen from this comparison image, "plenoptic depth of field" is very different from depth of field in a conventional camera. We derive some simple but unusual formulas. Feel free to use this radiance / lightfield data, directly from our camera (Keplerian telescopic array).

Georgiev, T., Intwala, C., Babacan, S., Lumsdaine, A., Unified Frequency Domain Analysis of Lightfield Cameras, ECCV 2008. Lightfield data and Videos.

Story, D., Whitmire, E., Georgiev, T., The Future of Photography (in Japanese), Optics / Electronics, Oct 2008. The Future of Photography (English draft).

Intwala, C., Georgiev, T., "Removing Artifacts Due to Frequency-Domain Processing of Lightfields", Eurographics, April 2008.

Lumsdaine, A., Georgiev, T., Full Resolution Lightfield Rendering, Adobe Tech Report, January 2008. We show that 500 times increase in the resolution of the plenoptic camera is possible! Originally submitted to SIGGRAPH 2008.
Related CVPR presentation on Plenoptic Camera 2.0 (Focused Plenoptic Camera). Diagram of the camera.
Data: Lightfields freely available for experimentation: A crop (72 MB) and full data (1.5 GB). This may be the largest lightfield ever captured with a single camera.
Demos: Comparison with Lightfield Rendering (Plenoptic vs. Plenoptic 2.0 rendering). A video shows incredible detail!

Adobe Tech Report, April 2007 Lightfield Capture by Frequency Multiplexing. Careful theoretical derivation of what MERL authors call "Dappled Photography" and "Heterodyning". Proving that frequency multiplexing works for both mask-based and microlens-based cameras. This is a new result. It shows that the approach is truly universal: It's not a special "heterodyning" type of camera, but a "heterodyning" method of processing the data, applicable to any camera! Also, proposing a new "mosquito net" camera. And much more (wave artifact removal, F/number analysis). Examples.
Georgiev, T., Zheng, C., Nayar, S., Curless, B., Salesin, D., Intwala, C., Spatio-angular Resolution Trade-offs in Integral Photography, EGSR 2006. My presentation slides and Videos. Brian's presentation slides.
Georgiev, T., Light Field Camera Demo, ECCV 2006.
Georgiev, T., Intwala, C.,Tech Report on Integral View Photography Adobe, February 2006.
Georgiev, T., “Compound Eye Camera”, Tech Report, October 2004.
Georgiev, T., Nikolov, P., “ Light Field Geometry”, Theoretical paper with Petko, April 2004