Digitally refocusable photographs: light field photography with a hand-held plenoptic camera

Plenoptic Camera Sample

Ren Ng, a Ph.D student in the Computer Science department at Stanford says, “For my dissertation I’ve been working on ways of capturing more information about the light inside a camera for enhanced digital photography. My work has spanned both practical and theoretical elements of the problem. On the practical side, we’ve written a paper about a camera that samples the full 4D light field inside the camera in a single photographic exposure. We show that you can use such data to refocus the acquired photograph at different depths after the exposure. The images above, which are focused at different depths, were computed from a single exposure of a prototype camera that we built. We’ve used the prototype to shoot hundreds of light fields. My collaborators on this project were Mathieu Brédif, Gene Duval, and Professors Marc Levoy, Mark Horowitz and Pat Hanrahan.”

Read their paper and see more sample images at the project home page. Don’t miss his paper on Fourier Slice Photography, either!

Inverse head panorama

Inverse head pano example

“We’re trying to make high quality texture maps for game models. Using an FX-1 psuedo HD Sony camera, (its 1440 pixels, which is Sony’s anamorphic short-hand for a 1920 16:9 image,) placed sideways, I filmed Yoshi as he rotated on a turntable in front of the camera. The bank-robber cap was his idea. This resulted in about 1200 frames of a 360 degree pass around the head.”

Read more at panocamera.com

Quasi-update: Zeiss lenses in new SLR mounts? Lookin’ like Nikon!

Zeiss promised “More” today about the “Millions of SLR Photographers Will Soon Discover a New Dimension in Photography” hint on their Camera/Cine Lenses page (see previous post). Teases that they are, all they’ve done is say “Carl Zeiss Presents ZF!” and cover the previous message with a “Top Secret” folder. Which is to say that they’ve told us a lot: it’s likely a line of Zeiss lenses with Nikon F mounts. Yay for Nikon shooters!

More info is promised for Wednesday, 28 December 2005.

Zeiss lenses in new SLR mounts?

The main Zeiss Camera/Cine Lenses page has an image that says “Millions of SLR Photographers Will Soon Discover a New Dimension in Photography”. Innnnteresting!

Is the excellent Zeiss 45mm for Contax G too much to hope for in an EF mount with FTM (Full-Time Manual focus)? (Both of Canon’s 50mm offerings exhibit severe barrel distortion are are useless for me in full frame.) While they’re at it, adapt the Contax G 28mm Biogon for use as a normal lens on APS-C digital sensors.

The Zeiss page says that more info will be available tomorrow, 21 December 2005.

The world’s first single photon machine

Roland Piquepaille at ZDNet’s Emerging Technology Blog writes, “Nanotechnologists at the University of Southern California (USC) are building a device dubbed the Einstein Emitter which will deliver a single photon produced by a single electron. At the same time, other researchers at the University of Texas/Austin are developing the detector for this single photon. Together, they are assembling the first real-world photon computer system. These photon machines will first be used in cryptographic devices. But later, these photonic systems might lead to smaller and faster general purpose computers…”

While this doesn’t appear to have any immediate applications for conventional photography, I’m really curious as to what, if any, there could be.

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