09
Sep

Shot with 26,000 Feet Interaxial 3D Rig

on Monday, 09 September 2013 12:55. Posted in Research Projects

Ryuko Kataoka from the National Institute of Polar Research (Tokyo, Japan) is using a stereoscopic pair of Nikon DSLR cameras to determine the altitute of northern lights in the scope of the Aurora research project. The unusual setup requires a very large interaxial distance between both cameras: 8 km (26,200 feet). Ryuho Kataoka got the idea for this innovative method to measure the height of sky features such as northern lights after working on a 3D movie for a planetarium.

Aurora Borealis

Since aurora borealis extend between 90 and 400 km in altitude, a very large interaxial distance is needed to see them in 3D, so Mr. Kataoka used two SDSLR cameras with fisheye lenses and GPS locators,separated by 8 km across the Chatanika area in Alaska. Simultaneous capture was ensuring through remote control and GPS clock. Triangulation methods were then used to compute the distance to the various objects in the picture. The altitude maps obtained by stereoscopic photography proved to be consistent with previous observations done by other methods.

kataoka 3D aurora borealis imagingAll-sky images of aurora borealis obtained from (left) Poker Flat and from (right) Aurora Borealis Lodge on March 17, 2013. Camera settings are ISO6400 and 2 s exposure time. The center of images is the zenith, geographic north is to the top, and west is to the right.

30
Aug

Third Report on Stereoscopic Film Quality Released

on Friday, 30 August 2013 12:44. Posted in Research Projects

Researcher Denis Sumin and his supervisor Pr. Dmitriy Vatolin from Lomonosov Moscow State University in Russia are leading a project on 3D stereoscopic movie quality assessment called VQMT3D (Video Quality Measurement Tool 3D).

The Lab decided to analyze several stereoscopic films and to investigate the potential reasons of headache and eyestrain often suffered by some moviegoers. The first two reports were focused on films captured with stereoscopic camera systems, and the main problems discovered during the film analysis were: excessive horizontal disparity, vertical disparity, color mismatch, and sharpness mismatch.

Report #3 of 6 has just been released in August 2013 (free access to all 3D professionals -see links here under). Report #3 analyses in great details -literally image by image and pixel by pixel- specific 2D-to-3D conversion metrics such as edge sharpness mismatch and cardboard effect for the following movies: Alice in Wonderland, Clash of the Titans, Conan the Barbarian, Green Lantern, and Abraham Lincoln: Vampire Hunter.

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30
Jul

No-glasses 3D Tangible Interface Demonstrated

on Tuesday, 30 July 2013 16:09. Posted in Research Projects

Researchers Takumi Kusano, Takehiro Niikura, and Takashi Komuro from the Komuro Laboratory (Saitama University, Japan) propose a virtually tangible 3D interaction system that enables direct interaction with 3D virtual objects which are presented on an autostereoscopic (glasses-free stereoscopic) display. Watch the demo here under.

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06
Aug

3D Shooting Through a Single Lens

on Tuesday, 06 August 2013 11:08. Posted in Research Projects

Professor Kenneth Crozier and graduate student Anthony Orth, both at the Harvard School of Engineering and Applied Sciences (Cambridge, MA, USA) have developed a way for photographers and microscopists to create a stereoscopic 3D image through a single lens, without moving the camera.

This improbable-sounding technology relies only taking two pictures with different focus and handling them to a sophisticated algorithm. The method requires a reasonably large lens (i.e. a DSLR camera, not a smartphone one). Details and a short but impressive video demo here under.

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16
Jul

Watch 3D (with Glasses) and 2D (without glasses) at the Same Time

on Tuesday, 16 July 2013 15:18. Posted in Research Projects

Researchers at the University of California Santa Cruz have developed a 3D display which can also be viewed in 2D without glasses, and without the blurred effect caused by overlapping images. Though, as you'd expect, the screen displays both left and right images, it also emits a mysterious third image which is the key to the technology.

How It Works

The projector displays alternatively three images every 1/120th of a second: left eye, right eye, and inverted right eye. Seen without any glasses, only the left image is perceived as the inverted right image cancels the "normal" right one.

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With the active stereoscopic 3D glasses however, only the left and right images are passing through and reach the eyes, allowing the viewer to perceive a normal stereoscopic image.

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