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Light fields and computation

al photography

Overview The light field, first described in Arun Gershun's classic 1936 paper of the same name, is defined as radiance as a function of position and direction in regions of space free of occluders. In free space, the light field is a 4D function - scalar or vector depending on the exact definition employed. Light fields were introduced into computer graphics in 1996 by Marc Levoy and Pat Hanrahan. Their proposed application was image-based-rendering - computing new views of a scene from pre-existing views without the need for scene geometry. (A workshop on image-based modeling and rendering was held at Stanford in 1998.)

The tiny Lytro is the most technologically advanced point-and-shoot ever made.

Imaging scientist Ren Ng's years of research into capturing "light fields" using increasingly high-resolution digital imaging sensors have finally come to fruition. Ng's company, Lytro, unveiled its first consumer product on Wednesday—a digital camera capable of capturing "living images" that can be infinitely refocused after capture. While the new camera is designed to change the way we capture and share snapshots, the technology has the potential to radically alter how all photographs are made.

The new Lytro camera is a small rectangular tube of aluminum, with an f/2 lens on one end and a small 2" touchscreen on the other. The only controls are a power button, shutter button, and a slider to control the 8x zoom range of its lens. There are no controls for aperture, shutter speed, or focus—because the Lytro doesn't need them. The Lytro is probably the closest thing to "point-and-shoot" photography that has ever existed in the digital era.

an incredible urban air filter, the prosolve370e skin acts as a natural light filtration system and solar gain blocker for the interior of the Hospital Manuel Gea Gonzalez, effectively saving the hospital’s energy bill for clima

te control and light.