Aug 09

Disney Research: A More Efficient Method for Reconstruction of Gigaray Light Fields

Today’s light field processing algorithms have mostly been tailored for relatively low image resolutions in the range of a few megapixels. That means, even with increasing sensor resolutions, light field technology will still be effectively limited by resolution. The analysis of light fields at high spatio-angular resolution, so-called “gigaray light fields“, remains a technological challenge due to the sheer computing power it requires.
Researchers at Disney Research in Zürich, Switzerland, have come up with a new, faster way of processing such light fields. Their secret: ignore some of today’s established practices in image-based reconstruction, and try something different.

Disney Research: A More Efficient Method for Reconstruction of Gigaray Light Fields (pictures: Kim et al. 2013)

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Apr 08

Gigaray LightFields: Caching Framework for Real-Time Rendering

Comparison of visual degradation due to missing light-field data (red) during rendering using four methods (picture: Birklbauer et al. 2013) In traditional digital imaging, the projected image is expressed as a set of pixels which contain two coordinates (x, y) and their respective values for colour and brightness. LightField technology enables us to record more and richer image information, also saving the direction of the lightrays. The extra data enables exciting new possibilities, but also accounts for a significant increase in file size and required computing power, which further rises with increasing resolution.

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Apr 02

A Method for Panorama LightField Imaging

Overview: Creation process of a Panorama LightField Picture (picture: Birklbauer and Bimber 2012) Not too long ago, the possibility to create LightField pictures with a mass-produced consumer camera sounded like dreams of the future. This was only the first step, though, and we’re looking forward to other popular imaging techniques (e.g. HDR and panorama imaging) to be augmented by LightField technology.
In a publication from 2012, computer scientists Clemens Birklbauer and Oliver Bimber from Johannes Kepler University in Linz, Austria presented a first approach towards creating Panorama LightField Images.

Panorama LightField Imaging: Rendered 22 Megapixel images from a LightField Panorama (picture: Birklbauer and Bimber 2012)

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