page_title: Volumetric video
section_title: Light fields
hierarchical_section_title: Volumetric video / History / Light fields
caption_attribution_description: English: Lytro Illum 2nd generation light field camera.
context_page_description: Volumetric video is a technique that captures a three-dimensional space, such as a location or performance. This type of volumography acquires data that can be viewed on flat screens as well as using 3D displays and VR goggles. Consumer-facing formats are numerous and the required motion capture techniques lean on computer graphics, photogrammetry, and other computation-based methods. The viewer generally experiences the result in a real-time engine and has direct input in exploring the generated volume.
context_section_description: Light fields describe at a given sample point the incoming light from all directions. This is then used in post processing to generate effects such as depth of field as well as allowing the user to move their head slightly. Since 2006 Lytro is creating consumer-facing cameras to allow the capture of light fields. Fields can be captured inside-out in camera or outside-in from renderings of 3D geometry, representing a huge amount of information ready to be manipulated. Currently data rates are still a large issue and the technique has a large potential for the future as it samples light and displays the result in a variety of ways.
  Another by-product of this technique is a reasonably accurate depth map of the scene. Meaning each pixel has information about its distance from the camera. Facebook is using this idea in its Surround360 camera family to capture 360° video footage that is getting stitched with the help of distance maps. Extracting this raw data is possible and allows a high-resolution capture of any stage. Again the data rates combined with the fidelity of the depth maps are huge bottlenecks but soon to be overcome with more advanced depth estimation techniques, compression, as well as parametric light fields.
caption: Lytro Illum Camera, a second generation Light Field camera.
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