Archive for September, 2009

ALEX ROMAN / THE THIRD & THE SEVENTH

September 25, 2009

Some philosophies of aesthetics enumerate seven primary art forms derived from Georg Wilhelm Friedrich Hegel’s “Lectures on the Aesthetics” and the writings of film theorist Ricciotto Canudo: architecture, sculpture, painting, dance, music, poetry, and cinema.

The order is disputed, and architecture is sometimes shuffled to the third position, as it was by aspiring filmmaker Alex Roman for the title of his breathtaking work in progress, TheThird&TheSeventh, an artful combination of photorealistic architectural renderings and stylish CG cinematography.

In Roman’s able hands, the combination is undeniably poetic. His reverence for light borders on transcendent, and his attention to detail is inspiring.

http://motionographer.com/2009/08/16/alex-roman-thethirdtheseventh/#more-18363

11_forestrefuge4_v2

alexromanexeter

http://www.thirdseventh.com

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PAUL DEBEVEC

September 15, 2009

Paul Debevec is a researcher in computer graphics at the University of Southern California’s Institute for Creative Technologies. He is best known for his pioneering work in high dynamic range imaging and image-based modelling and rendering and has been a key speaker at the SIGGRAPH conventions since the late 90’s.

His work focuses mainly on simulations of spatially varying lighting techniques creating real world lighting apparatus that illuminate a person. The scene illumination data is generated to specify the illumination at the location in the scene from a plurality of spatial directions. The subject is then illuminated with the illumination at the location in the scene by driving a plurality of light sources surrounding the subject with the scene illumination data.

A two-meter sphere Lighting Stage of inward-pointing RGB light emitting diodes focused on the actor, where each light can be set to an arbitrary color and intensity to replicate a real-world or virtual lighting environment.
syntheticlighting2

‘We describe a process for compositing a live performance of an actor into a virtual set wherein the actor is consistently illuminated by the virtual environment. The Light Stage used in this work is a two-meter sphere of inward-pointing RGB light emitting diodes focused on the actor, where each light can be set to an arbitrary color and intensity to replicate a real-world or virtual lighting environment. We implement a digital two-camera infrared matting system to composite the actor into the background plate of the environment without affecting the visible-spectrum illumination on the actor. The color reponse of the system is calibrated to produce correct color renditions of the actor as illuminated by the environment. We demonstrate moving-camera composites of actors into real-world environments and virtual sets such that the actor is properly illuminated by the environment into which they are composited.’ – Debevec, http://gl.ict.usc.edu/Research/LS3/

Light Stage
syntheticlighting

This Light Stage is designed to move a small spotlight around a person’s head (or a small collection of objects) so that it is illuminated from all possible directions in a small period of time. From this data, we can then simulate the object’s appearance under any complex lighting condition. A set of stationary digital video cameras record the person or objects’ appearance as the light moves around, and for some of our models we precede the lighting run with a geometry capture process using structured light from a video projector.

A 1-minute-exposure photograph of a reflectance field capture session; the path of the spotlight is traced out as a spiraling luminous streak.
lightstage0011

http://www.debevec.org/