Usc/ict

摘要

Studios have turned to LJSC's Institute for Creative Technologies (ICT) for years to capture static expression scans in the LightStage system, which surrounds an actor's face with light. "For the static scans, we ask an actor to hold an expression for two seconds while we turn on different patterns of light and take 16 photos of the face," explains Paul Debevec, associate director for graphics research at USC ICT and research professor at USC. "We have flat, even illumination, and then gradients with the bright light at the top, at the bottom, moving from left to right, and right to left. We also have two polarization states from vertical to horizontal."