The Incredible Machines Bringing XR Stages to Life
Here are three common issues.
Seams. Remember how the LED wall is made up of multiple segments, and how all the computers have to work together to project a single scene onto them?
“Each of those segments has a different geometry, because the wall is typically curved,” Tankersley said. “So the computers also have to understand the specific curve of the wall and where the segments meet.” If the software picks up any errors in the geometry, “you’ll see some weird artifacts on the wall.” Artifacts include a range of undesirable visual elements.
Syncing. “All of the screens have to be synced to the [camera] frame so that the camera and the wall are in sync for every frame, so you don’t get any flicker,” Tankersley said. “If the sensor on the camera is running on a slightly different clock to the wall, you’ll see artifacts.” How precisely do all the sensors and clocks have to be synced? “To the microsecond.”
Camera angles and proximity. “LEDs have a color shift on different angles…you see this with any TV,” Tankersley said. “If you look at it straight on, the colors are right, and if you look at an angle, they’re off. So you have to pay attention to the angle of the camera to the wall.”
See the full story here: https://hitsonline.org/2021/10/28/the-incredible-machines-bringing-xr-stages-to-life
