Greg Welch (University of North Carolina),
Marc Pollefeys (University of North Carolina)
UK Office of Research, National Science Foundation
Structured light illumination (SLI) is the process of projecting a series of light striped patterns onto an object. A digital camera then records the deformation in the pattern to reconstruct a 3-D model of the object’s surface. Using only a single camera and illumination source with a single processing computer, the system can easily be constructed from readily available parts.
In the past, SLI has not typically been used with video applications because of the very high frame rate needed. Based on the complexity of the calculations, video-based SLI systems have been required to record camera frames to memory and then apply off-line processing in order to reconstruct 3-D video.
This project has devised a lookup-table based solution that can generate real-time acquisition and display of 3-D scans. The system can acquire and display 3-D video in real time. The potential uses for this technology include facial recognition applications, biometrics, and hand gesture recognition.