This paper describes an easy-to-implement three-dimensional
(3-D) real-time shape measurement technique using our newly developed
high-speed 3-D vision system. It employs only four projection fringes to
realize full-field phase unwrapping in the presence of discontinuous or
isolated objects. With our self-designed pattern generation hardware and a
modified low-cost DLP projector, the four designed patterns can be generated
and projected at a switching speed of 360 Hz. Using a properly synchronized
high-speed camera, the high-speed fringe patterns distorted by measured objects
can be acquired and processed in real-time. The resulting system can capture
and display high-quality textured 3-D data at a speed of 120 frames per second,
with the resolution of 640 × 480 points.