S Zhang and S-T Yau, "High-speed three-dimensional shape measurement system using a modified two-plus-one phase-shifting algorithm," Opt. Eng., 46(11), 113603, 2007; doi:10.1117/1.2802546
This paper describes a high-resolution, real-time, threedimensional shape measurement system using the modified two-plusone phase-shifting algorithm. The data acquisition speed is as high as 60 frames/ s with an image resolution of 640480 pixels per frame. Experiments demonstrated that the system was able to acquire the dynamic changing objects such as facial geometric shape changes when the subject is speaking, and the modified two-plus-one phase-shifting algorithm can further alleviate the error due to motion. Applications of this system include manufacturing, online inspection, medical imaging, compute vision, and computer graphics.