HIGH SPEED 3-D MEASUREMENT SYSTEM USING INCOHERENT LIGHT SOURCE FOR HUMAN PERFORMANCE ANALYSIS

Abstract

This paper presents a newly developed high speed 3-D measurement system, which enable us to obtain continuously range image of 768x480 spatial resolution at video rate. It is based on a light pattern projection method and uses incoherent light source instead of laser beam. So it is not dangerous to environment. To obtain one range image, it needs to project only two types of light patterns. Each light pattern has different intensity profile toward specific direction. Then, the target space is encoded to many thin slit-like regions by the intensity ratio of those two light patterns. So, taking video images corresponding to each light pattern, we can determine the slit-like region corresponding to each pixel by the density ratio of it in those two video images. As a result, we can obtain a range image by using triangulation. Trial system has ensured the performance shown in the beginning. 1