3-D shape measurement method with max-difference color-coding structured light

A 3-D shape measurement method using max-difference color-coding structured light is suggested to avoid complicated phase-recover process in three-dimension sensing.A pattern of exclusive color sequence is obtained and a relationship between spatial location and color is established.The difference of neighboring colors is maximized so that they can be distinguished easily.Projecting the color-combination fringe to the object and reference plane respectively,two images are taken.The height of the object can be recovered by edge detection and triangulation.This method has been implemented and proved to be fast,precise and noise-immune.