Three dimensional scanning technique using color structured light patterns based on phase moving coding strategy

Referring to the problem of obtaining adequate 3D information from the objects whose surface features are inconspicuous based on stereo vision in the 3D measurement,a new way to design structured light patterns using phase move strategy formed by permutation of four colors which have the coding property of window uniqueness characteristic is presented,combining with the grating structured light in the active vision measurement.The phase moving strategy can increase the density of the grating greatly.Then with the epipolar constraint,the correspondences in the grabbed image are identified and finally the shape of objects can be recovered.The experimental results show that the 3D surface obtained by the scanning technique accords well with the characteristic of the protoplast,and it specially adapts to 3D profile measurement in density.