Obtain the Relative Displacement of the Fringe-centerlines in the 3-D Profilometry Measurement Using Grating Projection

It's important to accurately the relative displacament of the fringer-centerlines in the 3-D profilemetry measurement technology using the triangle method.The method of barycenter,which can obtain the sub-pixel accuracy to abstract the finge-centerlines and tracking its direction with the template technology,the relative displacement of the fringe-centerlines being relative to the reference fringe-centerlines can be obtained.