A novel high-speed 3D profilometry for complex surface measuring

Phase unwrapping is an important process in Fourier Transform Profilometry (FTP). Algorithm based on twice different precision measurements is one of the efficient solutions. But it requires at least two wrapped phase maps, which make impossible to apply in dynamic and real time 3D measurement. To overcome the obstacle, we present a novel method, in which FTP and colour fringe projections are combined to acquire two wrapped phase maps by a single snapshot of object. Thus algorithm based on twice different precision measurements can be accomplished with one exposure and dynamic 3D contouring can be implemented.