3-D Reconstruction of Human Face Using the Derivative Moiré Topography

A new 3-D reconstruction algorithm for the human face is proposed using the derivative Moiré topography which ensures fast and robust reconstruction even for rough surfaces. The Moiré interference fringe pattern is initially obtained through the projection Moiré topography based on phase shifting, and then differentiated to provide a full unwrapped phase map for a human face. 2π ambiguity, which has been a chronically unsolved problem with Moiré topography, is successfully surmounted by differentiating the Moiré fringe patterns both in x- and y-directions when the object is located in the x-y plane. A real human face is used for verifying the proposed derivative Moiré topography. A human face of 4 different phase-shifted images taken in the fixed plane is almost fully reconstructed in 3-D format in 0.1 mm lateral resolution.