Abstract
Phase shift method is one of the active 3D measurements. In this paper, we consider phase shift with a projector-camera system. Phase shift can reconstruct 3D points with sub pixel accuracy, that is one of main advantages for phase shift compared to the other active 3D measurements. On the other hand, this method assumes linearity between input brightness to a projector and intensity obtained by a camera. Thus measurement accuracy of phase shift depends on optical property for the projector, camera and especially a target object whose optical property is far from linearity. To solve this problem, we will propose high accuracy phase shift method for the target object with nonlinear optical property.
