Abstract: A system includes an additive manufacturing machine having a reference surface and an object surface, at least one camera device to capture the reference surface, at least one projector device to project at the reference surface, a memory storing computer-readable instructions, and at least one processor to execute the instructions to move the reference surface above or below a highest point the object surface, and move the reference surface downward and obtain a digital fringe projection phasemap of the reference surface using the at least one camera device and the at least one projector device until a whole measurement volume has phasemap data.