Motion-induced error reduction for high-speed dynamic digital fringe
  projection system
Sanghoon Jeon Hyo-Geon Lee Jae-Sung Lee Bo-Min Kang Byung-Wook Jeon Jun Young Yoon Jae-Sang Hyun
In phase-shifting profilometry (PSP), any motion during the acquisition of
fringe patterns can introduce errors because it assumes both the object and
measurement system are stationary. Therefore, we propose a method to pixel-wise
reduce the errors when the measurement system is in motion due to a motorized
linear stage. The proposed method introduces motion-induced error reduction
algorithm, which leverages the motor's encoder and pinhole model of the camera
and projector. 3D shape measurement is possible with only three fringe patterns
by applying geometric constraints of the digital fringe projection system. We
address the mismatch problem due to the motion-induced camera pixel disparities
and reduce phase-shift errors. These processes are easy to implement and
require low computational cost. Experimental results demonstrate that the
presented method effectively reduces the errors even in non-uniform motion.