A novel phase fusion algorithm of restraining saturation error in phase measuring profilometry

In phase measuring profilometry(PMP), the intensity values exceed the maximum quantization range of camera because of the larger surface reflectivity of object, that is intensity saturation. This paper analyzes phase error caused by intensity saturation, and proposes a phase fusion algorithm. Using this algorithm, we find the largest normalized modulation intensity of each pixel, and extract the corresponding phase and fuse them. The proposed method can effectively restrain the saturation error in the ideal situation and in the situation where exists gamma distortion in the camera-projector pair. The corrected phase error decrease 558.86% in experiment.