Abstract:
In fringe projection profilometry, highlighting usually results in saturation of captured fringes and decreases measurement accuracy. In order to solve this problem, a new adaptive fringe projection method is proposed. The solid geometric phase solution method provided by binocular camera was used to reduce the number of fringe projections and improve the efficiency of adaptive projection. The intersection ratio invariant constraint is adopted to improve the corresponding accuracy between projector and camera. Compared with the traditional monocular FPP reconstruction results, the standard deviation of the fitting plane is reduced by 0.049 mm, and the flatness is increased by 84.5%. The distance between the front and rear surfaces is 8.829 mm, and the error with the standard value is 0.045 mm, which increases by 42.3%. The proposed method realizes the complete extraction of phase information in the local overexposure area, and effectively solves the problem of 3D shape measurement of highly reflective objects. Compared with the traditional FPP method, the reconstruction result is obviously improved, which shows the effectiveness of the improved algorithm in this paper.