Efficient phase-3D mapping method and system based on fringe projection profilometry

Abstract

The invention is suitable for the technical field of optical three-dimensional digital imaging and provides a fringe projection profilometry-based efficient phase position-three-dimensional mapping method. The fringe projection profilometry is on the basis of a binocular system, and the binocular system comprises a projection device and an imaging device. The method comprises the following steps: S1, protecting fringe sequence to the surface of a to-be-detected object by the projection device, acquiring a deformed fringe graph modulated by the to-be-detected object by the imaging device, and calculating according to the deformed fringe graph to obtain the phase positions of all the pixel points on the image of the imaging device; and S2, finding out a phase position-three-dimensional mapping coefficient corresponding to each pixel point from a preset phase position-three-dimensional mapping coefficient lookup table and substituting the phase position of each pixel point and the corresponding phase position-three-dimensional mapping coefficient into a phase position-three-dimensional mapping function so as to calculate the three-dimensional coordinates of an object point corresponding to each pixel point on the image of the imaging device. By the method provided by the invention, efficient three-dimensional reconstruction of fringe projection profilometry can be realized.

Description

technical field [0001] The invention belongs to the technical field of optical three-dimensional digital imaging, in particular to an efficient phase-three-dimensional mapping method and system based on fringe projection profilometry. Background technique [0002] Fringe projection profilometry is a non-contact, full-field optical three-dimensional digital imaging and measurement method; it is based on a binocular system, which usually includes a camera and a projector, where the projector projects a set of sinusoidal The fringe sequence reaches the surface of the measured object, and the camera collects the deformed fringe pattern modulated by the surface of the object; the modulation phase of the deformed fringe pattern is obtained through the fringe analysis technology, and the three-dimensional shape of the measured object is recovered from the modulated phase through the scene reconstruction method. [0003] There are two typical 3D reconstruction methods based on fring...

AI Technical Summary

Problems solved by technology

However, during the reconstruction process, the stereo vision method requires a series of coordinate transformations, especially searching for corresponding points between the camera and the projector, which greatly increases the computational complexity and time cost, and significantly reduces the efficiency of 3D reconstruction.

Images