A one-step reconstruction method of 3D surface shape based on color fringe projection

Abstract

The invention relates to a three-dimensional facial pattern one-step reconstruction method based on color fringe projection. Color sine fringe images are generated by a computer and transmitted to a projector to be projected to a measured object surface, and an industrial color camera mutually forming a certain angle with the projector acquires measured object images with the fringe images; a phase image is solved for the acquired measured object images by means of a phase shift method; foreground segmentation is conducted to obtain partial background information, function fitting is conductedon the partial background information, and a complete background phase image is recovered; and finally depth information is mapped through a phase difference between a foreground and a background. Compared with a traditional phase shift method, the method has the advantages that a plurality of background images do not need to be acquired independently, reconstruction is completed in one step by means of function fitting, the step of independently acquiring the background images is directly omitted while the number of the acquired measured object images is decreased, and flexible and quick three-dimensional facial pattern reconstruction is achieved.

Description

technical field [0001] The invention belongs to optical detection technology, relates to the technical field of non-contact three-dimensional surface reconstruction and measurement, in particular to a one-step three-dimensional surface reconstruction method based on color fringe projection. Background technique [0002] The development of stereo vision is becoming more and more popular, and the reconstruction of the three-dimensional appearance of objects is widely used, such as three-dimensional face recognition, three-dimensional dimension measurement of workpieces, observation of three-dimensional surface shapes in medical images, etc. [0003] Currently, 3D reconstruction techniques are mainly divided into two types: passive and active. [0004] Among them, passive 3D reconstruction is binocular vision technology, which uses the simulated human eyes to perceive the depth of objects. This solution is not ideal for the reconstruction of objects lacking texture on the surfa...

AI Technical Summary

Problems solved by technology

Among them, the sinusoidal fringe structured light method can achieve relatively high reconstruction accuracy by using the phase and height mapping method, but its disadvantage is that the phase shift method needs to take at least 6 images, and the background and foreground must be taken separately in two steps. This operation Greatly affects the efficiency of refactoring

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