Phase-folded three-dimensional digital imaging method and device based on phase mapping

Abstract

The invention is applicable to the technical field of optical three-dimensional digital imaging, and provides a three-dimensional digital imaging method and device for a folded phase based on phase mapping. The three-dimensional digital imaging method comprises the steps of acquiring an image containing information of a measured object, and calculating a folded phase value of each pixel point on imaging planes of two imaging devices according to the image; calculating coordinates of n candidate space three-dimensional points corresponding to each pixel point via phase mapping by using the folded phase value of each pixel point on the imaging plane of the first imaging device and preset first calibration data; re-projecting the n candidate space three-dimensional points to the imaging plane of the second imaging device to obtain n candidate projection points, and interpolating folded phase values of the candidate projection points; and screening out correct space three-dimensional points from the candidate space three-dimensional points by taking the folded phase value of each pixel point on the imaging plane of the first imaging device and the folded phase values of the n candidate projection points corresponding to the pixel point as a basis so as to realize three-dimensional digital reconstruction. The three-dimensional reconstruction time is shortened according to the method provided by the invention.

Description

technical field [0001] The invention belongs to the technical field of optical three-dimensional digital imaging, and in particular relates to a method and device for folding phase three-dimensional digital imaging based on phase mapping. Background technique [0002] The trinocular 3D imaging system is a non-contact, full-field measurement optical 3D digital imaging system. The system uses a projection device to project a group of sinusoidal gratings or quasi-sine gratings onto the object surface, uses an imaging device to collect the fringe pattern modulated by the surface shape of the object, and uses phase shift technology to calculate the space folding phase value of each measurement point, and then directly The three-dimensional information of the object surface is calculated by using the folded phase information. The trinocular 3D imaging system has been widely used due to its high imaging density, high imaging speed, high measurement accuracy and high measurement un...

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a folded phase three-dimensional digital imaging method and device based on phase mapping, aiming to solve the problems of slow processing speed and long time-consuming in the whole process of projection acquisition and three-dimensional reconstruction

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