A three-dimensional reconstruction method and device based on digital focusing structured illumination light field

Abstract

Embodiments of the present invention provide a method and device for three-dimensional reconstruction of light field based on digital focusing structured illumination. The method includes: acquiring four-dimensional light field information of an object to be measured; digitally reconstructing the four-dimensional light field information by using a spatial domain digital focusing method Focusing processing to obtain the focal plane sequence image; fringe analysis by Fourier transform profilometry to obtain the wrapped phase map; phase unwrapping the wrapped phase map to obtain the absolute phase difference between the reference fringe and the deformed fringe; according to the absolute phase difference Obtain the height information of the surface of the object to be measured, and then restore the three-dimensional shape information of the object to be measured. The present invention obtains projection pictures with different depths of field through digital focusing, uses Fourier transform profilometry for fringe analysis, and then uses single-frequency projection fringe space phase expansion technology to obtain absolute phase, thereby obtaining three-dimensional reconstruction results. This method overcomes the traditional camera Depth of field is limited and no mechanical focus is required.

Description

technical field [0001] Embodiments of the present invention relate to the field of stereo vision, and in particular to a method and device for three-dimensional reconstruction based on a digital focusing structured illumination light field. Background technique [0002] With the rapid development of information technology and robot technology, the demand for accurate acquisition of three-dimensional data on the surface of objects to meet diverse applications is becoming increasingly strong. High-precision three-dimensional measurement technology is widely used in the measurement and processing of precision industrial components, medical image reconstruction, aerial surveying and mapping, reverse reconstruction of model appliances and other fields. In addition to traditional industrial and medical applications, emerging technology fields such as unmanned driving, intelligent robots, and smart cities that have emerged with the wave of artificial intelligence also require the p...

AI Technical Summary

Problems solved by technology

[0004] The existing 3D reconstruction method uses a traditional ordinary camera to shoot objects for 3D reconstruction, which requires the user to carefully select the camera parameters before shooting, and requires multiple mechanical adjustments during the shooting process, taking pictures of objects in each depth of field, and the operation is cumbersome and less efficient

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