Three-dimensional imaging method and system based on light field

Abstract

The invention provides a three-dimensional imaging method based on a light field. The three-dimensional imaging method specifically comprises a step of acquiring structured light field information ofa measured object, a step of processing the structured light field information of the measured object according to the structured light field information of the measured object and extracting folded phase coding field information of the measured object, a step of carrying out continuous processing on the folded phase coding field information of the measured object to obtain response information ofthe measured object in a depth range, and a step of realizing three-dimensional reconstruction of the measured object according to the response information of the measured object in the depth range.According to the invention, after the light field information of the measured object is obtained, the coding information is continuously processed, the measurement can be completed only through localcalculation without unfolding and folding a phase coding field, the time cost of projection and acquisition is saved, the measurement efficiency is improved, the problem of robustness is avoided, andthe anti-interference capability of the measurement is enhanced.

Description

technical field [0001] The invention relates to the technical field of optical imaging, especially the field of three-dimensional imaging based on light field. Background technique [0002] The structured light illumination based on fringe projection projects the sinusoidal fringe pattern onto the surface of the object, and the modulated phase can be demodulated through the collected deformed fringe pattern, thus providing encoded information for 3D imaging and measurement. [0003] The arctangent operation in the phase demodulation process obtains the phase folded within a phase cycle range, that is, the folded phase. Using the folded phase directly may cause ambiguity problems. To avoid the ambiguity problem, the folded phase can be phase unwrapped to obtain a continuous phase distribution. [0004] At present, there are two typical phase unwrapping methods, which are spatial phase unwrapping and temporal phase unwrapping. Spatial phase unwrapping relies on the phase re...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a light field three-dimensional imaging method without phase unwrapping, aiming to solve the low efficiency and robustness problems of three-dimensional imaging and measurement

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