Three-dimensional reconstruction method and system based on structured photoperiod encoding pattern

Abstract

The present application provides a method and system for three-dimensional reconstruction of coded patterns based on structured light cycles, including: projecting a coded pattern with a specified number of phase shift steps on the surface of a target object, and collecting the reflection pattern of each frame of the coded pattern on the surface of the target object; according to For the reflection pattern corresponding to each frame encoding pattern, calculate the measurement phase of each pixel of the reflection pattern; according to the established phase error relationship, obtain the correction phase corresponding to the measurement phase; the correction phase corresponds to the encoding pattern of the specified number of phase shift steps; according to The corrected phase of each pixel of the reflection pattern constructs the three-dimensional shape information of the target object surface. The technical solution provided by the present application can use any periodic coding pattern to carry out three-dimensional reconstruction of the target object, can quickly obtain accurate phases for three-dimensional reconstruction, and improve the accuracy of three-dimensional reconstruction.

Description

technical field [0001] The present application relates to the technical field of image processing, in particular to a three-dimensional reconstruction method and system based on structured light periodic coding patterns. Background technique [0002] Phase shift structured light technology is a fast and accurate technology for 3D reconstruction. In phase-shifted structured light, different coding patterns include sinusoidal patterns, binary patterns, triangular patterns, trapezoidal patterns, line coding patterns, etc., which are designed for high-precision 3D reconstruction. [0003] Each encoded pattern requires a specific decoding method to obtain the phase for 3D reconstruction. The designed projected pattern may be distorted due to the quality of the projector, although the periodicity of the distorted pattern can generally be guaranteed. However, if the traditional decoding method is used to decode the distorted pattern, there will be errors in the obtained phase, re...

AI Technical Summary

Problems solved by technology

However, if the traditional decoding method is used to decode the distorted pattern, the obtained phase will have errors, resulting in low-quality 3D reconstruction results

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