一种基于空间编码结构光的稠密三维重建算法

doi:10.19665/j.issn1001-2400.2021.06.015

Abstract

Abstract:

The 3D reconstruction technology based on structured light has the advantages of high accuracy,fast speed,and good robustness.It is widely used in the fields of biomedicine and cultural relics restoration.It is of important theoretical significance and research value.With the rapid development of science and technology,the demand for non-contact detection and measurement of high-speed moving targets has gradually increased.The 3D reconstruction of targets with few features and fast speed has become the key to solving the problem.Compared with time coding,spatial coding only needs to shoot a single pattern,which is more suitable for 3D reconstruction of moving targets.This paper proposes a novel dense 3D reconstruction method based on spatially encoded structured light.First,a structured light encoding mode composed of sine monochrome stripes and pseudo-random points is constructed.The stripes are identified by pseudo-random points to reduce the color interference; second,a dense 3D reconstruction method based on local phase matching is proposed.The spatial resolution of point cloud is improved by obtaining the phase information on pixels between adjacent stripes for pixel matching.Finally,the method can enhance the speed of 3D reconstruction,which uses only one image pair to decode,and does not need to calibrate the projector and color correction.Experimental results show that the algorithm is feasible and effective.

Key words: surface reconstruction, structured light, projector-cameras system, Fourier transforms

CLC Number:

TP391

CHEN Rong,XU Hongli,YANG Dongxue,HUANG Hua. Dense three-dimensional reconstruction algorithm based on spatially encoded structured light[J].Journal of Xidian University, 2021, 48(6): 123-130.

Figures/Tables 8

方法	Object	$μ u p$ /像素	$ρ u p$ /像素	Δu_p/%	RMSE/mm
ZHANG’s	Sphere	0.530	1.193	83.01	2.184
文中方法	Sphere	-0.311	1.117	97.11	1.265
ZHANG’s	Cone	0.346	1.669	93.46	3.175
文中方法	Cone	-0.271	1.052	98.07	2.398
ZHANG’s	Rabbit	0.329	2.659	91.20	5.887
文中方法	Rabbit	-0.206	0.711	95.62	1.689
ZHANG’s	David	0.483	1.661	78.51	2.618
文中方法	David	-0.234	1.260	84.43	2.476

References 14

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方法	Sphere	Cone	Rabbit	David
ZHANG’s	351 165	342 765	170 650	287 308
KUMIKO’s	15 241	15 168	7 891	12 527
文中方法	371 988	362 690	188 418	317 101

Dense three-dimensional reconstruction algorithm based on spatially encoded structured light

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