Projector calibration based on cross ratio invariance

doi:10.37188/CO.2020-0111

CIOMP OpenIR

	Projector calibration based on cross ratio invariance
	J.-B. Yang; J. Zhao and Q. Sun
	2021
发表期刊	Chinese Optics
ISSN	20951531
卷号	14 期号:2 页码:320-328
摘要	In order to improve the accuracy of the projector calibration in 3D shape measurement using digital fringe projection, a new projector calibration method that combines secondary projection technology and cross-ratio invariance is proposed. The secondary projection technology is used to solve the mutual interference between the projection pattern and the calibration pattern, and the cross-ratio invariance method is used to avoid introducing camera calibration error. A comparative experiment is carried out to verify the effectiveness of the proposed method. Compared with the traditional method of projector calibration that requires camera parameters and that using global homography, the RMS values of reprojection error of this method is reduced from (0.2275, 0.2264) and (0.1397, 0.0997) pixels to (0.0645, 0.0601) pixels, and the maximum value of the reprojection error is reduced from 1.222 pixels and 0.5617 pixels to 0.2421 pixels. In addition, this method allows the camera to be simultaneously calibrated during operation, and therefore the parameters of the entire 3D measurement system can be acquired. The above results show that the method proposed in this paper can prevent error propagation of camera calibration parameters and improve the calibration accuracy of a projector. Copyright 2021 Chinese Optics. All rights reserved.
DOI	10.37188/CO.2020-0111
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收录类别	EI
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/65558
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	J.-B. Yang,J. Zhao and Q. Sun. Projector calibration based on cross ratio invariance[J]. Chinese Optics,2021,14(2):320-328.
APA	J.-B. Yang,&J. Zhao and Q. Sun.(2021).Projector calibration based on cross ratio invariance.Chinese Optics,14(2),320-328.
MLA	J.-B. Yang,et al."Projector calibration based on cross ratio invariance".Chinese Optics 14.2(2021):320-328.

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