Projector calibration based on cross ratio invariance

doi:10.37188/CO.2020-0111

CORC > 长春光学精密机械与物理研究所 > 中国科学院长春光学精密机械与物理研究所

	Projector calibration based on cross ratio invariance
	J.-B. Yang; J. Zhao and Q. Sun
刊名	Chinese Optics
	2021
卷号	14 期号:2 页码:320-328
ISSN号	20951531
DOI	10.37188/CO.2020-0111
英文摘要	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.
URL标识	查看原文
内容类型	期刊论文
源URL	[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.