A robust sub-pixel subdivision algorithm for image-type angular displacement measurement

doi:10.1016/j.optlaseng.2017.09.006

CIOMP OpenIR

	A robust sub-pixel subdivision algorithm for image-type angular displacement measurement
	Yu, H.; Wan, Q. H.; Lu, X. R.; Zhao, C. H.; Du, Y. C.
	2018
发表期刊	Optics and Lasers in Engineering
ISSN	0143-8166
卷号	100 页码:234-238
摘要	The use of an image detector to receive grating images and measure angle displacement via image processing is a relatively new technique, which yields higher resolution and better precision than the traditional moire fringe method. To improve the robustness of image-type angle measurement, this paper proposes a robust sub pixel subdivision algorithm based on the least square method. Firstly, by analyzing the characteristic of grating image, a new subdivision algorithm is established based on the least square method. Secondly, the simulations of robustness are completed to prove the performance in theoretically. Lastly, the proposed algorithm is used in a typical image-type angle sensor to test the performance in real case. By test, the proposed method is shown to be more accurate and with better robust than the traditional algorithm (centroid algorithm). In a typical image-type angle sensor, it successfully achieves a resolution of 0.62 '' (21-bit), 2(13)-fold subdivision resolution, and precision of 12.85 ''. The results presented here may provide a theoretical and technological foundation for further research on small-size, high-resolution photographic rotary encoders. (C) 2017 Elsevier Ltd. All rights reserved.
关键词	absolute rotary encoder high-resolution sensor Optics
DOI	10.1016/j.optlaseng.2017.09.006
收录类别	SCI ; EI
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/60878
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	Yu, H.,Wan, Q. H.,Lu, X. R.,et al. A robust sub-pixel subdivision algorithm for image-type angular displacement measurement[J]. Optics and Lasers in Engineering,2018,100:234-238.
APA	Yu, H.,Wan, Q. H.,Lu, X. R.,Zhao, C. H.,&Du, Y. C..(2018).A robust sub-pixel subdivision algorithm for image-type angular displacement measurement.Optics and Lasers in Engineering,100,234-238.
MLA	Yu, H.,et al."A robust sub-pixel subdivision algorithm for image-type angular displacement measurement".Optics and Lasers in Engineering 100(2018):234-238.

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