Measurement Method of Gun’s Jump Angle Based on Improved Least-Squares

Man Jiang; Jun Wang; Bojun Du; Haifeng Wang; Haisong Chen

doi:10.3788/LOP57.030701

Journals >Laser & Optoelectronics Progress >Volume 57 >Issue 3 >Page 030701 > Article

Laser & Optoelectronics Progress
Vol. 57, Issue 3, 030701 (2020)

Measurement Method of Gun’s Jump Angle Based on Improved Least-Squares

Man Jiang^1、*, Jun Wang^1、2、**, Bojun Du^2、3, Haifeng Wang³, and Haisong Chen¹

Author Affiliations

¹School of Electronic and Information Engineering, Suzhou University of Science and Technology, Suzhou, Jiangsu 215009, China

²Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, Jilin 130033, China

³Center of Arms Experiment of Baicheng, Baicheng, Jilin 137000, China

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DOI: 10.3788/LOP57.030701 Cite this Article Set citation alerts

Man Jiang, Jun Wang, Bojun Du, Haifeng Wang, Haisong Chen. Measurement Method of Gun’s Jump Angle Based on Improved Least-Squares[J]. Laser & Optoelectronics Progress, 2020, 57(3): 030701 Copy Citation Text

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Fig. 1. Schematic of gun’s jump angle measurement based on improved least-squares

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Fig. 2. Calculation process of gun’s jump angle based on improved least-squares

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Fig. 3. Comparison of circle center fitting algorithms for muzzle images. (a) Original image; (b) result of least squares circle fitting algorithm; (c) result of radius difference accumulation minimization algorithm

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Fig. 4. Comparison of coordinates error

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Fig. 5. Comparison of jump angle errors

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Measurement No.		1	2	3	4	5	6	7	8
	x /pixel	511.15	511.05	511.05	511.15	510.90	511.10	511.15	510.90
Algorithmproposed	y /pixel	511.20	511.15	511.20	510.95	511.20	511.05	510.85	511.20
	Δx /pixel	0.15	0.05	0.05	0.15	0.10	0.10	0.15	0.10
	Δy /pixel	0.20	0.15	0.20	0.05	0.20	0.05	0.15	0.20
	x /pixel	511.55	512.00	511.65	511.40	511.20	511.40	511.60	511.30
Least squaresalgorithm	y /pixel	511.80	511.45	511.20	511.85	511.30	511.65	511.30	511.65
	Δx /pixel	0.55	1.00	0.35	0.40	0.20	0.40	0.60	0.30
	Δy /pixel	0.80	0.45	0.20	0.15	0.30	0.65	0.30	0.35

Table 1. Comparison of calculation results of the two center positioning algorithms for muzzle images

Measurement No.			1	2	3	4	5	6	7	8
Ideal values	Jump angle /(')	θ	5.32	5.54	5.25	5.26	5.92	5.17	5.91	5.62
	Center deviation /pixel	Δx	0.15	0.05	0.05	0.15	0.10	0.10	0.15	0.10
Algorithmproposed		Δy	0.20	0.15	0.20	0.05	0.20	0.05	0.15	0.20
	Jump angle /(')	θ	5.46	5.25	5.35	5.40	5.43	5.10	5.78	5.71
	Center deviation /pixel	Δx	0.55	1.00	0.35	0.40	0.20	0.40	0.60	0.30
Least squaresalgorithm		Δy	0.80	0.45	0.20	0.15	0.30	0.65	0.30	0.35
	Jump angle /(')	θ	6.23	6.26	5.68	4.83	6.63	6.03	5.14	5.12

Table 2. Comparison of jump angle calculation results

Man Jiang, Jun Wang, Bojun Du, Haifeng Wang, Haisong Chen. Measurement Method of Gun’s Jump Angle Based on Improved Least-Squares[J]. Laser & Optoelectronics Progress, 2020, 57(3): 030701

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