Spot center approximation method with minimum gray-scale difference of indexed ring

Sample		Grayscale centroid	Circle fitting	Hough transform	Gaussian fitting	MGDIR
A	$η_{x}$	0.0013	0.0157	0.0683	0.0058	0.0010
	$η_{y}$	0.0011	0.0145	0.0650	0.0048	0.0009
B	$η_{x}$	0.0023	0.0179	0.0702	0.0063	0.0013
	$η_{y}$	0.0028	0.0210	0.0944	0.0081	0.0015
C	$η_{x}$	0.0030	0.0249	0.0922	0.0078	0.0016
	$η_{y}$	0.0013	0.0142	0.0560	0.0054	0.0010
Mean	${\bar{η}}_{x}$	0.0022	0.0195	0.0769	0.0066	0.0013
	${\bar{η}}_{y}$	0.0017	0.0166	0.0718	0.0061	0.0011

Table 2. Standard deviation of calculation results for each group of samples under different algorithms pixel

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Table 2. Standard deviation of calculation results for each group of samples under different algorithms pixel

Sample		Grayscale centroid	Circle fitting	Hough transform	Gaussian fitting	MGDIR
A	$σ_{x}$	0.1732	0.9012	0.6009	3.1902	0.1438
	$σ_{y}$	0.4284	1.9142	0.4007	2.8300	0.0883
B	$σ_{x}$	0.2280	1.4130	0.5451	0.9304	0.2099
	$σ_{y}$	0.2926	1.7706	0.4476	4.2623	0.2228
C	$σ_{x}$	0.9059	1.7877	0.4633	4.4890	0.1421
	$σ_{y}$	1.3137	2.6240	0.5496	3.2876	0.2468
Mean	${\bar{σ}}_{x}$	0.4537	1.3673	0.5364	2.8699	0.1653
	${\bar{σ}}_{y}$	0.6782	2.1029	0.4660	3.4600	0.1860

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Yaqi WANG, Xiao LI, Rui ZHANG, Zhibin WANG, Shuai YANG, Zhentao WU, Zewei ZHAO. Spot center approximation method with minimum gray-scale difference of indexed ring[J]. Journal of Applied Optics, 2025, 46(3): 622

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Paper Information

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Received: May. 29, 2024

Accepted: --

Published Online: May. 28, 2025

The Author Email: Xiao LI (李晓)

DOI:10.5768/JAO202546.0302002

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology