Researching | Rapid extraction algorithm of laser alarm spot center based on projection segmentation

Journal of Applied Optics, Volume. 45, Issue 6, 1170(2024)

Rapid extraction algorithm of laser alarm spot center based on projection segmentation

Zhentao WU1...2, Rui ZHANG2,3, Wenyue LI4, Yanxiang CHANG4, Yaqi WANG2,5, Shuai YANG2,5, Peng XUE2,5, and Zhibin WANG12,* |Show fewer author(s)

Author Affiliations

¹North University of China, School of Instrument and Electronics, Taiyuan Shanxi 030051, China

²Technology Innovation Center of Shanxi Provincial for Intelligent Microwave Photoelectric, North University of China, Taiyuan, Shanxi 030051, China

³North University of China, School of information and communication engineering, Taiyuan Shanxi 030051, China

⁴Military Representative Office of military equipment department in Beijing, Taiyuan Shanxi 030051, China

⁵North University of China, School of electrical and control engineering, Taiyuan Shanxi 030051, China

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Figures&Tables (15)

References (19)

Paper Information

Figures & Tables(15)

$Diagram of grating diffractive laser warning principle$

Fig. 1. Diagram of grating diffractive laser warning principle

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Fig. 2. Block diagram of laser alarm system

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Fig. 3. Schematic diagram of spot projection

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$Diffraction images and filtering results$

Fig. 4. Diffraction images and filtering results

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Fig. 5. Coordinate axis projection results

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Fig. 6. Schematic diagram of y-coordinate correction

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Fig. 7. Hardware design of FPGA image processing

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Fig. 8. Generation of 3×3 sliding window module

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Fig. 9. Program simulation results

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Fig. 10. Laser alarm experimental test device

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$Relationship between angle of incidence and diffraction image variation$

Fig. 11. Relationship between angle of incidence and diffraction image variation

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$Extraction of diffraction spot centers at all levels$

Fig. 12. Extraction of diffraction spot centers at all levels

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Fig. 13. Accuracy analysis of coordinate center extraction

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Table 1. Parameters related to laser alarm system

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Table 1. Parameters related to laser alarm system

器件	参数	取值
黑白光栅	缝宽/μm	2.5
	光栅常数/μm	5.5
	尺寸大小/mm²	32×32
光学镜头	焦距/mm	14
	竖直视场/(°)	±36
	水平视场/(°)	±45
探测器	像元大小/μm²	15×15
	像元阵列/像素	640×512
	响应波段/μm	0.9 ～1.7

Table 2. FPGA programming analysis

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Table 2. FPGA programming analysis

指标参数		投影快速检测算法	传统圆检测算法
响应时间	帧周期构成	T_read +T_hold	T_read
	帧周期消耗	1	3
	响应时间/ms	17.453	51.759
硬件消耗	组合逻辑	1 630	12 661
	时序逻辑	2 456	2 979
	存储单元/bit	507 372	1 665 668

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Zhentao WU, Rui ZHANG, Wenyue LI, Yanxiang CHANG, Yaqi WANG, Shuai YANG, Peng XUE, Zhibin WANG. Rapid extraction algorithm of laser alarm spot center based on projection segmentation[J]. Journal of Applied Optics, 2024, 45(6): 1170

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Paper Information

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Received: Mar. 27, 2024

Accepted: --

Published Online: Jan. 14, 2025

The Author Email: WANG Zhibin (王志斌)

DOI:10.5768/JAO202445.0602001

Topics

laser devices and laser physics

Lasers and Laser Optics

laser manufacturing

Instrumentation, Measurement and Metrology