Precision control model of rainfall inversion based on visual sensor nodes collaboration

Xing WANG; Mei-zhen WANG; Xue-jun LIU

doi:10.37188/OPE.20212911.2714

Optics and Precision Engineering, Volume. 29, Issue 11, 2714(2021)

Precision control model of rainfall inversion based on visual sensor nodes collaboration

Xing WANG1...2,3, Mei-zhen WANG1,2,3,*, and Xue-jun LIU1,23 |Show fewer author(s)

¹Key Laboratory of Virtual Geographic Environment （Nanjing Normal University）， Ministry of Education， Nanjing20023， China

²State Key Laboratory Cultivation Base of Geographical Environment Evolution （Jiangsu Province），Nanjing1003， China

³Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application， Nanjing21002， China

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Figures & Tables(9)

Fig. 1. The implement procedure of VRG

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Fig. 2. The deployment in the experiment area

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Fig. 3. Comparison of the effect of VRG parameter adjustment on rain streaks extraction in heavy rain scene

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Fig. 4. VRG-based RI estimation

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Fig. 5. RI estimation after PGM correction

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Fig. 6. Comparison of RE value before and after PCM correction

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Table 1. Camera parameters

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Table 1. Camera parameters

VRG ID	6， 1	2	5， 3	5， 7
型号	EZVIZ C5C	EZVIZ C5Si	EZVIZ C5Si	EZVIZ C5Si
焦距/mm	4	4	6	8
传感器CMOS/inch	1/3	1/2.7	1/2.7	1/2.7
靶面尺寸/mm	4.800×3.600	5.371×4.035	5.371×4.035	5.371×4.035
光圈	2.2	2.2	2.0	2.0
图像分辨率	1 280×960	1 920×1 080	1 920×1 080	1 920×1 080
最近对焦点/mm	1 200	1 000	2 400	4 200
前景点/mm	710	570	1 380	2 420
后景点/mm	3 880	4 290	9 400	15 770
容许弥散圆直径/mm	0.004 2	0.005 6	0.005 6	0.005 6

Table 2. Rainfall event information
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Table 2. Rainfall event information
时间降雨等级
1 2020/07/11 14：00 ~ 15：20 小雨，小雨-中雨，中雨
2 2020/07/17 12：20 ~ 13：00 大雨，大雨-暴雨，暴雨

Table 3. Parameters of rainstreak extraction model
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Table 3. Parameters of rainstreak extraction model
小雨中雨大/暴雨
$λ_{1}$ 100 110 120
$λ_{2}$ 15 10 20
$λ_{3}$ 95 100 120
$λ_{4}$ 20 15 15
$β$ 550 550 550
$k_{m a x}$ 3500 300 300
$t o l$ 0.001 0.001 0.001

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Xing WANG, Mei-zhen WANG, Xue-jun LIU. Precision control model of rainfall inversion based on visual sensor nodes collaboration[J]. Optics and Precision Engineering, 2021, 29(11): 2714

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