不同颜色照明下的水下成像差异研究

孙杰; 王红萍; 张丹; 余义德

doi:10.11993/j.issn.2096-3920.2023-0046

不同颜色照明下的水下成像差异研究

doi: 10.11993/j.issn.2096-3920.2023-0046

中国人民解放军91550部队, 辽宁大连, 116023

详细信息

作者简介:
孙杰：孙　杰(1985-), 女, 硕士, 高级工程师, 主要研究方向为水下测量

中图分类号: TJ630.34; U674
计量
- 文章访问数: 71
- HTML全文浏览量: 14
- PDF下载量: 29
- 被引次数: 0
出版历程
- 收稿日期: 2023-05-19
- 修回日期: 2023-06-16
- 录用日期: 2023-06-27

Difference between Underwater Imaging with Illumination Sources with Different Colors

91550^th Unit, the People’s Liberation Army of China, Dalian 116023, China

摘要

摘要: 针对低照度、浑浊水质环境中水下成像系统观测能力受限的问题, 从辅助照明光源的角度, 设计了水池实验方案, 分析不同浑浊程度的水质条件下光源光谱特性对水介质散射特性的影响。实测数据分析表明, 不同颜色的辅助光照明下, 水体的散射系数存在差异, 低浓度的水体对蓝光的散射系数较大, 蓝光照明的成像效果并不理想, 而随着浓度增加, 红光的散射系数逐渐接近甚至大于蓝光。研究结果不仅有助于优化水下成像系统中照明光源的参数设置, 而且能够为去散射方法的应用, 以及获取高质量的水下观测视频提供强有力的技术理论支撑。
- 水下成像 /
- 辅助光源 /
- 散射特性
Abstract: Since the observation ability of underwater imaging systems is limited in the environment of low illumination and turbid water, the experimental scheme of the pool was designed from the perspective of an auxiliary illumination source. The influence of spectral characteristics of illumination source on scattering characteristics of water medium under different turbidity conditions was analyzed. The analysis of measured data shows that the scattering coefficients of water bodies are different under the auxiliary illumination sources with different colors. The scattering coefficient of blue light is larger in water with low concentration, and the imaging with blue light is not ideal. The scattering coefficient of red light is larger than that of blue light with increasing concentration. The research results not only help to optimize the parameters of illumination sources in underwater imaging systems but also provide strong technical and theoretical support for applying de-scattering methods and obtaining high-quality underwater observation videos.
- underwater imaging /
- auxiliary illumination source /
- scattering characteristic

HTML全文

图 1 光在水下传播导致颜色失真示意图

Figure 1. Color distortion caused by underwater light pro- pagation

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图 2 光在海水中的衰减系数随波长变化曲线

Figure 2. Attenuation coefficient change of light in seawater with wavelength

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图 3 干净海水光谱吸收和散射特性

Figure 3. Spectral absorption and scattering characteristics of clean seawater

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图 4 光的前向散射和后向散射

Figure 4. Forward scattering and backscattering of light

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图 5 水下成像示意图

Figure 5. Underwater imaging

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图 6 辅助照明实验系统示意图

Figure 6. Auxiliary illumination experiment system

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图 7 3种不同浑浊程度水体中的采集图像

Figure 7. Images acquired in water bodies with three di- fferent levels of turbidity

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图 8 不同颜色光源照明下的采集图像

Figure 8. Images acquired by illumination sources with different colors

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图 9 EME值随水体颗粒物浓度变化曲线

Figure 9. EME values with concentration of particulate matter in water

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图 10 散射系数随水体颗粒物浓度变化曲线

Figure 10. Scattering coefficient with concentration of par- ticulate matter in water

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表 1 不同颜色光源照明条件下散射系数测试结果

Table 1. Test results of scattering coefficient under illu- mination sources with different colors

颗粒物浓度/(g/m³)	红光	绿光	蓝光	无光	白光
0.000 0	0.018 6	0.034 8	0.048 6	0.003 0	0.032 5
2.116 1	0.026 9	0.039 0	0.054 3	0.010 2	0.037 5
3.526 8	0.045 4	0.038 4	0.060 8	0.027 7	0.043 0
4.232 2	0.054 3	0.056 9	0.082 6	0.039 0	0.057 6
4.937 5	0.063 1	0.056 7	0.086 9	0.046 8	0.062 7
5.642 9	0.071 5	0.065 8	0.091 7	0.055 6	0.071 1
6.348 2	0.089 8	0.072 2	0.098 1	0.061 1	0.075 7
7.053 6	0.108 8	0.088 3	0.113 3	0.067 0	0.095 6
7.758 9	0.123 5	0.101 4	0.132 7	0.070 6	0.111 4
8.464 3	0.142 9	0.113 6	0.136 5	0.073 6	0.124 0
9.169 7	0.151 8	0.125 6	0.164 8	0.076 1	0.137 5
9.875 0	0.168 9	0.137 4	0.174 6	0.078 3	0.154 8
10.580 4	0.175 7	0.143 1	0.180 5	0.081 0	0.164 5
11.285 7	0.187 2	0.152 3	0.179 7	0.083 4	0.170 5

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