Journal of Geo-information Science ›› 2020, Vol. 22 ›› Issue (10): 1959-1970.doi: 10.12082/dqxxkx.2020.190489
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XU Jiafeng(), LI Yunmei*(
), XU Jie, LEI Shaohua, BI Shun, ZHOU Ling
Received:
2019-09-04
Revised:
2019-12-10
Online:
2020-10-25
Published:
2020-12-25
Contact:
LI Yunmei
E-mail:516787702@qq.com;liyunmei@njnu.edu.cn
Supported by:
XU Jiafeng, LI Yunmei, XU Jie, LEI Shaohua, BI Shun, ZHOU Ling. Adaptive Threshold for Surface Shadow Detection of Black and Odor Water[J].Journal of Geo-information Science, 2020, 22(10): 1959-1970.DOI:10.12082/dqxxkx.2020.190489
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Tab. 1
Main technical parameters of the instrument and equipment"
序号 | 仪器设备名称 | 主要技术指标 |
---|---|---|
1 | 大疆M600 pro多旋翼 无人机 | 旋翼数量:6个 轴距:1133 mm 起飞重量:15.5 kg 最大载荷:6 kg 最大水平飞行速度:65 km/h(无风环境) 最大续航时间:60 min(空载)18 min (5.5 kg载重) 实用升限:4500 m |
2 | ZK-VNIR-FPG480机 载高光谱 成像仪 | 光谱范围:400~1000 nm 光谱分辨率:2.8 nm 光谱通道数:270个 空间通道数:480个 空间分辨率:0.08 m(120 m高度) (35 mm镜头) 视场角:26° A/D转换:12 bits 最大帧频:100 fps 数据接口:GigE 最大功耗:20 W 外形尺寸:310×87×87 mm 重量:2.2 kg 成像方式:采用外置推扫连续成像,采集画幅无限制,扫描路线一次成图,影像无畸变 |
Tab. 3
The pixel proportion of black and odor water identified before and after shadow extraction"
测试场景 | 阴影提取前 | 阴影提取后 | |||||||
---|---|---|---|---|---|---|---|---|---|
黑臭水体 像元数/个 | 正常水体 像元数/个 | 黑臭像元 占比/% | 正常水体 像元占比/% | 黑臭水体 像元数/个 | 正常水体 像元数/个 | 黑臭像元 占比/% | 正常水体 像元占比/% | ||
测试场景1 | 16 859 | 5622 | 74.99 | 25.01 | 7235 | 140 | 98.10 | 1.90 | |
测试场景2 | 27 202 | 7450 | 78.50 | 21.50 | 13 040 | 112 | 99.15 | 0.85 | |
测试场景3 | 13 612 | 12 885 | 51.37 | 48.63 | 10 445 | 533 | 95.14 | 4.86 | |
测试场景4 | 17 827 | 6106 | 74.49 | 25.51 | 12 130 | 928 | 92.89 | 7.11 |
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