Journal of Geo-information Science ›› 2019, Vol. 21 ›› Issue (5): 789-798.doi: 10.12082/dqxxkx.2019.180418
Fangming WU(), Miao ZHANG, Bingfang WU*(
)
Received:
2018-08-29
Revised:
2019-02-20
Online:
2019-05-25
Published:
2019-05-25
Contact:
Bingfang WU
E-mail:wufm@radi.ac.cn;wubf@radi.ac.cn
Supported by:
Fangming WU, Miao ZHANG, Bingfang WU. Object-oriented Rapid Estimation of Rice Acreage from UAV Imagery[J].Journal of Geo-information Science, 2019, 21(5): 789-798.DOI:10.12082/dqxxkx.2019.180418
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Tab. 1
Core specifications of the Mavic Pro UAV"
飞行器 | 相机 | ||
---|---|---|---|
参数名称 | 参数指标 | 参数名称 | 参数指标 |
重量 | 743 g(包含云台保护罩) | 影像传感器 | 1/2.3 英寸CMOS;有效像素1235万(总像素1271万) |
最大水平飞行速度 | 65 km/h(运动模式,海平面附近无风环境) | 镜头 | FOV 78.8° 28 mm(35 mm 格式等效)f/2.2 对焦点:0.5 m至无穷远;畸变<1.5% |
飞行时间 | 27min(无风环境 25 km/h 匀速飞行) | ISO 范围 | 100~1600(照片) |
综合续航 | 21 min(普通机动,剩余15%电量) | 电子快门速度 | 8~1/8000 s |
最远续航里程 | 13 km(无风环境) | 照片最大分辨率 | 4000×3000 |
Tab. 2
Landuse classification obfuscation matrix of verification samples"
分类方法 | 地物类别 | 水稻 | 莲藕 | 树木 | 裸地 | 菜地 | 道路 | 沟渠 | 用户精度/% |
---|---|---|---|---|---|---|---|---|---|
最邻近法 | 水稻 | 42 | 1 | 1 | 95 | ||||
莲藕 | 2 | 1 | 67 | ||||||
树木 | 9 | 2 | 1 | 75 | |||||
裸地 | 12 | 1 | 92 | ||||||
菜地 | 6 | 100 | |||||||
道路 | 1 | 1 | 5 | 71 | |||||
沟渠 | 1 | 3 | 75 | ||||||
制图精度/% | 100 | 100 | 90 | 92 | 55 | 83 | 60 | ||
总体精度/% | 89 | ||||||||
kappa系数 | 0.84 | ||||||||
支持向量机法 | 水稻 | 42 | 100 | ||||||
莲藕 | 2 | 1 | 2 | 40 | |||||
树木 | 9 | 2 | 1 | 100 | |||||
裸地 | 12 | 1 | 88 | ||||||
菜地 | 6 | 43 | |||||||
道路 | 1 | 1 | 5 | 100 | |||||
沟渠 | 1 | 3 | 42 | ||||||
制图精度/% | 100 | 100 | 90 | 54 | 55 | 67 | 60 | ||
总体精度/% | 82 | ||||||||
kappa系数 | 0.75 | ||||||||
随机森林法 | 水稻 | 42 | 1 | 98 | |||||
莲藕 | 2 | 1 | 67 | ||||||
树木 | 8 | 1 | 100 | ||||||
裸地 | 12 | 3 | 80 | ||||||
菜地 | 7 | 2 | 78 | ||||||
道路 | 1 | 4 | 80 | ||||||
沟渠 | 1 | 2 | 3 | 50 | |||||
制图精度/% | 100 | 100 | 80 | 92 | 64 | 67 | 60 | ||
总体精度/% | 88 | ||||||||
kappa系数 | 0.73 |
Tab. 3
Accuracy assessment for land surface acreage"
类别 | 实测面积/m2 | 最邻近法 | 支持向量机法 | 随机森林法 | |||||
---|---|---|---|---|---|---|---|---|---|
预测面积/m2 | 相对误差/% | 预测面积/m2 | 相对误差/% | 预测面积/m2 | 相对误差/% | ||||
水稻 | 16 508 | 16 385 | 0.75 | 15 876 | 3.83 | 16 112 | 2.40 | ||
裸地 | 1612 | 1597 | 0.93 | 531 | 67.06 | 1699 | 5.40 | ||
菜地 | 1242 | 1179 | 5.07 | 1980 | 59.42 | 1962 | 57.97 | ||
沟渠 | 1077 | 1067 | 0.93 | 1695 | 57.38 | 1385 | 28.60 | ||
莲藕 | 482 | 427 | 11.41 | 1410 | 192.53 | 567 | 17.63 | ||
树木 | 1628 | 1817 | 11.61 | 1157 | 28.93 | 866 | 46.81 | ||
道路 | 483 | 561 | 16.15 | 384 | 20.50 | 442 | 8.49 |
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