高分四号卫星数据云和云阴影检测算法 
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Cloud and Cloud Shadow Detection Algorithm for Gaofen-4 Satellite Data
山东科技大学测绘科学与工程学院, 山东 青岛 266510
图 & 表
图 1. 不同地物在反射波段的光谱特征
Fig. 1. Spectral characteristics of different features in reflectance bands
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图 2. GF-4云检测算法流程
Fig. 2. Flow chart of GF-4 cloud detection algorithm
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图 3. 云和云阴影之间的几何关系
Fig. 3. Geometric relationship between clouds and cloud shadows
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图 4. GF-4云阴影检测算法流程
Fig. 4. Flow chart of GF-4 cloud shadow detection algorithm
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图 5. 不同区域、不同云型的云检测结果
Fig. 5. Cloud detection results of different clouds in different regions
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图 6. 不同区域、不同云型的云阴影检测结果
Fig. 6. Cloud shadow detection results of different clouds in different regions
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图 7. 动态光谱阈值法与云和云阴影匹配法的云阴影结果对比
Fig. 7. Comparison of cloud shadow detection results of DST with CCM
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表 1云像元检测结果的定量分析
Table1. Quantitative analysis of cloud image pixel detection results
| Underlying surface | Images | Correct /% | Commission rate /% | Omission rate /% | Sky correct /% |
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| Bare soil | A1 | 85.53 | 0.76 | 14.47 | 99.24 | | A2 | 89.48 | 0.92 | 10.52 | 99.08 | | A3 | 82.94 | 0.38 | 17.05 | 99.62 | | Desert | B1 | 89.28 | 2.41 | 10.72 | 97.59 | | B2 | 94.76 | 10.21 | 5.24 | 89.79 | | B3 | 82.26 | 0.92 | 17.74 | 99.08 | | Vegetation | C1 | 92.99 | 0.42 | 7.01 | 99.58 | | C2 | 90.61 | 0.11 | 9.39 | 99.89 | | C3 | 95.47 | 2.22 | 4.53 | 97.78 | | Water | D1 | 91.46 | 0.73 | 8.54 | 99.27 | | D2 | 92.84 | 3.88 | 7.16 | 96.12 | | D3 | 84.32 | 0.18 | 15.68 | 99.82 |
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表 2云阴影像元检测结果的定量分析
Table2. Quantitative analysis of cloud shadow image pixel detection results
| Underlying surface | Images | Correct /% | Commission rate /% | Omission rate /% | Sky correct /% |
|---|
| Bare soil | A1 | 78.40 | 0.08 | 21.60 | 99.92 | | A2 | 88.71 | 3.45 | 11.29 | 96.55 | | A3 | 71.93 | 0.20 | 11.42 | 99.80 | | Desert | B1 | 88.58 | 1.96 | 11.42 | 98.04 | | B2 | 70.22 | 0.70 | 29.78 | 99.30 | | B3 | 88.65 | 3.25 | 11.35 | 96.75 | | Vegetation | C1 | 86.79 | 0.62 | 13.21 | 99.38 | | C2 | 84.92 | 0.38 | 15.08 | 99.62 | | C3 | 81.76 | 0.13 | 18.24 | 99.87 | | Water | D1 | 86.61 | 2.01 | 13.39 | 97.99 | | D2 | 88.86 | 3.09 | 11.14 | 96.91 | | D3 | 97.96 | 0.53 | 12.04 | 99.47 |
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刘心燕, 孙林, 杨以坤, 周雪莹, 王权, 陈婷婷. 高分四号卫星数据云和云阴影检测算法[J]. 光学学报, 2019, 39(1): 0128001. Xinyan Liu, Lin Sun, Yikun Yang, Xueying Zhou, Quan Wang, Tingting Chen. Cloud and Cloud Shadow Detection Algorithm for Gaofen-4 Satellite Data[J]. Acta Optica Sinica, 2019, 39(1): 0128001.
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