Table 3 Cloud semantic categories considered in CloudSEN12. Lower priority levels indicate greater relevance.
From: CloudSEN12, a global dataset for semantic understanding of cloud and cloud shadow in Sentinel-2
Code | Class | Superclass 1 | Superclass 2 | Description | Priority |
|---|---|---|---|---|---|
0 | Clear | non-cloud | valid | Pixels without cloud and cloud shadow contamination. | 4 |
1 | Thick Cloud | cloud | invalid | Opaque clouds that block all the reflectance from the Earth’s surface. | 1 |
2 | Thin Cloud | cloud | invalid | Semitransparent cloud that alters the surface spectral signal but still allows to recognize the background. | 3 |
3 | Cloud Shadow | non-cloud | invalid | Dark pixels thrown by a thick or thin cloud. | 2 |
