Table 4.
Blue roof extraction results of different methods based on WorldView-3 imagery.
| Methods | Type | BO | Non-BO | Row total | PA (%) | UA (%) | OA (%) | KC |
|---|---|---|---|---|---|---|---|---|
| BRSAM | BO | 4876 | 86 | 4962 | 96.73 | 98.27 | 97.5077 | 0.9502 |
| Non-BO | 165 | 4,944 | 5109 | 98.29 | 96.77 | |||
| Column total | 5041 | 5030 | 10,071 | |||||
| BGOSI | BO | 5018 | 405 | 5423 | 99.54 | 92.58 | 95.7502 | 0.9150 |
| Non-BO | 23 | 4625 | 4648 | 91.95 | 99.51 | |||
| Column total | 5041 | 5030 | 10,071 | |||||
| BOSI | BO | 4967 | 352 | 5319 | 98.53 | 93.38 | 95.7700 | 0.9154 |
| Non-BO | 74 | 4678 | 4752 | 93.00 | 98.44 | |||
| Column total | 5041 | 5030 | 10,071 | |||||
| BRSAM + BGOSI + BOSI | BO | 4817 | 17 | 4834 | 95.56 | 99.65 | 97.6070 | 0.9521 |
| Non-BO | 224 | 5013 | 5237 | 99.66 | 95.72 | |||
| Column total | 5041 | 5030 | 10,071 | |||||
| MLC | BO | 5038 | 430 | 5468 | 99.94 | 92.14 | 95.7005 | 0.9140 |
| Non-BO | 3 | 4600 | 4603 | 91.45 | 99.93 | |||
| Column total | 5041 | 5030 | 10,071 |