Research Article
Automatic Extraction of Water Bodies from Landsat Imagery Using Perceptron Model
Table 1
Accuracy of extracted water bodies using different threshold and varying size parameter.
| | | Threshold (SWIR band) (down) | Size parameter | | | 0 | 10 | 20 | 30 | 40 | 50 | 60 | 75 |
| | Threshold = 1 | 40 | 87.8825 | 90.7341 | 91.6593 | 93.6111 | 93.5685 | 92.5338 | 92.4912 | 92.4498 | | 50 | 88.9319 | 94.5407 | 94.3807 | 94.2898 | 94.215 | 94.1765 | 94.113 | 91.0259 | | 60 | 88.2844 | 89.3198 | 90.9271 | 93.6396 | 93.4529 | 88.292 | 88.1695 | 87.0074 | | 65 | 89.8477 | 90.6066 | 91.0663 | 92.7371 | 92.4333 | 90.197 | 89.0622 | 88.7628 |
| | Threshold = 2 | 40 | 92.9821 | 94.2557 | 95.2092 | 96.7341 | 96.9123 | 95.1222 | 93.0959 | 93.0959 | | 50 | 93.4704 | 93.3797 | 95.3332 | 96.3121 | 96.2012 | 95.2323 | 93.2049 | 93.2059 | | 60 | 93.4724 | 93.3817 | 94.3345 | 95.3122 | 96.3109 | 95.2323 | 93.205 | 93.2061 | | 65 | 92.4724 | 93.3817 | 94.3345 | 94.3311 | 94.3212 | 93.2323 | 93.205 | 93.2061 |
| | Threshold = 3 | 40 | 92.3048 | 93.2229 | 93.1794 | 93.1417 | 93.114 | 93.0978 | 93.0724 | 93.0204 | | 50 | 92.3062 | 93.224 | 93.1796 | 94.1441 | 94.114 | 93.0978 | 93.0724 | 93.0204 | | 60 | 92.406 | 93.224 | 93.1796 | 93.1441 | 93.114 | 93.0978 | 93.0724 | 93.0204 | | 65 | 93.4261 | 92.224 | 94.1796 | 93.1441 | 93.114 | 93.0978 | 92.0724 | 92.0204 |
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