Table 3.

Water body classification comparison of three algorithms.

Place	Methods	OA (%)	Kappa
Area 1	Otsu threshold	98.31	0.920227
Area 2	Otsu threshold	99.94	0.997037
Area 3	Otsu threshold	99.68	0.979753
Average		99.31	0.965672
Area 1	SVM	99.19	0.960726
Area 2	SVM	99.83	0.99122
Area 3	SVM	99.90	0.993993
Average		99.64	0.98198
Area 1	RF	99.82	0.990937
Area 2	RF	99.40	0.967351
Area 3	RF	99.86	0.991213
Average		99.69	0.983167
Area 1	Proposed method	99.88	0.993539
Area 2	Proposed method	99.90	0.994273
Area 3	Proposed method	99.92	0.994965
Average		99.90	0.994259