Feature extraction

Features used

DC Mall

University scene

K

OA (%)

Mean

SD

K

OA (%)

Mean

SD

Proposed ALS

Approximate

0.96

97.2

95.43

2.35

0.81

83.4

82.8

0.64

First generation DWT

Haar

Detail

0.88

90.1

90

0.15

0.66

69

65.2

2.49

Db4

Detail

0.93

95.23

91.42

3.76

0.65

67.7

58

3.7