Table 3 Optimal threshold levels obtained by various optimization algorithms using EC based Otsu method.

test10

2

98,181

98,180

102,184

110,223

102,184

102,184

3

86,160,190

86,161,188

92,165,192

102,184,186

92,165,192

92,165,192

4

75,144,177,199

74,145,178,201

89,60,183,203

95,167,193,194

88,160,183,203

89,160,183,203

5

54,112,158,181,201

54,113,157,184,204

79,145,171,187,206

78,154,179,200,236

78,143,170,186,205

77,142,172,187,205

test11

2

90,172

91,174

100,182

108,154

100,182

100,182

3

83,158,190

81,160,189

91,64,194

100,182,249

91,164,194

91,164,193

4

51,115,164,193

50,114,162,199

89,160,184,209

92,164,193,241

90,161,184,209

90,160,183,208

5

49,108,151,173,197

49,106,157,170,201

59,122,163,186,210

91,162,188,218,223

62,123,163,185,210

64,122,163,186,208

test2

2

119,162

117,160

125,169

146,174

125,169

125,169

3

75,124,165

75,125,166

115,147,181

125,169,211

115,147,181

115,147,181

4

73,115,145,179

72,114,148,181

113,144,176,206

113,147,183,234

113,144,176,206

113,144,175,207

5

72,109,129,154,182

72,110,130,169,204

108,129,154,179,207

114,143,176,213,233

107,130,155,179,208

106,129,154,177,205

test3

2

74,145

72,152

124,68

145,177

124,168

124,168

3

71,127,167

71,130,171

77,133,173

123,168,215

77,133,173

78,133,173

4

80,110,142,176

80,112,152,181

74,119,151,180

81,132,172,178

73,119,151,180

73,119,150,180

5

33,69,108,139,173

42,68,110,162,200

73,114,141,165,184

72,119,147,178,181

69,114,140,164,183

72,113,138,162,183

test30

2

100,194

100,195

104,197

116,208

104,197

104,197

3

77,151,198

76,150,196

100,181,210

104,197,209

100,181,210

100,181,210

4

63,132,180,209

64,138,181,207

91,164,192,217

105,181,211,251

90,163,192,217

91,163,192,217

5

26,77,146,185,212

30,77,149,186,206

82,151,179,200,221

79,160,188,212,241

81,150,178,199,220

82,152,179,199,220

test31

2

80,141

81,150

80,145

128,207

80,145

80,145

3

77,126,164

76,130,164

77,134,176

80,145,158

77,134,176

77,134,176

4

75,119,149,180

75,120,150,178

75,120,151,181

76,135,176,220

75,120,151,181

72,120,151,180

5

74,110,131,154,181

74,111,130,154,180

75,120,151,178,207

75,120,151,183,215

77,120,151,178,207

77,120,150,179,209

test4

2

78,138

77,138

79,142

137,252

79,142

79,142

3

75,123,161

75,125,160

76,125,165

79,142,180

76,125,165

76,125,165

4

74,119,150,181

74,119,150,185

75,120,153,183

73,126,166,206

74,120,153,183

74,120,153,182

5

72,109,131,156,183

72,110,131,156,185

73,110,132,158,184

78,121,155,183,246

70,110,132,159,185

74,111,132,157,182

test5

2

72,139

70,139

74,144

137,151

74,144

74,144

3

69,122,162

69,122,162

72,125,167

74,144,168

72,125,167

72,125,167

4

72,106,118,148

72,106,118,150

71,118,151,185

71,126,168,248

71,118,151,185

69,118,152,185

5

70,117,134,169,212

70,117,136,170,210

70,112,138,167,202

78,116,148,183,191

73,112,138,167,202

65,111,138,167,201