Proposed Method

Sens.

Spec.

Acc.

Prec.

NPV

FPR

FNR

RGB & Median filter

95.0%

99.2%

97.1%

99.16%

95.20%

0.8%

5.0%

RGB & Minimum filter

94.4%

99.0%

96.7%

98.95%

94.64%

1.0%

5.6%

HSV & Median filter

98.0%

94.2%

96.1%

93.57%

97.92%

5.8%

2.0%

HSV & Minimum filter

99.0%

93.2%

96.1%

94.41%

98.93%

6.8%

1.0%

Prevalence = 50%

$Prevalence=\frac{{\displaystyle \sum \text{contitionpositive}}}{{\displaystyle \sum \text{totalpopulation}}}$