2.5.1 Basic color features
Basic color features for the images were obtained
from 8 color components. Those features were mean
(μ), standard deviation (σ), kurtosis (k), skewness (s), and
mean Laplacian (f''(xij))[18]. Equations of these features
were provided in Appendix A. By computing these
features for 8 color components, 40 basic color features
were obtained.