Table 1.

Effectiveness of the proposed method compared with the related methods.

Between-Class Variance	Parameters Values	Effectiveness
The Original Otsu	Mean and variance are based on the definition of Gaussian distribution	Suitable for images with symmetric distribution but limited for asymmetric distributions
The Modified Otsu [3]	The original Otsu formula using only the mean value of the lognormal distribution	Almost have the same efficiency as the original method with improvements for certain types of images
The Proposed Model	Mean and variance are based on the definition of Lognormal distribution	Boosted efficacy for images with right-skewed intensity distributions but not suitable for left-skewed distribution.