Introduction - If you have any usage issues, please Google them yourself
If we know some properties of the image, than thresholding process only needs to ensure this property is satisfied.
In a printed text image, if we know the ratio of area between the sheet and character, then we can choose satisfied threshold value for that.
Histogram shape analysis
Estimating Gaussian parameters by minimizing MSE between actual and model in an iterative computation
Need initial values.