Segmentation > Basic Threshold
Selects pixels as black or white based on whether they are below or above a certain pixel value. “Auto” determines this threshold value using Otsu’s method which chooses the value which minimizes the average variance of the pixels which have been turned black and white.
- Manual: Allows manual selection of threshold value
- Auto: Auto-determines threshold value based on Otsu’s method 
- Adjustment: Specifies offset to make to auto-determined threshold value.
Threshold value which sets pixels over this value as white and under this value as black
 Otsu, N., “A Threshold Selection Method from Gray-Level Histograms,” IEEE Transactions on Systems, Man, and Cybernetics, Vol. 9, No. 1, 1979, pp. 62-66.
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