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Adaptive binarization

AForge.NET framework provides several adaptive binarization filters, which are aimed to find binarization
threshold automatically and then apply it to the source image.

Below is the list of implemented adaptive binarization filters and the result of their application to the below source
image.

Source image:

Otsu thresholding

Calculated threshold is 97.

Iterative thresholding

Calculated threshold is 102.

SIS thresholding

Calculated threshold is 127.