Method OtsuBinarize
OtsuBinarize()
Converts the image to a binary (bitonal) representation using global Otsu thresholding.
public ImageBuffer OtsuBinarize()Returns
- ImageBuffer
A new ImageBuffer in BINARY1 format where foreground pixels are 0 (black) and background pixels are 1 (white).
Remarks
Computes the optimal binarization threshold by maximizing inter-class variance (Otsu's method) over the full image histogram, then applies it to produce a clean two-level output: foreground pixels become 0 (black) and background pixels become 255 (white).
This is a fast, single-pass global threshold suitable for documents with uniform lighting. For documents with uneven illumination, shadows, or mixed backgrounds, prefer SmartBinarize() which applies adaptive, block-level thresholding.
Exceptions
- ObjectDisposedException
Thrown if this instance has been disposed.