This flag changes the threshold algorithm used to create the black/white image.
Note: This flag is used instead of the Gray2Mono=1 flag in the [ImageFilter] section of eiglobal.ini starting with INVOICES 5-7 Patch 4.
0 - Local contrast (Bernsen)
1 - Iterative selection (default)
2 - Iterative selection without bin 0
3 - Local adaptive thresholding (Niblack)
4 - Otsu method
5 - A combination of 0 and 1
6 - A combination of 1 and 3
7 - Simplified image statistics (recommended for PDF files)