Additional Flags
These flags were designed to improve the quality of the segmentation on idiosyncratic but very common classes of documents. They may be redundant with other options (e.g. high-variation-foreground) or trigger heuristics whose impact has not been evaluated on all types of documents (background-floss). Their systematic usage is not encouraged.
This flag is redundant when block-size=8.
Option type
Boolean
Default
False
Command
line
No
Expert
Normally, it is assumed that over a width of 16 pixels, the foreground color does not vary too much.
However, this is not true in the following cases:
Characters in the neighboring words have very different colors
A character is next to a vertical line of different color
Smooths the foreground and background layers to improve the overall appearance of the image. Using this option increases the time it takes to encode the image. Add refinements (such as interpolation heuristics) to foreground and background subsampling.
Option type
Boolean
Default
False
Command
line
Yes
Minimizes the blurring of text in a document by displaying background color in small intervals between adjacent characters. Generally causes larger files and less smooth background. Necessary when characters are thick (typically when upsampling).
Option type
Boolean
Default
False
Command
line
No