Represents the image file format types
Represents the available languages
Represents ocr engine mode
enum of the elements of the page hierarchy, used in ResultIterator to provide functions that operate on each level without having to have 5x as many functions.
Represents the possible modes for page layout analysis.
Represents paragraph justification
Possible types for a POLY_BLOCK or ColPartition.
Represents the text lines are read in the given sequence.
The grapheme clusters within a line of text are laid out logically in this direction, judged when looking at the text line rotated so that its Orientation is "page up". For English text, the writing direction is left-to-right. For the Chinese text in the above example, the writing direction is top-to-bottom.