This enumeration determines the barcode's orientation on the scanned image.

Values:

IG_TW_BCOR_ROT0	Normal reading orientation.
IG_TW_BCOR_ROT180	Rotated 180 degrees clockwise.
IG_TW_BCOR_ROT270	Rotated 270 degrees clockwise.
IG_TW_BCOR_ROT90	Rotated 90 degrees clockwise.
IG_TW_BCOR_ROTX	The orientation is not known.