Available image transformations (rotation and/or mirroring).

Values:

IG_REC_IMG_ROTATE_AUTO	Automatic image rotation (Default).
IG_REC_IMG_ROTATE_NO	Do not transform the image.
IG_REC_IMG_ROTATE_RIGHT	Rotate image to the right (clockwise).
IG_REC_IMG_ROTATE_DOWN	Rotate image down (rotate twice).
IG_REC_IMG_ROTATE_LEFT	Rotate image to the left (anti-clockwise).
IG_REC_IMG_ROTATE_FLIPPED	Mirror image without rotation (mirrored around the Y-axis).
IG_REC_IMG_ROTATE_RIGHT_FLIPPED	Mirror image, then rotate to the right.
IG_REC_IMG_ROTATE_DOWN_FLIPPED	Mirror image, then rotate twice.
IG_REC_IMG_ROTATE_LEFT_FLIPPED	Mirror image, then rotate to the left.

Remarks:

Rotation is always carried out in 90-degree steps. The following table shows the results of the image transformation using different values.

Original image:

• 123
• 456
• 789

Transformed image:

NO:	LEFT:	RIGHT:	DOWN:
123	369	741	987
456	258	852	654
789	147	963	321
FLIPPED:	LEFT_FLIPPED:	RIGHT_FLIPPED:	DOWN_FLIPPED:
321	147	963	789
654	258	852	456
987	369	741	123

Automatic image rotation settings (IG_REC_IMG_ROTATE_AUTO) can only be used with good quality machine-printed texts, but not with images containing 9-pin dot-matrix text or other non-machine printed text. Mirroring values (those with the suffix FLIPPED) are ignored during image pre-processing IG_REC_image_preprocess. They are available only through IG_REC_image_orient.