Honeywell Granit 1991iSR Ultra-Rugged Standard-Range Barcode Scanner - Manual (Page 225)

Granit XP User Guide 209
IF- Noise Reduction
Used to reduce the salt and pepper noise in an image.
0if No salt and pepper noise reduction (default)
1if Salt and pepper noise reduction
Example:
IR - Image Rotate
0ir Image as snapped (rightside up) (default)
1ir Rotate image 90 degrees to the right
2ir Rotate image 180 degrees (upside down)
3ir Rotate image 90 degrees to the left
Example:
Noise Reduction On (1if): Noise Reduction Off (0if):
Image Rotate set to 0ir: Image Rotate set to 2ir:
Image Rotate set to 1ir: Image Rotate set to 3ir: