H - histogram stretch, I - invert image – Honeywell Granit 1991iSR Ultra-Rugged Standard-Range Barcode Scanner User Manual
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Granit XP User Guide
H - Histogram Stretch
Increases the contrast of the transmitted image. Not available with some image
formats.
0H
No stretch
(default)
1H
Histogram stretch
Example:
I - Invert Image
Invert image is used to rotate the image around the X or Y axis.
1ix
Invert around the X axis (flips picture upside down)
1iy
Invert around the Y axis (flips picture left to right)
Example:
Histogram Stretch at 0H:
Histogram Stretch at 1H:
Image with Invert
Image set to 1ix:
Image not inverted:
Image with Invert
Image set to 1iy: