Honeywell N3680 User Manual page 148

H - Histogram Stretch
Increases the contrast of the transmitted image. Not available with some image
formats.
0H
1H
Example:
I - Invert Image
Invert image is used to rotate the image around the X or Y axis.
1ix
1iy
Example:
132
No stretch (default)
Histogram stretch
Histogram Stretch at 0H:
Invert around the X axis (flips picture upside down)
Invert around the Y axis (flips picture left to right)
Image not inverted:
Histogram Stretch at 1H:
Image with Invert
Image set to 1ix:
Image with Invert
Image set to 1iy:
N3680 Decoded Engine User Guide