Honeywell 8680i User Manual page 179

K - Gamma Correction
Gamma measures the brightness of midtone values produced by the image. You
can brighten or darken an image using gamma correction. A higher gamma correc-
tion yields an overall brighter image. The lower the setting, the darker the image.
The optimal setting for text images is 50K.
Example:
L, R, T, B, M - Image Cropping
Ships a window of the image by specifying the left, right, top, and bottom pixel
coordinates. Device columns are numbered 0 through 1279, and device rows are
numbered 0 through 959.
8680i User Guide
0K Gamma correction off (default)
50K Apply gamma correction for brightening typical document image
nK Apply gamma correction factor n (n = 0-1,000)
Gamma Correction set
to 0K:
nL The left edge of the shipped image corresponds to column n of the image
in memory. Range: 000 - 843. (Default = 0)
nR The right edge of the shipped image corresponds to column n - 1 of the
image in memory. Range: 000 - 843. (Default = all columns)
nT The top edge of the shipped image corresponds to row n of the image in
memory. Range: 000 - 639. (Default = 0)
Gamma Correction set
to 50K:
Gamma Correction set
to 255K:
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