Hand Held Products 2020 User Manual page 181

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 correction yields an overall brighter image. The lower the setting,
the darker the image. The optimal setting for text images is 50K.
0K Gamma correction off (default)
50K Apply gamma correction for brightening typical document image
n K Apply gamma correction factor n ( n = 0-1,000)
Example of Gamma
Correction set to 0K:
L, R, T, B, M - Image Cropping
Note: Image Cropping should not be used with
page 8-6).
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.
n L The left edge of the shipped image corresponds to column n of
the image in memory. Range: 000 - 640. (Default = 0)
n R The right edge of the shipped image corresponds to column n - 1
of the image in memory. Range: 000 - 640. (Default = all
columns)
n T The top edge of the shipped image corresponds to row n of the
image in memory. Range: 000 - 480. (Default = 0)
2020/4820/4820 i User's Guide
Example of Gamma
Correction set to 50K:
Example of Gamma
Correction set to 255K:
IMGSHP Modifiers (see
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