User's Guide

HH1800 User Guide 155
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
50K
nK
Gamma correction off (default)
Apply gamma correction for brightening typical document image
Apply gamma correction factor n (n = 0-1,000)
Example:
Gamma Correction set to 0K:
Gamma Correction set to 50K:
Gamma Correction set to 255K:
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.
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)
nB
The bottom edge of the shipped image corresponds to row n - 1 of the image in
memory. Range: 000 - 639. (Default = all rows)
Example:
Uncropped Image:
Image Crop set to 300R:
Image Crop set to 300L:
Image Crop set to 200B:
Image Crop set to 200T: