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Document Reader Imaging Guide 1 - 3
G - Gain
Gain is used in Manual Style only (2P). Like a volume control, the gain modifier boosts the signal and multiplies the pixel
value. As you increase the gain, the noise in an image is also amplified.
1G No gain (default)
2G Medium gain
4G Heavy gain
8G Maximum gain
W - Target White Value
Sets the target for the median grayscale value in the captured image. For capturing close-up images of high contrast
documents, a lower setting, such as 75, is recommended. Higher settings result in longer exposure times and brighter
images, but if the setting is too high, the image may be overexposed. Target White Value is only available when using Photo
Style (1P). (Default = 125)
nW Range: 0 - 255
D - Delta for Acceptance
This sets the allowable range for the white value setting (see W - Target White Value). Delta is only available when using
Photo Style (1P). (Default = 25)
nD Range: 0 - 255
U - Update Tries
This sets the maximum number of frames the document reader should take to reach the D - Delta for Acceptance. Update
Tries is only available when using Photo Style (1P). (Default = 6)
nU Range: 0 - 10
Example of Gain at 1G: Example of Gain at 4G: Example of Gain at 8G:
Example of White
Value at 75W:
Example of White
Value at 125W:
Example of White
Value at 200W: