FUJITSU M3097G - Manual (Page 68)

(f) Brightness: Byte 16
Specifies the brightness for halftone (Byte 19=X©01π) output.
Value (Hex) Brightness
00 Default: same as value X©80π.
01
80
FF
Brightest
Normal
Darkest
(g) Threshold: Byte 17
Specifies the threshold value for the line art (Byte 19=X©00π).
Value (Hex) Threshold
00 Default:
f
without IPCII option
-
Same as value X©80π.
f with IPCII option
-
Dynamic threshold, or simplified
dynamic threshold
01
80
FF
Brightest
Normal
Darker
(h) Contrast: Byte 18
Specifies the contrast value for the line art or the halftone.
Value (Hex) Contrast
00 Default: same as value X©80π.
01
80
FF
Mostly soft
Normal
Mostly sharp
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