LUT customization is useful for scanning low contrast documents. It allows the small dynamic
range of a low contrast document to be expanded to full size.
----- POSITIVE LUT -----
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 04 08 0C 10 14 18 1C 20 24 28 2C 30 34 38 3C
40 44 48 4C 50 54 58 5C 60 64 68 6C 70 74 78 7C
80 84 88 8C 90 94 98 9C A0 A4 A8 AC B0 B4 B8 BC
C0 C4 C8 CC D0 D4 D8 DC E0 E4 E8 EC F0 F4 F8 FC
FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
Step Size = 4 Offset = 40H
Figure 5-16
Example of an Image Processor Board Look-Up Table (IP LUT)
The <P> command writes a positive LUT into the table. If the LUT has been customized, the
custom parameters are used to calculate the table values. If not, the default positive LUT is
used. ( Note that the default LUT is equivalent to a customized LUT with Step Size = 1 and
Offset = 0 . )
The <N> command writes a negative LUT into the table, also using custom parameters if set.
The <D> command writes either the default positive LUT or the default negative LUT into the
table, depending on which is currently selected ( as shown at top of screen.)
The <X> command returns to the Diagnostic Tests menu. Any changes you make in the table
will remain active when you exit to the Main Menu.
