Lookup Tables - AGFA QCR-Z Operator's Manual

Addendum

Lookup Tables

The film's GAMMA response must be compensated in order to produce a
linear image on film. The eight bit data for one image line enters the QCR-Z
and is stored in its static RAM memory. When the data is read from the
RAM, it is sent to the lookup table RAM chips where the eight bit data is
color corrected, expanded into a 12 bit output, and converted to an analog
voltage.
Figure A-4. Lookup Table Compensation
5-7 QCR-Z Operator's Guide Version 4