Operator Instructions
RECORDING INTERNAL TEST PATTERNS
The QCR-Z provides internal test and diagnostic functions which allow you to
expose a test image onto film and determine whether or not the system is
working properly. You should image the internal test pattern only after you turn
the QCR-Z on, and allow the system to warm up for at least twenty minutes.
Upon power up the QCR-Z does the following:
• It loads internal default brightness tables and the corresponding color
look-up tables for each of the red, green and blue scans.
• It looks at the type of camera module that is installed, and determines the
proper image size for the test pattern that you will expose onto the film. The
QCR-Z will image the test patterns in the 2K mode for the M35 and M120
modules, and in the 4K mode for the M240 module.
• It calibrates to the brightness values stored in its internal look-up tables.
IMPORTANT
The QCR-Z must not be actively controlled by the host computer during the
time that you are recording internal test patterns. Externally loaded look-up
tables may cause an imbalance in the colors on the internal test patterns.
This is why you image the internal test patterns after a power on and
warmup cycle. As an added precaution, you may disconnect the IEEE-488
interface connector from the back of the QCR-Z, and reset the film recorder
prior to running internal test patterns.
Test Pattern Descriptions
The QCR-Z can generate two different test patterns in the local mode. These
patterns are illustrated in Figure 4-12.
Test pattern 0 verifies focus, geometric and radiometric registration, color
registration, and color balance. It appears as a set of sixteen horizontal bars,
four each of the three colors, and four in neutral. In each color area, three
color bars contain alternating smaller bars of colored and dark pixels, and the
other bar shows a scale of color intensity.
Test pattern 1 verifies linearity, focus, density, and color registration. It appears
as a uniform field of neutral color, sixteen pixel squares on a dark background.
The neutral color squares in this image are produced from the combination of
the three color passes.
QCR-Z Operator's Guide Version 4 4-14
Содержание QCR-Z
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