Canon CXDI-40G COMPACT, Service Manual

Page: 116 / 189

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12.12 Operation Unit Gamma Correction
1) Purpose
This procedure is performed so that the image that is printed out or displayed on a high-
definition monitor conforms exactly to the exposure image on the operation unit.
2) Notes
2-1) The procedure in “Linearity Check of Transfer Image Density” must be completed.
2-2) If image adjustment for the printer or high-definition monitor has not been made, use
the “Gamma Correction Calculation Tool” in order to correct the gamma of high
definition monitor image to be a same as printer image.
2-3) Gamma correction is an image correction process for monitors and film. It is different
from the contrast setting or grayscale setting.
This procedure is simply a visual adjustment. As a result, differences may occur
depending on the operator performing the procedure. Therefore, be sure to consult
with the responsible technician before performing this adjustment.
2-4) To make the gamma of operation unit adjust in detail, use the “Gamma Correction
Calculation Tool”.
3) Comparison of operation unit image and print image or monitor image.
3-1) Start up the CXDI system.
3-2) Use the two adjustment knobs at the rear of the operation unit to adjust the brightness
and contrast of the touch panel screen for optimum visibility.
3-3) On the exposure screen, select the exposure mode “SMPTE” and wait until “READY”
appears. [Fig. 1].
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