6. Final Adjustment and Configuration
Barco – OverView cDG67-DL – R5976624– installation manual – Revision 03 – August-2005
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6-17
6.6.4.3
Degamma
Use
Service | Color/Brightness | Degamma
to change the gamma value.
A list of the available gamma values pop up. The current setting is indicated by a white dot.
Figure 6-20
list of available gamma values
Disable applies a gamma value of “1”
For OverView D series, do NOT use any of the TI gamma values.
gamma = 2.7 should be used with utmost care!
Influence of White Peaking on Gamma
For DLP projection engines which use the white segment and spoke light recapture, the influence of the gamma
value on white and on gray levels is much higher. The primary colors and secondary colors are not affected. The
following table shows the selected gamma value and its effective equivalent:
gamma value (White Peaking value = 0)
effective gamma value (White Peaking value = 10)
1.0
1.6
2.0
3.2
2.2
3.4
2.3
3.6
2.7
4.0
Due to the White Peaking, for white and gray (R=G=B) even a gamma value of “1”
(disabled) results in a non-linear effective gamma curve and thus in a non-linear
response.
