Specifications

C2-1000 SERIES OPERATION MANUAL
85
11.10 Gamma correction
By now you should have two perfectly aligned projectors, but possibly with a brighter
than normal overlap. This is most probably because a projector’s luminance is not
perfectly linear and therefore will need to have what’s called ‘gamma correction’
applied.
Gamma correction is available within the same ‘Adjust keyers’ menu as the other
adjustments. You will need to adjust both output channels gamma correction to be
the same, unless you have non-matching projectors.
To change gamma correction:
1. Go into the ‘Adjust keyers’ menu.
2. For Output 1 (1A), change ‘E.blnd gamma’ (the first number) until the brighter
area starts to dim – note the number required for this.
3. For Output 2 (2B), change ‘E.blnd gamma’ (the first number) to the same
gamma value as per above.
4. Repeat steps 2 and 3, changing up or down as necessary until the bright
patch has disappeared.
The 2
nd
number in the ‘E.blnd gamma’ is for where you have projectors stacked
vertically – e.g. for a 2x2 edge blend arrangement. The 1
st
number adjust the
horizontal blend’s gamma value, whereas the 2
nd
controls the vertical blend’s gamma
value.
Note that it may not be possible to completely remove a bright patch – this is
because some projectors can not actually output completely black images, with
some light always leaking through. However, the next adjustment is designed
specifically for this.
11.11 Brightness compensation
If you find it impossible to completely remove the centre overlap for all images (i.e.
dark images and bright images being projected), then two extra compensation
adjustments are provided to help with this.
Perfect
alignment – your
red and green
vertical lines
should overlap
to produce
yellow ones.
Y Y