C2-2450A O
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ANUAL
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The “Apply to all” button will apply the current settings to all the units in the system.
13.8 Gamma and Black Level Adjustments
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 for each of the outputs in the system. You will need
to adjust both output channels gamma correction to be the same, unless you have
non-matching projectors.
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.
Figure 10 Blend Gamma Curve Adjustment
The application will show Left, Right adjustment, Top, Bottom Adjustment or both
depending on the system configuration.
The ‘Apply to All’ button will cause the same Gamma value to be applied to all the
units in the system.
13.9
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.
The compensation is needed because most projectors cannot output pure black –
there’s always some light ‘leaking’ to the projection screen. Thus when you’re
trying to output black, there will be a ‘hot area’ where the two projectors are now
overlapping, of twice the projector’s ‘black level’ output.
