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Author Topic: Color channels not aligned during projection
Eugene Lehnert
Film Handler

Posts: 11
From: New York, NY
Registered: Jul 2012


 - posted 03-15-2013 03:31 PM      Profile for Eugene Lehnert   Author's Homepage   Email Eugene Lehnert   Send New Private Message       Edit/Delete Post 
Hello-

I have a Barco DP90 projecting in the XYZ colorspace from a Dolby DSS200 server. The channels seems to be slightly misaligned. When white text on appears on a black background you can see green on the left edge and red on the right edge.

Has anyone had this problem?

Thanks,

Eugene

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Gavin Lewarne
Master Film Handler

Posts: 278
From: Plymouth, UK
Registered: Aug 2009


 - posted 03-15-2013 04:16 PM      Profile for Gavin Lewarne   Email Gavin Lewarne   Send New Private Message       Edit/Delete Post 
sound like you need to get a service tech out to adjust the convergence in the projector.

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Eugene Lehnert
Film Handler

Posts: 11
From: New York, NY
Registered: Jul 2012


 - posted 03-15-2013 04:41 PM      Profile for Eugene Lehnert   Author's Homepage   Email Eugene Lehnert   Send New Private Message       Edit/Delete Post 
This does not happen in other color spaces though. This only happens in XYZ and not Rec709 or P3. Do different color spaces need different convergence settings?

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Marco Giustini
Film God

Posts: 2713
From: Reading, UK
Registered: Nov 2007


 - posted 03-16-2013 04:07 AM      Profile for Marco Giustini   Email Marco Giustini   Send New Private Message       Edit/Delete Post 
Not really.
Try a test pattern from the projector to check the convergence.
I cannot think of a setting in a Barco that can affect convergence to be honest. Maybe your picture is rescaled? Scaling a picture down will create some sort of artefacts, maybe you are mistaking them for convergence issue.
Select the affected macro, then using the communicator go to SCREEN and load a default 2048x1080 no crop screen file (don't save the macro). That would temporarily disable the scaling, assuming there is one set.
Scaling affects test patterns as well.

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