Film-Tech Cinema Systems
Film-Tech Forum ARCHIVE


  
my profile | my password | search | faq & rules | forum home
  next oldest topic   next newest topic
» Film-Tech Forum ARCHIVE   » Operations   » Digital Cinema Forum   » Real-D ghosting

   
Author Topic: Real-D ghosting
Thomas Pitt
Master Film Handler

Posts: 266
From: Leeds, West Yorkshire, UK
Registered: May 2007


 - posted 12-25-2010 06:43 PM      Profile for Thomas Pitt   Email Thomas Pitt   Send New Private Message       Edit/Delete Post 
The last few times I have been to the Bradford Cineworld to see a 3D movie, there was ghosting between the left and right eyes - particularly on high contrast scenes such as white text on a black background. Wasn't quite enough to spoil the 3D effect, but it was noticeable during the film.

This ghosting effect happens both in their Delux screen and in the other auditorium they have upgraded for Real-D. I've never seen ghosting this bad in other Real-D installations, and it's odd that the ghosting occurs on both screens in the same way.

Anyone have any ideas what would cause noticeable 'ghosting' on Real-D movies, and what would cause the same effect to be duplicated across two screens?
Screen not 100% reflective? Defective glasses? Projector lag?

 |  IP: Logged

David Zylstra
Master Film Handler

Posts: 432
From: Novi, MI, USA
Registered: Mar 2007


 - posted 12-25-2010 08:46 PM      Profile for David Zylstra   Email David Zylstra   Send New Private Message       Edit/Delete Post 
On our series 1 machines there was some tweaks the service company and RealD came up with to reduce ghosting - there was a marked difference before and after, the ghosting was originally more pronounced on one eye (if my memory is correct - it has been 2 years since they tweaked it).

It is also possible they are showing a non-ghost busted copy and/or do not have ghost busting turned on in their servers.

 |  IP: Logged

Robert D Hall
Film Handler

Posts: 65
From: Abingdon V.A USA
Registered: Mar 2010


 - posted 12-25-2010 09:32 PM      Profile for Robert D Hall   Author's Homepage   Email Robert D Hall   Send New Private Message       Edit/Delete Post 
I would bet that there sever has not been setup for ghost busting or is not turnd on like david said. When we first started getting non-ghost busted prints our Dolby sever had to be setup the do the ghost busting.

 |  IP: Logged

Carsten Kurz
Film God

Posts: 4340
From: Cologne, NRW, Germany
Registered: Aug 2009


 - posted 12-30-2010 06:31 AM      Profile for Carsten Kurz   Email Carsten Kurz   Send New Private Message       Edit/Delete Post 
With polarizing 3D systems, it's always a combination of issues - polarization efficiency of Z-Screen, screenquality , glases, seating, and Z-Screen settings.

On a typical Real-D installation, glases and screen are fixed issues (unless you have a very bad screen and opt to replace it). The Z-Screen switches light polarity dynamically - and you can adjust the timing for this device to optimize ghosting.

Another issue is that until the End of 2009, special Real-D releases were available which had special 'Ghost-Busting' mastering applied. Now all servers have an option for internal realtime GhostBusting, available through a firmware update, so DCPs in general have no ghostbusting applied in the mastering. The operators should check wether the server firmware is up-to-date and wether the RealD-EQ has been activated to do real-time ghostbusting.

You can not solve all ghosting issues with these measures, but it seems you can get RealD to an acceptable level - unless you have a really bad silver screen.

- Carsten

 |  IP: Logged



All times are Central (GMT -6:00)  
   Close Topic    Move Topic    Delete Topic    next oldest topic   next newest topic
 - Printer-friendly view of this topic
Hop To:



Powered by Infopop Corporation
UBB.classicTM 6.3.1.2

The Film-Tech Forums are designed for various members related to the cinema industry to express their opinions, viewpoints and testimonials on various products, services and events based upon speculation, personal knowledge and factual information through use, therefore all views represented here allow no liability upon the publishers of this web site and the owners of said views assume no liability for any ill will resulting from these postings. The posts made here are for educational as well as entertainment purposes and as such anyone viewing this portion of the website must accept these views as statements of the author of that opinion and agrees to release the authors from any and all liability.

© 1999-2020 Film-Tech Cinema Systems, LLC. All rights reserved.