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» Film-Tech Forum ARCHIVE   » Operations   » Digital Cinema Forum   » Fix ghosting on MasterImage or RealD (Page 2)

 
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Author Topic: Fix ghosting on MasterImage or RealD
Marco Giustini
Film God

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


 - posted 03-26-2016 04:46 AM      Profile for Marco Giustini   Email Marco Giustini   Send New Private Message       Edit/Delete Post 
Can you disable one eye and check on the affected scenes?

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Justin Hamaker
Film God

Posts: 2253
From: Lakeport, CA USA
Registered: Jan 2004


 - posted 03-26-2016 01:31 PM      Profile for Justin Hamaker   Author's Homepage   Email Justin Hamaker   Send New Private Message       Edit/Delete Post 
Jorge, I have noticed it a a number of different points in the show. I did another cleaning of the port window and filter disk just to be safe, and saw now improvement.

quote: Dave Macaulay
Does the wheel seem to when viewed from the lens sidestand still with 3D image showing? If it seems to twitch around a lot the motor drive could be failing, it should lock quite firmly to the sync signal.
The image looks nice and stable on the filter disk when viewed from the projector side.

Given that I'm hearing similar complaints from other theatres, I'm resigned to the fact it's in the movie, not our equipment.

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Marcel Birgelen
Film God

Posts: 3357
From: Maastricht, Limburg, Netherlands
Registered: Feb 2012


 - posted 03-26-2016 03:35 PM      Profile for Marcel Birgelen   Email Marcel Birgelen   Send New Private Message       Edit/Delete Post 
quote: Justin Hamaker
The server is GDC SX-2001 Non-IMB.
I'm not sure if those servers enable ghostbusting in combination with MasterImage, but your RealD screens should do ghostbusting in any case.

I've seen about 20 minutes using a RealD XL setup, a DP4K-23B and a Dolby DSS220 and there was quite a lot of ghosting. This ghosting wasn't due to bad calibration, but due to limitations in the polarizer technology. The contrast was just to great to entirely avoid it. It was somewhat reduced when I tried my Polaroid glasses instead of the stock RealD glasses.

I guess they would've done people a favor and release it as a 2D-only feature, this content just isn't a fit for most 3D screens out there...

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Carsten Kurz
Film God

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


 - posted 03-28-2016 10:58 AM      Profile for Carsten Kurz   Email Carsten Kurz   Send New Private Message       Edit/Delete Post 
Apparently same in Germany, and here also most prominent with Real Systems. Some people mention some double contours even when playing the 3D DCP in 2D. Looks like a serious flaw with the mastering or 3D conversion?!

Warner germany has admitted the issue, but only solution so far is to play the movie in 2D only on affected systems.

Many movies show some ghosting on RealD systems, especially with a bad combination of screen and portglas. But this one really triggers a lot of loud complaints from the audience it seems.

First sightings of the IMAX 3D version seem to suggest excellent 3D...weird...
Maybe a strange interference with RealDs server-side ghostbusting?

- Carsten

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Marcel Birgelen
Film God

Posts: 3357
From: Maastricht, Limburg, Netherlands
Registered: Feb 2012


 - posted 03-28-2016 05:07 PM      Profile for Marcel Birgelen   Email Marcel Birgelen   Send New Private Message       Edit/Delete Post 
I've seen it in full tonight in Dolby 3D and the 3D is definitely defective.

I haven't seen any form of "ghosting", but in several scenes, your brain doesn't seem to be able to correctly fuse the images in the background together. It's like the parallax of some of the objects is wrong or totally out of whack between the left and right image. Maybe this, combined with rampant ghosting issues in polarized systems explain the many complains.

Some people gave this movie positive reviews regarding the 3D qualities, I must have missed something.

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Marco Giustini
Film God

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


 - posted 03-28-2016 05:29 PM      Profile for Marco Giustini   Email Marco Giustini   Send New Private Message       Edit/Delete Post 
sounds like the 3D "clashed", where objects which belong to the foreground are put in the background by the parallax. Your brain cannot understand - because that cannot exist - and the picture kind of breaks down.

Like showing 2D subs on 3D picture, text cannot be behind objects so your brain basically farts. [Smile]

It makes sense to me that the average customer/projectionist may identify that as 'ghosting'.

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Carsten Kurz
Film God

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From: Cologne, NRW, Germany
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 - posted 03-29-2016 04:49 AM      Profile for Carsten Kurz   Email Carsten Kurz   Send New Private Message       Edit/Delete Post 
A colleague quoted a letter from RealD acknowledging the issue, asking for more reports, and saying that they are working with Warner to solve the issue.

- Carsten

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Carsten Kurz
Film God

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


 - posted 03-31-2016 06:38 AM      Profile for Carsten Kurz   Email Carsten Kurz   Send New Private Message       Edit/Delete Post 
Someone suggested it could actually be L/R frames out of sync.

At least that's an explanation how it could have happened somewhere in the mastering process. It doesn't explain why it seems to be more visible on Real D screens. But maybe that is because with out of sync 3D material, the Real D Ghostbusting will cause very weird effects.

Enough people have commented on bad 3D with Dolby 3D and IMAX 3D as well, so this clearly is not a Real D only issue (I would have a hard time to imagine any reason for any Real D only issues - other than their lower stereo separation and ghostbusting).

- Carsten

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Marco Giustini
Film God

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


 - posted 04-01-2016 02:31 PM      Profile for Marco Giustini   Email Marco Giustini   Send New Private Message       Edit/Delete Post 
What puzzles me is that WB is not saying anything. What are they waiting for?

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Carsten Kurz
Film God

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From: Cologne, NRW, Germany
Registered: Aug 2009


 - posted 04-01-2016 03:48 PM      Profile for Carsten Kurz   Email Carsten Kurz   Send New Private Message       Edit/Delete Post 
Maybe it's sheer embarrassment...

- Carsten

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Marcel Birgelen
Film God

Posts: 3357
From: Maastricht, Limburg, Netherlands
Registered: Feb 2012


 - posted 04-04-2016 04:38 PM      Profile for Marcel Birgelen   Email Marcel Birgelen   Send New Private Message       Edit/Delete Post 
quote: Carsten Kurz
Someone suggested it could actually be L/R frames out of sync.
Out of sync as in reversed? Which could explain the weird parallax issues I've seen now and then.

quote: Marco Giustini
What puzzles me is that WB is not saying anything. What are they waiting for?
As long as it doesn't hit a major news outlet, they will probably say nothing at all.

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