Film-Tech Forum ARCHIVE: RealD EQ Ghost Busting

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Posted by Adrian Hauser (Member # 4723) on 06-03-2010, 12:42 AM:

Hi Film Tech,
Im curious to know what you folks think of the Server based RealD EQ ghost busting system in comparison to projecting Pre Software Ghostbusted DCP's.

Ive seen a few supposed Server based Real Time Ghost busting projections and didnt think it seemed that good, at least not compared to the software versions.

In one screening it seemed to Ghost bust only one eye. This didnt make sense to me but I was assured by staff that the system was fully operational.

What are your thoughts on this.

Many thanks ,

Adrian

Posted by Joe Elliott (Member # 4006) on 06-03-2010, 08:48 AM:

I can say for our system (Barco DP-100, Doremi) I compared up NGB with EQ and GB with the EQ off, and although I did not see any glaring difference, I did still see a very slight ghosting using the real time EQ. It may have also just been me, as I would expect to see more ghosting, so therefore, I would be more critical of the NGB image. But again using several previews, I did not see any huge difference.

Posted by Steve Guttag (Member # 268) on 06-03-2010, 09:46 AM:

I have definitely seen ghosting on a real time system...that said, it must be qualified that we were WAY over light spec. What should have been a Real-D Z-screen was delivered as a Real-D XL and we had nearly double the light...I couldn't get it below 12fL...even with the lamp all of the way down.

Thus, this is going to reveal more artifacts. This was with a DSS200 server on a Severtson screen.

Steve

Posted by Kris Verhanneman (Member # 5562) on 06-05-2010, 07:10 AM:

I've heard RealD changes from passive glasses to active glasses.
Can somebody confirm?

Posted by Marco Giustini (Member # 4544) on 06-05-2010, 04:42 PM:

Unlikely, the system works with polarized light, as fas as I know there is not better "active" polarizers.

I may be mistaken but I think I heard that the ghostbusting process works leaving alone one of the eyes and adding a sligltly inverted pictures over the other eye. I dunno whether it's the same procedure for both post-production and real-time servers.

Steve
First time I hear someone complaining for too much light on 3D [Smile]

Posted by Adrian Hauser (Member # 4723) on 06-08-2010, 07:11 AM:

The process is similar for Software processing and RT server based processing although in Software you had a little more control over the amount of cross talk correction. The EQ system. although labelled as 'dynamic', I believe works less on fixing such ghosting artifacts. Animation does not really get too much ghosting artifacts as the scenes them selves are kind of high dynamic range and its rare you get a very high contrast vertical edge that causes such visible artifacts. Live action 3D on the other hand in exterior conditions can show these effects quite crudely.

After viewing some of the screens around here it also became apparent that some of the 3D projectors had not been color aligned correctly. Making sure that both projected eyes are matching in XYZ color coordinates seems critical as it will have the effect of the ghosting appearing in one eye more than the other if it is out.

In the Barco Dolby3D system we have here one has to measure the color primaries of each eye (through the glasses optics) and place those values into the Barco software for it too balance the eyes correctly. Only then does the antiGhosting appear the best.

Posted by Todd McCracken (Member # 4718) on 06-10-2010, 01:35 PM:

Has anyone heard a set date when RealD intends to switch over to server based ghostbusting?

Posted by Joe Elliott (Member # 4006) on 06-10-2010, 04:19 PM:

It's already here, Shrek is supposed to be the first title available only in non-ghostbusted. Can't get the link to work right from a previous post, but here is the letter we recieved.

-------------------------------------------------------------------
RealD Exhibitor Partner,

It is time to turn on your ghostbuster. Let me explain...

RealD introduced cinema ghostbusting five years ago to enhance 3D cinema presentations by reducing the amount of 'ghosting' or crosstalk between the left and right eye images - a scenario found in all 3D projection systems.

Until now, RealD ghostbusting has been applied to content during the mastering process. Cinema operators with RealD Cinema Systems received ghostbusted masters for use in their theatres. Now, RealD is enabling ghostbusting through its RealD 3D EQ technology as a real-time feature in digital cinema servers and projectors worldwide. The ghostbusting process will be applied to the content as it is presented to the projector during playback.

RealD's exhibitor partners worldwide should begin upgrading their systems with RealD 3D EQ and enable this feature when they conclude the run of 'Avatar.' 'Avatar' will be the last digital 3D release to be distributed with a RealD ghostbusted master.

The best time to do the upgrade will be during the runs of 'Alice in Wonderland,' from Disney, and of 'How to Train Your Dragon,' from Paramount. These movies do not have ghostbusted masters available but they are being mastered by the studio to work with or without the RealD 3D EQ system on your server. While it is perfectly safe to upgrade your system during the run of a movie, this is not an urgent upgrade. RealD recommends implementing this feature according to your normal software upgrade procedures.

RealD 3D EQ is intended to run whenever a 3D movie is playing. Once RealD 3D EQ is enabled in the server, that theatre should no longer run any masters that have been pre-ghostbusted.

RealD 3D EQ ghostbusting is available now on Doremi, Dolby, and Qube servers as well as in the Sony 4K projector. Click on this link to access our web page where you can download the specific instructions for these platforms.

http://www.reald.com/3deqinstructions

Other servers will be offering the ghostbusting feature soon. Please check this link periodically for updates.

Questions or problems can be sent to cinema-support@reald.com.

Thanks for your continued support of RealD Cinema Systems.

Best Regards,

Rod Archer | Vice President of Cinema Products
REAL D
5335 Sterling Drive
Boulder, CO 80301
http://www.reald.com
-------------------------------------------------------------------

Posted by Demetris Thoupis (Member # 833) on 06-11-2010, 04:07 AM:

quote: Adrian Hauser
In the Barco Dolby3D system we have here one has to measure the color primaries of each eye (through the glasses optics) and place those values into the Barco software for it too balance the eyes correctly. Only then does the antiGhosting appear the best.

And so you should. Dolby requires the colour correction due to the Infitek system tricking the light spectrum in more simple words. Dolby is the only system out there which requires to balance the colours evenly and what it does it actually brings the strong eye to the lesser eye because it cannot boost. The result when correctly callibrated is better than other systems. X-Pand though beats in brightness.
Demetris

Posted by Steve Guttag (Member # 268) on 06-11-2010, 05:30 AM:

Your Barco has the ability to input colors for each eye? Really? Is it a DCinema machine? Normally, one enters the colors into the DCinema player (that is Dolby 3D compatible).

Steve

Posted by Adrian Hauser (Member # 4723) on 06-11-2010, 06:16 AM:

Steve you are correct.
My mistake. The XYZ primary color coordinates are keyed into the Server. We dont have a DCP server/player as we are grading in a post production environment so instead I put the color correction matrix over the output of each eye on our Baselight Color Grading Hardware.

Adrian

Posted by Demetris Thoupis (Member # 833) on 06-11-2010, 06:17 AM:

Steve is correct. It's the server you input. Guess rushed to answer. But in the Barco you sync the filter wheel via their communicator software (considering is not a DP3000 which uses the standard Dolby 3D Package)
Demetris

Posted by System Notices (Member # 2357) on 12-01-2017, 12:27 PM:

It has been 2730 days since the last post.