This is topic "amelie" subtitles out of focus? in forum Film Handlers' Forum at Film-Tech Forum ARCHIVE.


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Posted by Brad Haven (Member # 954) on 12-18-2001, 05:31 AM:
 
On our print of "amelie" our subtitles appear out of focus, i can focus the subtitles sharp but then the film itself is too soft, so, i'm having to compromise and settle in between, which i'm not pleased about!.
i went to our other location screening "amelie" and they have the very same problem!.
is any one else having the same problem?.
i'm going to call the distributer tomorrow to let them know.
 
Posted by Dick Vaughan (Member # 540) on 12-18-2001, 05:56 AM:
 
Our print of Amelie copy number 0835 also had soft printed sub titles so it looks like it's probably a general thing. Sod's law dictates that the most popular foreign language titles have the worst subtitles.
 
Posted by Brad Haven (Member # 954) on 12-18-2001, 06:32 AM:
 
hi dick, thank's for your reply. i guess that not much will be acheived by notifiying the distributer, but i'll make sure that they are aware of the problem anyway. i had a customer come out and complain that i had it out of focus, so it's us that looks bad and not the people who printed it.

 
Posted by Charles Everett (Member # 889) on 12-18-2001, 07:15 AM:
 
US prints of Amelie have this problem to an extent. On the print running in the AMC Hamilton, R1-R3 have subtitles that are clear and sharp; R4-R7 have subtitles that are soft-focus.

In the US most subtitled pictures carry an ID for the subtitling lab in the end credits. Amelie, though, does not have such an ID.

Then again Miramax is too busy buying Oscar nominations to pay close attention. Not to mention the fact Amelie is losing box office juice because Miramax refuses to expand it beyond 221 theaters.
 


Posted by John Pytlak (Member # 331) on 12-18-2001, 08:01 AM:
 
There are several methods of making subtitles:

1. They can be optically or digitally printed, such that they are part of the duplicate negative used for release printing.

2. They can be "bi-pack" printed, where the subtitles are printed from a separate B&W negative "sandwiched" with the picture negative.

3. They can be "chemically etched" on the film, using a bleach solution controlled by a wax stencil coated on the processed print, and later removed.

4. Laser subtitles use a high powered laser to burn away the print film emulsion in the lettered area.

Method 1 usually produces sharp titles, since the subtitles are actually part of the image on the printing negative. Method 2 may be less sharp, since you are printing through two thicknesses of film. Methods 3 and 4 may focus differently, since the picture is contained within the emulsion, and the titles are bare film base.

------------------
John P. Pytlak, Senior Technical Specialist
Worldwide Technical Services, Entertainment Imaging
Research Labs, Building 69, Room 7525A
Rochester, New York, 14650-1922 USA
Tel: 716-477-5325 Cell: 716-781-4036 Fax: 716-722-7243
E-Mail: john.pytlak@kodak.com
Web site: http://www.kodak.com/go/motion
 


Posted by Gordon McLeod (Member # 33) on 12-18-2001, 08:55 AM:
 
Also some of the older subtitles were done with a vibrating needle machine that was connectd to a crude form of typsetter
Typically the etched style will always have focus problems
 
Posted by Tom Sauter (Member # 616) on 12-20-2001, 12:08 PM:
 
If you're lucky enough to have a good throw angle you can minimize this effect (the majority of films I screen are foreign and have laser subtitles). Our throw angle allows us to focus very nicely on center and the subtitles at the same time. I have also tilted the screen ever so slightly to improve on this.


 


Posted by Danny Hart (Member # 659) on 12-20-2001, 07:01 PM:
 
We had focus problems with this film, too. But I blame this on our head projectionist. He insists that every screen is as bright as possible, completely ignoring the standards. I actually find them annoyingly bright, to the point where watching for too long gives me a headache. When I turned them down, he turned them back up and I was told never to interfere with them again.

I fould the overall focus on Amelie was greatly improved when it moved to our hall with the lowest brightness - which is still above the standard (and as high as he can push it.) It was actually a great print and looked superb when shown in this way.

A bit off-topic, but I showed a subtitled film recently (can't remember what it was, but it wasn't a new film) and the subtitles had a major flaw - they were pure white text, which meant if there was, for example, a close-up of someone speaking who was wearing a white shirt, the subtitles disappeared into the shirt and couldn't be read. I would have thought a basic rule of subtitling would be white text with a black outline, which would make it visible on ANY background.
 


Posted by Joseph Pandolfi (Member # 223) on 12-21-2001, 07:27 AM:
 
We have one of the eariler releases (#43) and we have no problems with the subtitles. We have been running it now for about 6 weeks. I agree with Danny above me about the letters disappearing in the white areas.


 


Posted by Aaron Haney (Member # 747) on 12-23-2001, 07:12 AM:
 
Getting a little off-topic, but:
quote:
He insists that every screen is as bright as possible, completely ignoring the standards. I actually find them annoyingly bright, to the point where watching for too long gives me a headache.
Is that due to it being so bright that the 48Hz flicker becomes visible enough to cause eye strain? Maybe if all the projectors had triple-bladed shutters that wouldn't be a problem?
 
Posted by John Pytlak (Member # 331) on 12-27-2001, 01:20 PM:
 
Aaron Haney asked: "Is that due to it being so bright that the 48Hz flicker becomes visible enough to cause eye strain? Maybe if all the projectors had triple-bladed shutters that wouldn't be a problem?"

Yes, a three-blade shutter would raise the flicker rate to 72 interruptions per second, so flicker would be much less of an issue if the screen luminance was too high. But going above the 22 footlambert limit specified by standard SMPTE 196M will also change the appearance of the print from what was approved by the director and cinematographer --- highlights will be brighter, colors more saturated, and you may see details in the shadows that you were not meant to see:
http://www.kodak.com/US/en/motion/newsletters/reel/spring98/pointers.shtml
http://www.kodak.com/US/en/motion/newsletters/notes/march2000/pytlak.shtml

The bottom line: try to maintain a screen luminance close to 16 footlamberts, which is how the prints were intended to be shown.


------------------
John P. Pytlak, Senior Technical Specialist
Worldwide Technical Services, Entertainment Imaging
Research Labs, Building 69, Room 7525A
Rochester, New York, 14650-1922 USA
Tel: 716-477-5325 Cell: 716-781-4036 Fax: 716-722-7243
E-Mail: john.pytlak@kodak.com
Web site: http://www.kodak.com/go/motion
 


Posted by Frank Angel (Member # 248) on 12-28-2001, 06:59 AM:
 
Even though we encounter all the different subtitling methods that John mentioned, the etched ones are always the best in terms of their never being washing out no matter how white the image is. This is because even though an area in the image may indeed seem "white," the light is still passing through how ever little emulsion is still there; the laser or bleach burns away that layer and it will always be "whiter" than the whitest image made by the emulsion.

I used to think, "how nice, subtitles to get an easy, perfect focus." Doesn't quite work that way with the etched subtitles. I discovered that you can focus the subtitles and find the image soft. Obviously you want to focus the picture and let the subtitles fall where they may. How much of a disparity between the hard focal point of the image and that of the etched subtitles will depend on the depth-of-field of your optical system.

In a house with a short throw and large screen, the problem can be quite sever. Theatres with moderately sized screens and longer throws have a optical system that is more at the center of the optimum curve and will not experience these focus problem -- even warped film can be focused. These are the theatres where you can rack the focus knob back and forth and see practically no change because there is a steep depth-of-field -- the lens is focusing in front and in back of the exact point of the film. But in theatres where the depth-of-field is shallow, there is only ONE place where you get perfect focus....not a micro before it or behind it. With those systems, just the difference in the thickness of the emulsion is enough to kick the subtitles out of focus.

Danny hinted on something though -- the amount of light passing through the lens can affect depth-of-field; you can improve the depth-of-field by increasing the gross light output of the lamphouse and then irising down the lens opening, much like you increase the depth-of-field in a camera by stopping down the lens. I saw this done once to amazing effect. He was trying to compensate for a print with some serious warpage. He cut a circle out of piece of "black wrap" and put this on the casing of the rear end of the lens. He experimented with the size of the hole and after a lot of hit and miss, he was able to strike a balance between cutting back the light and increasing the depth-of-field so that the focus problem, while it didn't totally disappear on some of the really badly warped reels, it made a decided difference for most of the show.

What I could never understand is why they just don't print the subtitles in the wasted black area below the image. Seems to me that would eliminate a host of problems. You could use the printing method to make your subtitles rather than etching -- no focus problems, they would always be in focus because they are in the same emulsion position as the image....also, there wouldn't be any image movement distracting the eye while it's trying to read them -- just nice white text on a black background.

But then again, I also can't understand why they are subtitles to begin with. In a theatre the bottom of the screen is the most difficult to see. Why aren't they SUPERtitles -- put them at the top of the screen....again in the wasted black area. But that would be thinking a bit TOO far out of the box, eh?
 


Posted by Peter Berrett (Member # 672) on 12-30-2001, 07:39 PM:
 
Here in Australia our multicultural station (SBS) does a lot of subtitling.

Their policy is to put the subtitles in yellow which is much clearer to read. Films are shown on standard tv in their full aspect ratio thus leaving black bars top and bottom. SBS puts the subtitles in the lower black bar which makes for better enjoyment of the film.
I might as well click on this link

It is a bit galling that in this day of high technology, digital prints etc one still goes to a see a Teletota subtitled film and struggles to see the words because the white subtitles get lost in the background. Would it be so technologically difficult to develop a low cost projection system to display subtitles immediately below the picture frame? The system could read digitally encoded subtitles from the soundtrack or from some other encoding method. I think that this would significantly improve viewing pleasure of foreign films.

How many times have you struggled to read the subtitles on a foreign film because they blended in with the background?

cheers Peter



 


Posted by John Pytlak (Member # 331) on 12-30-2001, 08:20 PM:
 
Peter Berrett asked: "Would it be so technologically difficult to develop a low cost projection system to display subtitles immediately below the picture frame? The system could read digitally encoded subtitles from the soundtrack or from some other encoding method. I think that this would significantly improve viewing pleasure of foreign films."

DTS already has such a system!:
http://www.dtsonline.com/cinema/dts-css.html

------------------
John P. Pytlak, Senior Technical Specialist
Worldwide Technical Services, Entertainment Imaging
Research Labs, Building 69, Room 7525A
Rochester, New York, 14650-1922 USA
Tel: 716-477-5325 Cell: 716-781-4036 Fax: 716-722-7243
E-Mail: john.pytlak@kodak.com
Web site: http://www.kodak.com/go/motion
 


Posted by Frank Angel (Member # 248) on 12-31-2001, 04:39 AM:
 
Seems like Dolby Digital and also SDDS could easily be adapted to this concept -- since both have time-code, that could easily be output to a computer that would contain the subtitle information and the time-code would cue it to display at the appropriately time via video projection. All this stuff is not even proprietary -- odinary PCs and video projectors. The nice thing about locating the actual text off the physical print, is that you can project it anywhere....ABOVE the image, below it... or take a cue from the Met and the text could be sent to LED displays on the seat backs like the system they have for the opera "supertitles."

DTS sure is an impressive system with so many ancillary applications. I hear they have already designed the DTS code to fit in the 16mm soundtrack. Now there's an idea, 6 channel digital sound with only the cost of a 16mm print -- and it could be shipped on a single reel -- no print makeup. Would work fine in 75% of the shopping mall miniplexes where the screen size doesn't need anything more than 16mm.

Wasn't there a project a few years back trying to use 16mm for those small theatres? Using Eastman 25B projectors with some souped up light and cooling. Problem back then was the sound. Problem solved.
And a souped up 25B is a lot cheaper than a DLP and so would go that big hallelulia about DLPs saving print cost and print shipping. You could print and ship a LOT of 16mm features before you would out-run the cost of a DLP system!
 


Posted by System Notices (Member # 2357) on 11-15-2004, 10:35 AM:
 

It has been 1050 days since the last post.


 
Posted by Peter Mork (Member # 1336) on 11-15-2004, 10:35 AM:
 
Ran the follow-up to Amelie by Jean-Pierre Jeunet(A Very Long Engagement) yesterday. The laser subs were quite soft and distracting. I think there should be a ban on laser titles for scope prints (scope is less forgiving generally of teeny variations in the focus plane).

I'm gonna write Warner and put in my opinion. (I can't remember if US prints of Amelie had printed or etched titles.)
 
Posted by John Pytlak (Member # 331) on 11-15-2004, 10:44 AM:
 
Remember, for laser or chemical etched subtitles, the "image" of the subtitle is the base of the film, not within the emulsion carrying the picture. So the plane of focus could be up to about 15 micrometers different. Less of a problem with longer focal length lenses, or if you have the light, using an aperture stop within the lens for subtitled pictures.
 
Posted by Dominic Case (Member # 1830) on 11-15-2004, 08:51 PM:
 
quote: was the last to post
Would it be so technologically difficult to develop a low cost projection system to display subtitles immediately below the picture frame?
Dolby and DTS both already have such a system. Suppose they persuaded distributors not to order subtitled prints, but to ship a disk with the subtitles. (So in other words you couldn't screen foreign language films unless you bought the extra kit.) It would probably save the distributors a few dollars. So who is going to pay for the kit to attach to each projector? I smell the cyan tracks debate all over again! Let's not go there.
 
Posted by Steve Kraus (Member # 476) on 12-08-2004, 10:23 AM:
 
I've always wondered if the depth of focus issues regarding laser subtitles are affected not only by lens focal length but the throw as well. At my screening room I'm at 45mm for 1.85 and 70mm for Scope. But the throw is only 30'. I wonder if a theatre that is proportionally the same but with a longer throw and of course larger screen using the same lenses would have the same issues.

BTW, I have Very Long Engagement here again and this time the print has photographic subtitles. What a difference.
 
Posted by John Pytlak (Member # 331) on 12-08-2004, 11:13 AM:
 
You can always do the math: [Wink]

http://www.vanwalree.com/optics/dofderivation.html

quote:
Depth of focus
Fig. 3 shows the same scenario as the top sketch in Fig. 2, but with the light cone extended beyond the film. The depth of focus U is defined as the region in front of and behind the focal plane where the diameter of the light cone is smaller than the permissible circle of confusion C. For k=C, the depth of focus stretches over the orange colored area around the film plane.


http://www.trenholm.org/hmmerk/TIAOOFe.pdf

quote:
The INs and OUTs
of FOCUS
An Alternative Way to Estimate
Depth-of-Field and
Sharpness
in the Photographic Image
by
Harold M. Merklinger


 
Posted by Peter Mork (Member # 1336) on 12-08-2004, 12:43 PM:
 
quote: Steve Kraus
BTW, I have Very Long Engagement here again and this time the print has photographic subtitles. What a difference.
See? They listened to moi. Who's your daddy?
 
Posted by John Pytlak (Member # 331) on 12-08-2004, 01:42 PM:
 
Larger print runs are more likely to use photographic subtitles. Laser subtitles are usually more cost effective for smaller numbers of prints.
 
Posted by Peter Mork (Member # 1336) on 12-08-2004, 09:00 PM:
 
Killjoy!
 
Posted by Michael Schaffer (Member # 1204) on 12-09-2004, 02:19 AM:
 
I watched that movie recently in Hollywood at the Leammle Royal Theatre, and it had photogrpahic subtitles.
There was another interesting problem though, not caused by the subtitles (it was also obvious during the regular titles at the beginning and end, but not really in other elements of the picture - but it may have contributed to a certain diffuseness of the image): I would describe it as "horizontal streaking" for lack of a better term. You could see a blue "aura" on the left edge of the subtitles and titles. It seemed to be a little stronger towards the left side of the image. I vaguely remember we discussed a problem like this not too long ago, but I couldn't find the thread.
Is this caused by problems during printing or by misaligned lens elements?
 
Posted by Leo Enticknap (Member # 534) on 12-09-2004, 04:18 AM:
 
quote: Dominic Case
Dolby and DTS both already have such a system. Suppose they persuaded distributors not to order subtitled prints, but to ship a disk with the subtitles. (So in other words you couldn't screen foreign language films unless you bought the extra kit.) It would probably save the distributors a few dollars. So who is going to pay for the kit to attach to each projector? I smell the cyan tracks debate all over again! Let's not go there.
Dolby Screentalk has caught on in quite a big way here (the DTS system to a lesser extent), though AFAIK only for providing hard-of-hearing subtitles and synchronising audio commentaries for the blind and partially sighted. There is even a pressure group which campaigns for more of these screenings and helps venues raise funds to install the kit.

I'm not aware of either system ever having been used to provide the subtitles for unsubtitled foreign-language prints. Personally I can see a lot of potential advantages in going down that route. For a typical arthouse title the biggest cost is getting the translation done (I have a friend who does English to French subtitling: it's a very specialised job which needs years of training and supervision before you're let loose on a film by yourself, and the people who do it earn pretty good salaries), but putting subtitles on the prints is still not cheap.

For 2-10 print titles which would typically be lasered you could import more prints at a far lower cost. Given that these prints tend to do the rounds of arts centres, part time venues, film societies and other places where the bookings are short and the standard of film handling often isn't that good, more prints would mean more flexible booking opportunities and venues being less likely to get a knackered one. Furthermore electronic subtitling would also enable you to run the odd show without subtitles - say, an early evening slot one day a week - for those who can speak the language and don't want graffiti all over the screen.

Set against which is the cost of the kit and whatever Dolby or DTS charge to encode distribute the subtitle data for use on their system. If they can significantly undercut the cost of lasering a few prints to do this, then no problem. And once a venue has the kit it can be used for other things, e.g. projecting Powerpoint presentations at the odd lecture, or video footage every now and again.
 
Posted by Thomas King (Member # 2745) on 12-09-2004, 06:52 AM:
 
We're showing it on Sunday and y'all are making me distinctly apprenehsive.

Still, could be worse. Could be dubbed [Smile]

IMDB says it was digitally colour corrected at 2K, whatever that means.
 
Posted by Phil Blake (Member # 2012) on 12-10-2004, 10:35 AM:
 
Well this thread has answered a few of my queries on sub titles. 2 of our screens are large screen , short throw and I have had many issues with focusing subtiles and picture , having to keep picture in focus and title slightly out. It looks much like the short throw screens have this problems more so. In regards To John Pytlak flicker issues , the older machines I worked with all had twin two bladed shutters which counter rotated , most new machines just have a single two blade shutter , are we loosing sharpness and stability with this ?
 
Posted by John Pytlak (Member # 331) on 12-11-2004, 10:37 AM:
 
The counter-rotating shutters were primarily used to slightly increase efficiency in using the light, giving a slightly faster "scissoring" action. Focus flutter issues are best addressed by use of efficient heat filters, and being sure lamp alignment and uniformity are optimized. Curved gate designs usually help, and gate tension is an adjustable parameter. Some tried using air pressure to stabilize the film (e.g., Century "Cine-Focus").

The lens design is part of the equation, in terms of what shape the film plane is assumed to be by the lens designer. Likewise, if you have enough light, an aperture stop or "studio" lens will give greater depth of focus.

Heat Damage Part 1

Heat Damage Part 2
 
Posted by Michael Schaffer (Member # 1204) on 12-11-2004, 05:13 PM:
 
What can cause the "horizontal streaking" (for want of a better term) that I described a few posts ago?
 
Posted by John Pytlak (Member # 331) on 12-13-2004, 07:50 AM:
 
Can you post a photo of the "horizontal streaking"? Maybe a lens aberration or some form of halation?
 




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