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Movies Forum Index » Movie Technology Forum » 2 colour imbalances in 1 Technicolor frame
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| John Mc Keown |
 Posted: Wed Jan 21, 2004 12:20 pm |
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Hello there.
I've noticed some problems with some dvds of Technicolor movies I own. One
is Warner's original release of SINGIN IN THE RAIN (not the newer one),
another is Carlton's disc of A MATTER OF LIFE AND DEATH and a third is
Republic's release of YOUNG AT HEART (though I think the credit for that
film was WarnerColor/prints by Technicolor).
At the left of, at least some frames, the image is too magenta - but at the
right, the image is too cyan.
I wondered if anybody here knows why that occurs.
I guessed that perhaps one of the separation negatives has suffered some
warpage. Does that make sense? It does seem strange that the colour cast is
always magenta to the left and cyan to the right - with no variation. Does
that point to something else?
Thankyou for any insights you could offer.
John Mc Keown |
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| Martin Hart |
| Posted: Wed Jan 21, 2004 1:57 pm |
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In article <QUvPb.1110$NU2.805@newsfep3-gui.server.ntli.net>,
john.mckeown1@ntlworld.com says...
Quote: Hello there.
I've noticed some problems with some dvds of Technicolor movies I own. One
is Warner's original release of SINGIN IN THE RAIN (not the newer one),
another is Carlton's disc of A MATTER OF LIFE AND DEATH and a third is
Republic's release of YOUNG AT HEART (though I think the credit for that
film was WarnerColor/prints by Technicolor).
At the left of, at least some frames, the image is too magenta - but at the
right, the image is too cyan.
I wondered if anybody here knows why that occurs.
I guessed that perhaps one of the separation negatives has suffered some
warpage. Does that make sense? It does seem strange that the colour cast is
always magenta to the left and cyan to the right - with no variation. Does
that point to something else?
Thankyou for any insights you could offer.
John Mc Keown
Your question might better be "Has anyone else noticed this?" In
checking the old LD copy of "Singin' in the Rain", I find no example of
the problem you're experiencing. It's hardly a perfect transfer but the
color appears to be stable across the frame. Since you find the problem
to be consistently one of magenta left and cyan right, that should be a
clue that the cause is not from the source materials used to make the
video since color errors won't always be the same.
Are you comparing VHS tapes with DVDs? That could bring up all sorts of
differences that are not related to the program content.
At the very least you can eliminate the idea that the cause is any sort
of film warpage. The films you mention were all transferred from Eastman
intermediate materials with the exception of the new "Singin' in the
Rain" which was based on digital transfers from the three color
separations and re-registered in the digital realm.
Marty
http://www.widescreenmuseum.com
The American WideScreen Museum |
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| John Mc Keown |
| Posted: Wed Jan 21, 2004 5:03 pm |
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Hello.
Thankyou very much for your speedy reply.
I'm afraid I didn't understand your question about comparing VHS to DVD.
Looking again at the AMOLAD frame, I see I have remembered wrongly. The
left-hand cast is magenta, but the right is yellow, not cyan. My apologies.
Also, the version of SINGIN IN THE RAIN I mentioned was the former release
by Warner's, and not the new digital recombination version.
I only notice this problem in viewing the discs on my computer. The colour
casts are only very slight, but they are there I believe. Still, it could be
my monitor ... or my eye-sight.
I've uploaded 3 grabs for you to have a look:
http://homepage.ntlworld.com/john.mckeown1/grabs.html
Thankyou very much again!
John Mc Keown |
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| Martin Hart |
| Posted: Wed Jan 21, 2004 8:58 pm |
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In article <t2APb.1223$NU2.191@newsfep3-gui.server.ntli.net>,
john.mckeown1@ntlworld.com says...
Quote: Hello.
Thankyou very much for your speedy reply.
I'm afraid I didn't understand your question about comparing VHS to DVD.
Looking again at the AMOLAD frame, I see I have remembered wrongly. The
left-hand cast is magenta, but the right is yellow, not cyan. My apologies.
Also, the version of SINGIN IN THE RAIN I mentioned was the former release
by Warner's, and not the new digital recombination version.
I only notice this problem in viewing the discs on my computer. The colour
casts are only very slight, but they are there I believe. Still, it could be
my monitor ... or my eye-sight.
I've uploaded 3 grabs for you to have a look:
http://homepage.ntlworld.com/john.mckeown1/grabs.html
Thankyou very much again!
John Mc Keown
John,
The grabs did not exhibit any objectionable or even noticeable color
error on my monitor. I suspect that you may need to hit the degauss
circuit on your monitor if it's the CRT type. Most of my monitors
automatically degauss when they're turned on or whenever the computer is
put through a complete reboot, but some don't. Check the on-screen menu
if yours doesn't degauss itself on a regular basis.
And while I'm on that subject, I once mistakenly moved a strong magnet
to within a few inches of a monitor and its built in degauss circuit
would not repair the severe color distortion that the magnet had
created. I wound up using a powerful soldering gun's strong magnetic
field to correct the problem. I've used tape head degaussers for smaller
color smear problems.
Marty
http://www.widescreenmuseum.com
The American WideScreen Museum |
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| Martin Hart |
| Posted: Wed Jan 21, 2004 9:20 pm |
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Guest
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In article <t2APb.1223$NU2.191@newsfep3-gui.server.ntli.net>,
john.mckeown1@ntlworld.com says...
Quote: Hello.
Thankyou very much for your speedy reply.
I'm afraid I didn't understand your question about comparing VHS to DVD.
Looking again at the AMOLAD frame, I see I have remembered wrongly. The
left-hand cast is magenta, but the right is yellow, not cyan. My apologies.
Also, the version of SINGIN IN THE RAIN I mentioned was the former release
by Warner's, and not the new digital recombination version.
I only notice this problem in viewing the discs on my computer. The colour
casts are only very slight, but they are there I believe. Still, it could be
my monitor ... or my eye-sight.
I've uploaded 3 grabs for you to have a look:
http://homepage.ntlworld.com/john.mckeown1/grabs.html
Thankyou very much again!
John Mc Keown
John,
Here's another thing for you to check. Take one of the grabs that you
see the greatest color error in and rotate it 180 degrees. If the color
error stays in the same place on your screen then it's the monitor. If
it rotates with the picture then you may have a problem with the DVD-ROM
player.
--
Marty
http://www.widescreenmuseum.com
The American WideScreen Museum |
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| John Mc Keown |
| Posted: Thu Jan 22, 2004 11:40 am |
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Martin,
Thanks for taking the time to reply. I'll check these options out today.
Your help's much appreciated!
John Mc Keown |
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