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Digital
Image Stabilization
Published : 26th March 2004
Hello,
I have a series of 2k scans shot on a steady-tested Arri 435.
About 20k of the frames have a jitter that I need to remove.
Basically the frames move left to right about 1 pixel every
frame. Does anyone have any knowledge of a software package
that can remove this? Removing this by hand will no doubt
be tedious!
Thanks,
Jonas Tankersley
Director Interactive Design
iPIX
Jonas Tankersley wrote :
>I have a series of 2k scans shot on a steady-tested Arri 435. About 20k >of the frames have a "jitter" that I need to remove.
MTI's Correct software can do this -- not cheap but you could
go to a facility that has it. Was the problem the camera or
the scanner? Were they scanned on a pin-registered cine scanner
(Imagica, Oxberry, etc.)
or on a telecine?
Jeff Kreines
What about using a Flame and his image stabilization system?
Even combustion can do it, if you track a single pixel.
Pol Turrents
Spanish DP
I'm pretty certain the problem was in the camera. It was scanned
on a spirit datacine at Crawford in Atlanta and they reviewed
the footage and saw that it is on the film.
Jonas Tankersley
Can combustion do this automatically or will I have to plot
the point on each frame?
Thanks,
Jonas Tankersley
Jonas :
How many pixels wide is your frame?
Robert Costanza
Jonas Tankersley wrote:
>I'm pretty certain the problem was in the camera. It was scanned on a >spirit datacine at Crawford in Atlanta and they reviewed the footage and >saw that it is on the film.
I have yet to encounter a (non-pin registered) transfer facility
that has the ability to examine film and to be able to accurately
say it was camera registration.
You might be able to save yourself a lot of grief and expense
if you have a portion of the footage in question re-transferred
at such a facility for comparison. You might be pleasantly
surprised.
I refer you to Jeff Kreines question: Were they scanned on
a pin-registered cine scanner (Imagica, Oxberry, etc.) or
on a telecine?
Visible side to side motion is uncommon as a registration
problem, but not unknown in transfers.
Brian Heller
IA 600 DP
>Can combustion do this automatically or will I have to plot the point on >each frame?
If you have a pixel which has to be steady, simply use the
tracker and stabilization option under the operators menu,
and combustion will move the frame to keep the pixel in the
same place. The problem came if there are movements on the
image and you don't have any (supposed) static pixel BTW It's
a totally automated process.
Pol Turrents
Spanish DP
Brian Heller wrote:
>Visible side to side motion is uncommon as a registration problem, but >not unknown in transfers.
Yes. The Spirit's edge guide is not very long, and cyclical
error of a couple of pixels (in 2K or HD) is probably considered
well within spec.
I'd rescan it on a real scanner. If you're doing precision
efx work, that's the only way. Not sure anyone in Atlanta
does this, but lots of places in LA do...
Jeff Kreines
Jonas Tankersley wrote :
>I have a series of 2k scans shot on a steady-tested Arri 435. About 20k >of the frames have a "jitter" that I need to remove. Basically the frames >move left to right about 1 pixel every frame.
I reckon you could do this with Virtual dub with a little
script. http://www.virtualdub.org
Cheers
Martin Heffels
filmmaker/DP/editor/certified cable tester
Sydney, Australia
Jeff,
Do you have any recommendations for an efx scanner house in
LA?
Also, I think the mathtech guys are going to come through
for me - they were able to stabilize a sample.
Jonas Tankersley
Ps - Thanks everyone for the input - very helpful!!
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