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Removing Vertical Line From Scanned 8mm
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stephen22
Posted: May 17 2013, 12:11 PM


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I want to remove a vertical score mark, around 5 pixels wide, running uniformly down the middle of each frame from top to bottom. The video is PAL, scanned from 8mm film, and the score mark was probably caused by a bit of grit trapped in the projector film path.

There is plently of movement in the film, so for an intelligent filter there is plenty of information in adjacent frames to paint over the damaged area.

So I would probably need something like a cross between a delogo filter and Gunnar Thalin's brilliant deshaker. Does anybody know if there is such a filter for VD or Avisynth?

Stephen
 
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Abrazo
Posted: May 17 2013, 06:05 PM


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Did you already try with the "MSU Logo Remover" filter ?
> http://www.compression.ru/video/logo_remov...l/index_en.html
 
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stephen22
Posted: May 17 2013, 07:03 PM


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Thanks for reply

Yes. I can't get it to work: I may be doing something wrong.

I sent this message to their support:

QUOTE
I am trying to remove a vertical line from a PAL video scanned from 8mm film. The line was probably caused by a bit of grit in the projector scratching the film, and is constant in every frame, about 5 pixels wide, in the centre from top to bottom. There is a lot of movement in the film (i.e. plenty of information in adjacent frames).

I am using MSU Logo Remover vers 2.3 in VD vers1.9.11, have manually created a black mask with a 5 pixel red stripe down the middle, set the Path to it, and run the filter with "Read Logo Mask".

I have probably misunderstood how the filter works, but with these settings it doesn't seem to do anything at all. Am I doing something wrong? If a filter could remove this stripe from my pictures I would certainly show my gratitude!


Can you help with this?
 
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evropej
Posted: May 17 2013, 08:19 PM


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You might have to install something like this, 32 bit for winxp or earlier versions

http://www.microsoft.com/en-us/download/de...s.aspx?id=14632
 
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Abrazo
Posted: May 17 2013, 08:52 PM


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@evropej
Thanks for the advice. I don't know that C++ runtime is a prerequisite for MSU Logo Remover to correctly run.

@stephen22
Do you get an error message or a warning from MSU Logo Remover filter version 2.3b ?

Myself I did a test with version 3.0b of that filter, just to know and see how it works for a logo (I had no exemple for a line), and it did.
You have to first run it in a first pass "Detection" mode, and once it has recognized the fixed part in the images (i.e. the logo) and has written the concerning information to the "tmp.logopack", then you can run it in the second pass, the "Removal" mode.
 
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evropej
Posted: May 17 2013, 10:38 PM


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Although I like MSU and use it often, it is not well documented and I know a lot of them have dependencies.
 
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-vdub-
Posted: May 18 2013, 01:09 AM


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With AviSynth script and virtualdub something like DeSpot maybe or some other filter http://avisynth.org/mediawiki/External_filters
 
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stephen22
Posted: May 19 2013, 09:06 AM


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Thanks for your helpful replies.

I am on Windows 7x64 and have C++ installed.

If you use the earlier 2.3 version of MSU logo remover (as suggested by authors), you can draw your own logo mask.
When I use it the way I describe, there is no error report, just no difference between original and filtered. If anyone has used this method successfully I would be glad to hear from them. (I'm probably doing something wrong)
 
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stephen22
Posted: May 22 2013, 07:08 PM


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I've had advice from the authors.

This is an amazing filter! The mistake I made was not to use pure red ($FF0000, 255,0,0) for the logo mask in the graphics editor.

By using information from adjacent frames, it has practically eliminated the scratch (except of course when people move too much in front of it.)
 
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