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Graduation Curves Filter Q?, what am I doing wrong
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Argonaut
Posted: Aug 30 2009, 09:05 AM


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Suggested that I use Graduation Filter to remove Blue cast (increase Red) .. in underwater video clips.


I'm stumped in getting it to work ...
Loaded the filter OK, then get the 'control panel'
use import to load the "less Blue" amp file.

But when I click 'preview' the preview window shows no difference ?

If I select Blue from the RGB window ... I see the Blue curve.
Am I supposed to do anything particular with input output value buttons ?

Same if I also apply the "Red+" amp file .... even with less Blue and more Red applied the preview looks exactly the same ? am I missing a point.


To check my basics I then loaded the "Red/Blue/Green adjustment" filter (Donald Graft) ... now if I move the Red all way up to x3 it still has no effect ... (assume no red there to multiply) .. but if I lower Green & Blue they do have an immediate effect.


Am I missing a step in using the Graduation Filter ?
 
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stephanV
Posted: Aug 30 2009, 09:14 AM


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Have you set the processing button in the filter (right bottom) to 'RGB + R/G/B'?

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useful links:
VirtualDub, Input plugins and filters, AviSynth, AVI-Mux GUI, AC3ACM by fcchandler, VirtualDub FAQ
 
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