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  1. Member
    Join Date
    Apr 2003
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    United States
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    Hi all

    Does anyone know what the green areas above the trees and the house is called? And what filter(s) should I use to get rid of or minimize it? Or is this something hardware can only address?

    Brainiac

    anderson1.bmp
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  2. Member
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    Search Comp PM
    In that picture, it is not merely color bleed. The sky is WAY overexposed, causing color distortions.

    Good luck finding a great remedy for that. I'd start with the Levels filter in VirtualDub, dropping the luminance.
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  3. Mod Neophyte Super Moderator redwudz's Avatar
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    Sep 2002
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    USA
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    I see that more commonly with videos that have been copied too many times. But try the YUV saturation/offset filter. It sort of works, at least the green is gone. Probably a bit more touch-up with Color Mill would help. Color Mill is also available on that site below and it does have level adjustments. I think there's a better filter for offsetting the colors, but not sure which one it is.

    The listed filter is at: http://www.thedeemon.com/VirtualDubFilters/ Near the bottom of the page.

    Before:



    After:

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  4. Member
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    Thanks for the replies.

    Brainiac
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  5. The colors you're trying to get rid of have shades of green. But the trees and grass also have greens.

    This poses a big problem when you use filters that affect the entire frame and work by affecting color.

    If you want to preserve everything else, you will probably have to limit the damage and selectively filter (i.e. use masks). Virtualdub is probably not the ideal tool for this
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  6. If your source is YUV you will have better luck with AviSynth because the YUV to RGB conversion in VirtualDub is crushing the over bright areas. At least use AviSynth to open the source and convert to RGB with the PC.601 matrix:

    WhateverSource("filename.ext")
    ConvertToRGB(matrix="PC.601")

    That will keep the bright and dark areas from being crushed in VirtualDub. Be sure to get blacks at 0 and whites a 255 in VirtualDub before saving with a codec that expects rec.601.
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