Archive:Kdenlive/Manual/Effects/Alpha manipulation/Color Selection

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    Color Selection

    This is the FilterFrei0r-select0r filter

    This is color based alpha selection. For example, this offers you a blue screen/green screen/chroma-keying effect.

    Selection Subspace options are: RGB (Red Green Blue), ABI and HCL (hue, chroma and luminance)

    Subspace Shape options are: Box, Ellipsoid, Diamond

    Edge Mode Options are: Hard, Fat, Normal, Skinny, Slope

    Operation options are: Write On Clear, Max, Min, Add and Subtract. This defines how to deal with an existing alpha channel in the clip. See Alpha Shapes for the meanings of these operations.

    See Also

    See also Blue Screen which does color based alpha selection but is a bit simpler.

    This page covers some Color Theory to help understand Hue, Chroma, Luminance etc.