RgbMixerFilter Class

Maps a linear combination of all input color channels onto each output color channel so that c_out = f(a_in, r_in, g_in, b_in).

Namespace: Lumia.Imaging.Adjustments
Assembly: Lumia.Imaging (in Lumia.Imaging.dll) Version: 255.255.255.255

Syntax

public sealed class RgbMixerFilter : IFilter, 
    __IRgbMixerFilterPublicNonVirtuals

'Declaration
Public NotInheritable Class RgbMixerFilter
    Implements IFilter, __IRgbMixerFilterPublicNonVirtuals

public ref class RgbMixerFilter sealed : IFilter, 
    __IRgbMixerFilterPublicNonVirtuals

Lumia.Imaging.Adjustments.RgbMixerFilter = function();

Type.createClass(
    'Lumia.Imaging.Adjustments.RgbMixerFilter',
    null,
    Lumia.Imaging.IFilter,
    Lumia.Imaging.Adjustments.__IRgbMixerFilterPublicNonVirtuals);

Remarks

In practice that means the resulting color is calculated from 16 curves following the equation:

    a_out = sat (Alpha.Alpha[a_in] + Red.Alpha[r_in] + Green.Alpha[g_in] + Blue.Alpha[b_in])
    r_out = sat (Alpha.Red[a_in] + Red.Red[r_in] + Green.Red[g_in] + Blue.Red[b_in])
    g_out = sat (Alpha.Green[a_in] + Red.Green[r_in] + Green.Green[g_in] + Blue.Green[b_in])
    b_out = sat (Alpha.Blue[a_in] + Red.Blue[r_in] + Green.Blue[g_in] + Blue.Blue[b_in])

Unused curves can be set to null.

Examples

using (var filterEffect = new FilterEffect(source))
{
    // Initialize the filter and add the filter to the FilterEffect collection
    var filter = new RgbMixerFilter();





    #region Alpha Output

    filter.Alpha.Alpha.SetPoint(0, 0);
    filter.Alpha.Alpha.SetPoint(255, 255);

    filter.Red.Alpha.SetPoint(0, 0);
    filter.Red.Alpha.SetPoint(255, 0);

    filter.Green.Alpha.SetPoint(0, 0);
    filter.Green.Alpha.SetPoint(255, 0);

    filter.Blue.Alpha.SetPoint(0, 0);
    filter.Blue.Alpha.SetPoint(255, 0);

    #endregion

    #region Red Output

    filter.Alpha.Red.SetPoint(0, 0);
    filter.Alpha.Red.SetPoint(255, 0);

    filter.Red.Red.SetPoint(0, 0);
    filter.Red.Red.SetPoint(255, 128);

    filter.Blue.Red.SetPoint(0, 0);
    filter.Blue.Red.SetPoint(255, 0);

    filter.Green.Red.SetPoint(0, 0);
    filter.Green.Red.SetPoint(255, 128);

    #endregion

    #region Green Output

    filter.Alpha.Green.SetPoint(0, 0);
    filter.Alpha.Green.SetPoint(255, 0);

    filter.Red.Green.SetPoint(0, 0);
    filter.Red.Green.SetPoint(255, 128);

    filter.Green.Green.SetPoint(0, 0);
    filter.Green.Green.SetPoint(255, 0);

    filter.Blue.Green.SetPoint(0, 0);
    filter.Blue.Green.SetPoint(255, 128);

    #endregion

    #region Blue Output

    filter.Alpha.Blue.SetPoint(0, 0);
    filter.Alpha.Blue.SetPoint(255, 0);

    filter.Red.Blue.SetPoint(0, 0);
    filter.Red.Blue.SetPoint(255, 0);

    filter.Green.Blue.SetPoint(0, 0);
    filter.Green.Blue.SetPoint(255, 128);

    filter.Blue.Blue.SetPoint(0, 0);
    filter.Blue.Blue.SetPoint(255, 128);

    #endregion

    filterEffect.Filters = new IFilter[] { filter };

    // Create a target where the filtered image will be rendered to
    var target = new WriteableBitmap(width, height);

    // Create a new renderer which outputs WriteableBitmaps
    using (var renderer = new WriteableBitmapRenderer(filterEffect, target))
    {
        // Render the image with the filter(s)
        await renderer.RenderAsync();

        // Set the output image to Image control as a source
        ImageControl.Source = target;
    }

    await SaveEffectAsync(filterEffect, "RgbMixerFilter.jpg", outputImageSize);
}

Inheritance Hierarchy

System.Object
  Lumia.Imaging.Adjustments.RgbMixerFilter

Version Information

Lumia Imaging SDK

Supported in: 2.0

See Also

RgbMixerFilter.RgbMixerFilter Members

Lumia.Imaging.Adjustments Namespace