1. Code Samples
  2. Transforms
  3. Tint

Tint Using Lab

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ChannelsColor ConversionPipelineTransform

Tints using Lab color space.

Code Snippet

var color = new RgbColor(250, 178, 79);

var labColor = (LabColor)color.Convert(PixelFormat.Format24bppLab);
var a = labColor.A;
var b = labColor.B;

using (var lChannel = new Bitmap())
{
    // Convert to Lab color space and get lightness channel
    using (var reader = ImageReader.Create("Chicago.jpg"))
    using (var labConverter = new ColorConverter(PixelFormat.Format24bppLab))
    using (var splitter = new LabChannelSplitter())
    {
        splitter.L = lChannel;

        Pipeline.Run(reader + labConverter + splitter);
    }

    // Create a and b channels, combine with lightness channel and convert to RGB color space
    using (var combiner = new LabChannelCombiner())
    using (var aChannel = new Bitmap(lChannel.Width, lChannel.Height, PixelFormat.Format8bppGrayscale, new GrayscaleColor((byte)(a + 127))))
    using (var bChannel = new Bitmap(lChannel.Width, lChannel.Height, PixelFormat.Format8bppGrayscale, new GrayscaleColor((byte)(b + 127))))
    using (var rgbConverter = new ColorConverter(PixelFormat.Format24bppRgb))
    using (var writer = ImageWriter.Create("TintUsingLab.jpg"))
    {
        combiner.L = lChannel;
        combiner.A = aChannel;
        combiner.B = bChannel;

        rgbConverter.DestinationProfile = ColorProfile.FromSrgb();

        Pipeline.Run(combiner + rgbConverter + writer);
    }
}

Input

Chicago.jpg

Chicago.jpg

Output

TintUsingLab.jpg

TintUsingLab.jpg

Used APIs