faceclustering_highlight.cs

// create a color palette for plotting
var palette = new RgbPixel[]
{
    new RgbPixel(0xe6, 0x19, 0x4b),
    new RgbPixel(0xf5, 0x82, 0x31),
    new RgbPixel(0xff, 0xe1, 0x19),
    new RgbPixel(0xbc, 0xf6, 0x0c),
    new RgbPixel(0x3c, 0xb4, 0x4b),
    new RgbPixel(0x46, 0xf0, 0xf0),
    new RgbPixel(0x43, 0x63, 0xd8),
    new RgbPixel(0x91, 0x1e, 0xb4),
    new RgbPixel(0xf0, 0x32, 0xe6),
    new RgbPixel(0x80, 0x80, 0x80)
};

// draw rectangles on each face using the cluster color
for (var i = 0; i < faces.Count; i++)
{
    Dlib.DrawRectangle(img, faces[i], color: palette[labels[i]], thickness: 4);
}

// the rest of the code goes here...