faceclustering_detect.cs

// detect all faces
var chips = new List<Matrix<RgbPixel>>();
var faces = new List<Rectangle>();
Console.WriteLine("Detecting faces...");
foreach (var face in detector.Operator(img))
{
    // detect landmarks
    var shape = predictor.Detect(img, face);

    // extract normalized and rotated 150x150 face chip
    var faceChipDetail = Dlib.GetFaceChipDetails(shape, 150, 0.25);
    var faceChip = Dlib.ExtractImageChip<RgbPixel>(img, faceChipDetail);

    // convert the chip to a matrix and store
    var matrix = new Matrix<RgbPixel>(faceChip);
    chips.Add(matrix);
    faces.Add(face);
}
Console.WriteLine($"   Found {chips.Count} faces in image");

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