public (List <Rectangle>, List <Rectangle>) Detect(IInputArray image)
{
var faces = new List <Rectangle>();
var eyes = new List <Rectangle>();
using (var ugray = new GpuMat())
{
CudaInvoke.CvtColor(image, ugray, Emgu.CV.CvEnum.ColorConversion.Bgr2Gray);
//normalizes brightness and increases contrast of the image
CudaInvoke.EqualizeHist(ugray, ugray);
//Detect the faces from the gray scale image and store the locations as rectangle
//The first dimensional is the channel
//The second dimension is the index of the rectangle in the specific channel
var facesDetected = GetRectangles(faceClassifier, ugray);
faces.AddRange(facesDetected);
foreach (var f in facesDetected)
{
//Get the region of interest on the faces
using (var faceRegion = new GpuMat(ugray, new Range(f.Bottom, f.Top), new Range(f.Left, f.Right)))
{
var eyesDetected = GetRectangles(eyeClassifier, faceRegion);
foreach (var e in eyesDetected)
{
var eyeRect = e;
eyeRect.Offset(f.X, f.Y);
eyes.Add(eyeRect);
}
}
}
}
return(faces, eyes);
}