public FaceLandmark[] DetectFaceLandmarks(Array2dRgbPixel array2dRgbPixel, double faceDetectionThreshold)
{
var ret = new FaceLandmark[0];
try
{
dets = NativeMethods.vector_FaceLandmarkInternal_new1();
NativeMethods.dlib_face_landmark_detection_operator(detector, array2dRgbPixel.DlibArray2dRgbPixel, faceDetectionThreshold, dets);
Trace.Assert(dets != null && dets != IntPtr.Zero);
long count = NativeMethods.vector_FaceLandmarkInternal_getSize(dets).ToInt64();
// If it does not return ret here, exception occurs.
if (count == 0)
{
return(ret);
}
unsafe
{
FaceLandmarkInternal *faceLandmarkInternals = (FaceLandmarkInternal *)NativeMethods.vector_FaceLandmarkInternal_getPointer(dets).ToPointer();
ret = new FaceLandmark[count];
for (int i = 0; i < count; i++)
{
ret[i] = new FaceLandmark(faceLandmarkInternals[i]);
}
}
}
catch (Exception ex)
{
#if DEBUG
Debugger.Break();
#endif
Console.WriteLine(ex.Message);
}
finally
{
ReleaseDets();
}
return(ret);
}
public void RawApiFaceLandmarkDetectionUsingMemoryInput()
{
const string imagePath = "images\\lenna.bmp";
var imageBytes = File.ReadAllBytes(imagePath);
IntPtr detector = IntPtr.Zero;
IntPtr dets = IntPtr.Zero;
try
{
using (var window = new ImageWindow())
using (var image = new Array2dRgbPixel())
{
Console.WriteLine($"Size: ({image.Width},{image.Height})");
Trace.Assert(image.Width == 0 && image.Height == 0);
window.SetImage(image);
OpenCvSharp.Cv2.WaitKey(Cv2WaitKeyDelay);
NativeMethods.dlib_load_bmp_array2d_rgbpixel(image.DlibArray2dRgbPixel, imageBytes, new IntPtr(imageBytes.Length));
Console.WriteLine($"Size: ({image.Width},{image.Height})");
Trace.Assert(image.Width == 512 && image.Height == 480);
window.SetImage(image);
OpenCvSharp.Cv2.WaitKey(Cv2WaitKeyDelay);
image.SetBitmap(new System.Drawing.Bitmap(imagePath));
Console.WriteLine($"Size: ({image.Width},{image.Height})");
Trace.Assert(image.Width == 512 && image.Height == 480);
window.SetImage(image);
OpenCvSharp.Cv2.WaitKey(Cv2WaitKeyDelay);
image.PyramidUp();
Console.WriteLine($"Size: ({image.Width},{image.Height})");
window.SetImage(image);
OpenCvSharp.Cv2.WaitKey(Cv2WaitKeyDelay);
detector = NativeMethods.dlib_get_face_landmark_detection("D:/Data/Dlib/shape_predictor_68_face_landmarks.dat");
dets = NativeMethods.vector_FaceLandmarkInternal_new1();
NativeMethods.dlib_face_landmark_detection_operator(detector, image.DlibArray2dRgbPixel, -0.5, dets);
Trace.Assert(dets != null && dets != IntPtr.Zero);
long count = NativeMethods.vector_FaceLandmarkInternal_getSize(dets).ToInt64();
// If it does not return ret here, exception occurs.
if (count > 0)
{
unsafe
{
FaceLandmarkInternal *faceLandmarkInternals = (FaceLandmarkInternal *)NativeMethods.vector_FaceLandmarkInternal_getPointer(dets).ToPointer();
for (int i = 0; i < count; i++)
{
Console.WriteLine(new FaceLandmark(faceLandmarkInternals[i]));
}
}
}
}
}
finally
{
if (detector != IntPtr.Zero)
{
NativeMethods.dlib_face_landmark_detection_delete(detector);
}
if (dets != IntPtr.Zero)
{
NativeMethods.vector_FaceLandmarkInternal_delete(dets);
}
}
}
