//特征提取
private FaceModel ExtractFeature(Bitmap bitmap)
{
var detectResult = Detection(bitmap);
var bmpData = bitmap.LockBits(new Rectangle(0, 0, bitmap.Width, bitmap.Height)
, ImageLockMode.ReadOnly, PixelFormat.Format24bppRgb);
var imageData = new ImageData
{
PixelArrayFormat = 513,//Rgb24,
Width = bitmap.Width,
Height = bitmap.Height,
Pitch = new int[4] { bmpData.Stride, 0, 0, 0 },
ppu8Plane = new IntPtr[4] { bmpData.Scan0, IntPtr.Zero, IntPtr.Zero, IntPtr.Zero }
};
var FFI = new FaceFeatureInput();
FFI.FaceRect = Marshal.PtrToStructure<FaceRect>(detectResult.PFaceRect);
FFI.Orient = 1;
FaceModel faceModel = new FaceModel() { Size = 22020, PFeature = Marshal.AllocCoTaskMem(22020) };
faceModel.Size = 0;
if (ArcWrapper.ExtractFeature(_REnginer, ref imageData, ref FFI, out var fm) == (int)ErrorCode.Ok)
{
faceModel.Size = fm.Size;
ArcWrapper.CopyMemory(faceModel.PFeature, fm.PFeature, fm.Size);
}
return faceModel;
}
public static extern int ExtractFeature(IntPtr engine, ref ImageData imageData, ref FaceFeatureInput faceFeatureInput, out FaceModel faceModel);
