public byte[] GetFaceData(Bitmap bitmap, Face_FD face_FD)
{
bool isFace = face_FD.CheckFace(bitmap, out AFD_FSDK_FACERES faceRes, out IntPtr offInputPtr, out IntPtr imageDataPtr);
if (!isFace)
{
Error.Log(ErrorType.inputError);
return(null);
}
AFR_FSDK_FaceInput faceinput = new AFR_FSDK_FaceInput();
faceinput.lOrient = (int)Marshal.PtrToStructure(faceRes.lfaceOrient, typeof(int));
MRECT rect = (MRECT)Marshal.PtrToStructure(faceRes.rcFace, typeof(MRECT));
faceinput.rcFace = rect;
IntPtr faceInputPtr = Marshal.AllocHGlobal(Marshal.SizeOf(faceinput));
Marshal.StructureToPtr(faceinput, faceInputPtr, false);
AFR_FSDK_FaceModel faceModel = new AFR_FSDK_FaceModel();
IntPtr faceModelPtr = Marshal.AllocHGlobal(Marshal.SizeOf(faceModel));
int ret = FaceAPI.AFR_FSDK_ExtractFRFeature(detectEngine, offInputPtr,
faceInputPtr, faceModelPtr);
if (ret != 0) //返回值为0代表获取成功
{
Log.AddLog("获取不到人脸信息。");
return(null);
}
faceModel = (AFR_FSDK_FaceModel)Marshal.PtrToStructure(faceModelPtr, typeof(AFR_FSDK_FaceModel));
Marshal.FreeHGlobal(faceModelPtr);
byte[] byteData = new byte[faceModel.lFeatureSize];
Marshal.Copy(faceModel.pbFeature, byteData, 0, faceModel.lFeatureSize);
Marshal.FreeHGlobal(faceInputPtr);
return(byteData);
}
public float CompareFace(byte[] data, byte[] beData) //返回相似系数
{
IntPtr dataPtr = Marshal.AllocHGlobal(data.Length);
Marshal.Copy(data, 0, dataPtr, data.Length);
AFR_FSDK_FaceModel faceModel = new AFR_FSDK_FaceModel
{
lFeatureSize = data.Length,
pbFeature = dataPtr
};
IntPtr beDataPtr = Marshal.AllocHGlobal(beData.Length);
Marshal.Copy(beData, 0, beDataPtr, beData.Length);
AFR_FSDK_FaceModel beFaceModel = new AFR_FSDK_FaceModel
{
lFeatureSize = beData.Length,
pbFeature = beDataPtr
};
IntPtr firstPtr = Marshal.AllocHGlobal(Marshal.SizeOf(faceModel));
Marshal.StructureToPtr(faceModel, firstPtr, false);
IntPtr secondPtr = Marshal.AllocHGlobal(Marshal.SizeOf(beFaceModel));
Marshal.StructureToPtr(beFaceModel, secondPtr, false);
float result = 0; //大约0.55，是同个人
int ret = FaceAPI.AFR_FSDK_FacePairMatching(detectEngine, firstPtr, secondPtr, ref result);
Marshal.FreeHGlobal(dataPtr);
Marshal.FreeHGlobal(beDataPtr);
Marshal.FreeHGlobal(firstPtr);
Marshal.FreeHGlobal(secondPtr);
return(result);
}
//检查是否存在人脸，imageDataPtr必须在offInputPtr用完后释放掉
public bool CheckFace(Bitmap bitmap, out AFD_FSDK_FACERES faceRes, out IntPtr offInputPtr, out IntPtr imageDataPtr)
{
byte[] imageData = BitmapToBmp(bitmap, out int width, out int height, out int pitch);
imageDataPtr = Marshal.AllocHGlobal(imageData.Length);
Marshal.Copy(imageData, 0, imageDataPtr, imageData.Length);
ASVLOFFSCREEN offInput = new ASVLOFFSCREEN();
offInput.u32PixelArrayFormat = 513;
offInput.ppu8Plane = new IntPtr[4];
offInput.ppu8Plane[0] = imageDataPtr;
offInput.i32Width = width;
offInput.i32Height = height;
offInput.pi32Pitch = new int[4];
offInput.pi32Pitch[0] = pitch;
offInputPtr = Marshal.AllocHGlobal(Marshal.SizeOf(offInput));
Marshal.StructureToPtr(offInput, offInputPtr, false);
faceRes = new AFD_FSDK_FACERES();
IntPtr faceResPtr = Marshal.AllocHGlobal(Marshal.SizeOf(faceRes));
int detectResult = FaceAPI.AFD_FSDK_StillImageFaceDetection(detectEngine, offInputPtr, ref faceResPtr);
faceRes = (AFD_FSDK_FACERES)Marshal.PtrToStructure(faceResPtr, typeof(AFD_FSDK_FACERES));
MRECT rect = (MRECT)Marshal.PtrToStructure(faceRes.rcFace, typeof(MRECT));
bool ret = faceRes.nFace > 0;
imageData = null;
//Marshal.FreeHGlobal(imageDataPtr); //这个指针内存泄漏了
//Marshal.FreeHGlobal(faceResPtr);
//GC.Collect();
return(ret);
}