public static extern int AFR_FSDK_FacePairMatching(IntPtr engine, ref AFR_FSDK_FACEMODEL reffeature, ref AFR_FSDK_FACEMODEL probefeature, ref float pfSimilScore);
public static extern int AFR_FSDK_ExtractFRFeature(IntPtr engine, ref ImageData pInputImage, ref AFR_FSDK_FACEINPUT pFaceRes, out AFR_FSDK_FACEMODEL pFaceModels);