public static HWRESULT HWDetectFaceKeyPoints(HW_HANDLE Handle,
IntPtr pImg,
int nImgWidth, int nImgHeight,
ref int pnMaxFace,
ref HWFaceInfo[] pFaceInfo)
{
if (pnMaxFace <= 0)
{
return(S_FAIL);
}
int nSizeStruct = Marshal.SizeOf(typeof(HWFaceInfo));
IntPtr ptr = Marshal.AllocHGlobal(nSizeStruct * pnMaxFace);
HWRESULT hr = HWDetectFaceKeyPoints(Handle, pImg, nImgWidth, nImgHeight, ref pnMaxFace, ptr);
if (hr == S_OK)
{
IntPtr ptrData = ptr;
for (int i = 0; i < pnMaxFace; i++)
{
pFaceInfo[i] = (HWFaceInfo)Marshal.PtrToStructure(ptrData, typeof(HWFaceInfo));
ptrData += nSizeStruct;
}
}
Marshal.FreeHGlobal(ptr);
return(hr);
}
//进行一对一对比
internal float CompareAFace(float fInitFaceCmpRate, int iPorttrail)
{
float fScore = fInitFaceCmpRate;
int iFtrSize = 0;
HWGetFeatureSize(handleLib, ref iFtrSize);
IntPtr pbFtrID = Marshal.AllocHGlobal(iFtrSize);
IntPtr pbFtrLiveFace = Marshal.AllocHGlobal(iFtrSize);
//如果确定是证件照，可以设Portrait= 1， 否则设Portrait = 0
HWSetPortrait(handleLib, iPorttrail);
int iMaxFace = 1;
HWFaceInfo[] idFaceInfo = new HWFaceInfo[iMaxFace];
//找身份证上的人脸
HWRESULT iRst = HWDetectFaceKeyPoints(handleLib, idPhotoData.pixel, idPhotoData.width, idPhotoData.height, ref iMaxFace, ref idFaceInfo);
if (iRst != S_OK)
{
WinCall.TraceMessage("***没找身份证上的人脸");
Marshal.FreeHGlobal(pbFtrID);
Marshal.FreeHGlobal(pbFtrLiveFace);
return(0.0F);
}
if (S_OK != HWExtractFeature(handleLib, idPhotoData.pixel, idPhotoData.width, idPhotoData.height, ref idFaceInfo[0], pbFtrID))
{
Marshal.FreeHGlobal(pbFtrID);
Marshal.FreeHGlobal(pbFtrLiveFace);
return(0.0F);
}
//找出现场照片上的人脸
var hr = S_FAIL;
lock (lockLivePhoto)
{
hr = HWExtractFeature(handleLib, livePhotoData.pixel, livePhotoData.width, livePhotoData.height, ref curLiveFaceInfo, pbFtrLiveFace);
StoreLivePhoto();
}
if (S_OK != hr)
{
Marshal.FreeHGlobal(pbFtrID);
Marshal.FreeHGlobal(pbFtrLiveFace);
return(0.0F);
}
WinCall.TraceMessage("***HWExtractFeature all ok\n");
HWCompareFeature(handleLib, pbFtrID, pbFtrLiveFace, ref fScore);
Marshal.FreeHGlobal(pbFtrID);
Marshal.FreeHGlobal(pbFtrLiveFace);
return(fScore);
}
public bool InitLib()
{
string strCurdir = Application.StartupPath;
HWRESULT hRes = HWInitialD(strCurdir);
if (S_OK != hRes)
{
return(false);
}
hRes = HWInitial(ref handleLib, strCurdir);
bool bInit = (S_OK == hRes);
if (bInit)
{
idPhotoData = PicPixel.CreatePicPixel(ID_PHOTO_WID, ID_PHOTO_HEI);
livePhotoData = PicPixel.CreatePicPixel(LIVE_PHOTO_WID, LIVE_PHOTO_HEI);
}
return(bInit);
}
internal bool DetectLivePhoto()
{
int iMaxFace = MAX_DETECT_FACES;
HWRESULT iRst = S_FAIL;
iRst = HWDetectFaceKeyPoints(handleLib, livePhotoData.pixel, livePhotoData.width, livePhotoData.height, ref iMaxFace, ref detectFaceInfos);
bool bValid = (S_OK == iRst);
if (bValid)
{
if (iMaxFace > 1)
{
string str = string.Format("***CFaceDetect::DetectLiveFace(), Faces={0}", iMaxFace);
WinCall.TraceMessage(str);
}
for (int i = 0; i < iMaxFace; i++)
{
HWFaceInfo face = detectFaceInfos[i];
if (i == 0)
{
curLiveFaceInfo = face;
continue;
}
int nMaxH = curLiveFaceInfo.m_FaceRect.bottom - curLiveFaceInfo.m_FaceRect.top;
int nMaxW = curLiveFaceInfo.m_FaceRect.right - curLiveFaceInfo.m_FaceRect.left;
int nCurH = face.m_FaceRect.bottom - face.m_FaceRect.top;
int nCurW = face.m_FaceRect.right - face.m_FaceRect.left;
if (nCurW * nCurH > nMaxW * nMaxH)
{
curLiveFaceInfo = face;
}
}
}
return(bValid);
}
