private static byte[] ExtractSingleFaceFeature(IntPtr pEngine, ImageInfo imageInfo, MRECT rect, int faceOrient)
{
var singleFaceInfo = new ASF_SingleFaceInfo();
singleFaceInfo.faceRect = rect;
singleFaceInfo.faceOrient = faceOrient;
IntPtr pSingleFaceInfo = Marshal.AllocHGlobal(Marshal.SizeOf <ASF_SingleFaceInfo>());
Marshal.StructureToPtr(singleFaceInfo, pSingleFaceInfo, false);
IntPtr pFaceFeature = Marshal.AllocHGlobal(Marshal.SizeOf <ASF_FaceFeature>());
try
{
int retCode = ASFFaceFeatureExtract(pEngine, imageInfo.width, imageInfo.height, imageInfo.format, imageInfo.imgData, pSingleFaceInfo, pFaceFeature);
if (retCode == 0)
{
ASF_FaceFeature faceFeature = Marshal.PtrToStructure <ASF_FaceFeature>(pFaceFeature);
byte[] feature = new byte[faceFeature.featureSize];
Marshal.Copy(faceFeature.feature, feature, 0, faceFeature.featureSize);
return(feature);
}
if (retCode == 81925)
{
throw new Exception("人脸特征检测结果置信度低!");
}
else
{
return(null);
}
}
catch (Exception ex)
{
throw new Exception($"Arcsoft_Face_Action-->ExtractSingleFaceFeature exception: {ex.Message}");
}
finally
{
Marshal.FreeHGlobal(pSingleFaceInfo);
Marshal.FreeHGlobal(pFaceFeature);
}
}
private byte[] ExtractSingleFaceFeature(IntPtr pEngine, ImageInfo imageInfo, MRECT rect, int faceOrient)
{
var singleFaceInfo = new ASF_SingleFaceInfo();
singleFaceInfo.faceRect = rect;
singleFaceInfo.faceOrient = faceOrient;
IntPtr pSingleFaceInfo = Marshal.AllocHGlobal(Marshal.SizeOf <ASF_SingleFaceInfo>());
Marshal.StructureToPtr(singleFaceInfo, pSingleFaceInfo, false);
IntPtr pFaceFeature = Marshal.AllocHGlobal(Marshal.SizeOf <ASF_FaceFeature>());
try
{
int retCode = ASFFaceFeatureExtract(pEngine, imageInfo.width, imageInfo.height, imageInfo.format, imageInfo.imgData, pSingleFaceInfo, pFaceFeature);
if (retCode == 0)
{
ASF_FaceFeature faceFeature = Marshal.PtrToStructure <ASF_FaceFeature>(pFaceFeature);
byte[] feature = new byte[faceFeature.featureSize];
Marshal.Copy(faceFeature.feature, feature, 0, faceFeature.featureSize);
return(feature);
}
else
{
return(null);
}
}
catch
{
return(null);
}
finally
{
Marshal.FreeHGlobal(pSingleFaceInfo);
Marshal.FreeHGlobal(pFaceFeature);
}
}
public static IntPtr PutFeatureByteIntoFeatureIntPtr(byte[] data)
{
try
{
if (data.Length > 0)
{
ASF_FaceFeature localFeature = new ASF_FaceFeature();
localFeature.featureSize = data.Length;
localFeature.feature = Marshal.AllocHGlobal(localFeature.featureSize);
Marshal.Copy(data, 0, localFeature.feature, data.Length);
IntPtr intPtrFeature = Marshal.AllocHGlobal(Marshal.SizeOf <ASF_FaceFeature>());
Marshal.StructureToPtr(localFeature, intPtrFeature, false);
return(intPtrFeature);
}
else
{
return(IntPtr.Zero);
}
}
catch
{
return(IntPtr.Zero);
}
}