/// <summary>
/// 人脸比对
/// </summary>
/// <param name="data1">第一张人脸数据</param>
/// <param name="data2">第二张人脸数据</param>
/// <returns></returns>
public float Compare(byte[] data1, byte[] data2)
{
try
{
FaceFeature feature1 = new FaceFeature();
feature1.feature = Marshal.AllocHGlobal(data1.Length);
Marshal.Copy(data1, 0, feature1.feature, data1.Length);
feature1.featureSize = data1.Length;
IntPtr pLocalFeature1 = Marshal.AllocHGlobal(Marshal.SizeOf(feature1));
Marshal.StructureToPtr(feature1, pLocalFeature1, false);
FaceFeature feature2 = new FaceFeature();
feature2.feature = Marshal.AllocHGlobal(data2.Length);
Marshal.Copy(data2, 0, feature2.feature, data2.Length);
feature2.featureSize = data2.Length;
IntPtr pLocalFeature2 = Marshal.AllocHGlobal(Marshal.SizeOf(feature2));
Marshal.StructureToPtr(feature2, pLocalFeature2, false);
float similar = 0.0f;
ASFAPI.ASFFaceFeatureCompare(hEngine, pLocalFeature1, pLocalFeature2, out similar);
return(similar);
}
catch (Exception ex)
{
return(0.0f);
}
}
/// <summary>
/// 获取人脸特征
/// </summary>
/// <returns></returns>
public byte[] getFaceFeature(Bitmap image)
{
BitmapImage bitmapImage = null;
var multiFaceInfo = DetectFaces(image, out bitmapImage);
if (multiFaceInfo.faceNum == 0 || multiFaceInfo.faceOrient == IntPtr.Zero || multiFaceInfo.faceRect == IntPtr.Zero)
{
return(null);
}
SingleFaceInfo info = new SingleFaceInfo();
Mrect mrect = new Mrect();
int[] orientArray = new int[multiFaceInfo.faceNum];
Marshal.Copy(multiFaceInfo.faceOrient, orientArray, 0, orientArray.Length);
info.faceOrient = orientArray[0];
byte[] byteArray = new byte[4 * 4];
Marshal.Copy(multiFaceInfo.faceRect, byteArray, 0, byteArray.Length);
int size = Marshal.SizeOf(mrect);
IntPtr buffer = Marshal.AllocHGlobal(size);
try
{
Marshal.Copy(byteArray, 0, buffer, size);
mrect = (Mrect)Marshal.PtrToStructure(buffer, typeof(Mrect));
}
finally
{
Marshal.FreeHGlobal(buffer);
}
info.faceRect = mrect;
FaceFeature feature = new FaceFeature();
IntPtr ptr1 = Marshal.AllocHGlobal(Marshal.SizeOf(info));
Marshal.StructureToPtr(info, ptr1, false);
var result = ASFAPI.ASFFaceFeatureExtract(hEngine, bitmapImage.Width, bitmapImage.Height, bitmapImage.Format, bitmapImage.ImageData, ptr1, ref feature);
Marshal.FreeHGlobal(ptr1);
byte[] data = null;
if (result == 0 && feature.featureSize > 0 && feature.feature != IntPtr.Zero)
{
data = new byte[1032];
Marshal.Copy(feature.feature, data, 0, 1032);
return(data);
}
else
{
return(null);
}
}
/// <summary>
/// 人脸比对
/// </summary>
/// <param name="data1">第一张人脸数据</param>
/// <param name="data2">第二张人脸数据</param>
/// <returns></returns>
public float Compare(byte[] data1, byte[] data2)
{
FaceFeature feature1 = new FaceFeature();
FaceFeature feature2 = new FaceFeature();
IntPtr ptr1 = Marshal.AllocHGlobal(data1.Length);
IntPtr ptr2 = Marshal.AllocHGlobal(data2.Length);
Marshal.Copy(data1, 0, ptr1, data1.Length);
Marshal.Copy(data2, 0, ptr2, data2.Length);
feature1.feature = ptr1;
feature1.featureSize = 1032;
feature2.feature = ptr2;
feature2.featureSize = 1032;
float similar = 0.0f;
ASFAPI.ASFFaceFeatureCompare(hEngine, feature1, feature2, ref similar);
return(similar);
}
public static extern int ASFFaceFeatureCompare(IntPtr hEngine, FaceFeature feature1, FaceFeature feature2, ref float confidenceLevel);
public static extern int ASFFaceFeatureExtract(IntPtr hEngine, int width, int height, int format, byte[] imgData, IntPtr faceInfo, ref FaceFeature feature);