public static extern int ExtractFeature(IntPtr engine, ref ImageData imageData, ref FaceFeatureInput faceFeatureInput, out FaceModel faceModel);
/// <summary>
/// 人脸比对
/// </summary>
/// <param name="bitmap">输入图片</param>
/// <param name="featureDataIndex">需要转换人脸特征的序号</param>
public static void FaceMatch(Bitmap bitmap, int featureDataIndex = -1)
{
var bmpData = bitmap.LockBits(new Rectangle(0, 0, bitmap.Width, bitmap.Height), ImageLockMode.ReadOnly, PixelFormat.Format24bppRgb);
var imageData = new ImageData
{
u32PixelArrayFormat = 513,//Rgb24,
i32Width = bitmap.Width,
i32Height = bitmap.Height,
pi32Pitch = new int[4],
ppu8Plane = new IntPtr[4]
};
imageData.pi32Pitch[0] = bmpData.Stride;
imageData.ppu8Plane[0] = bmpData.Scan0;
try
{
var ret = (ErrorCode)ArcWrapper.Detection(_DEnginer, ref imageData, out var pDetectResult);
if (ret != ErrorCode.Ok)
{
return;
}
var detectResult = Marshal.PtrToStructure <DetectResult>(pDetectResult);
FaceResults.FaceNumber = detectResult.nFace;
if (detectResult.nFace == 0)
{
return;
}
for (int i = 0; i < detectResult.nFace; i++)
{
IntPtr p = new IntPtr(detectResult.rcFace.ToInt32() + i * Marshal.SizeOf <FaceRect>());
var faceRect = Marshal.PtrToStructure <FaceRect>(p);
FaceResults[i].Rectangle = new Rectangle(faceRect.left, faceRect.top, faceRect.right - faceRect.left, faceRect.bottom - faceRect.top);
p = new IntPtr(detectResult.lfaceOrient.ToInt32() + i * Marshal.SizeOf <int>());
var faceOrient = Marshal.PtrToStructure <int>(p);
var faceFeatureInput = new FaceFeatureInput
{
rcFace = faceRect,
lOrient = faceOrient
};
if ((ErrorCode)ArcWrapper.ExtractFeature(_REngine, ref imageData, ref faceFeatureInput, out var faceModel) != ErrorCode.Ok)
{
continue;
}
if (featureDataIndex == i)
{
if (FaceResults[i].FeatureData == null)
{
FaceResults[i].FeatureData = new byte[faceModel.lFeatureSize];
}
Marshal.Copy(faceModel.pbFeature, FaceResults[i].FeatureData, 0, faceModel.lFeatureSize);
}
bool matched = false;
foreach (var item in _FaceLib.Items.OrderByDescending(ii => ii.OrderId))
{
var fm = item.FaceModel;
ArcWrapper.Match(_REngine, ref fm, ref faceModel, out float score);
if (score > 0.5)
{
matched = true;
item.OrderId = DateTime.Now.Ticks;
FaceResults[i].ID = item.ID;
FaceResults[i].Score = score;
break;
}
}
if (!matched)
{
FaceResults[i].ID = "不认识";
FaceResults[i].Score = 0;
}
}
}
finally
{
bitmap.UnlockBits(bmpData);
}
}