public static extern int ExtractFeature(IntPtr engine, ref ImageData imageData, ref FaceFeatureInput faceFeatureInput, out FaceModel pFaceModels);
private void MatchFrame()
{
#region 获取图片 1毫秒
var bitmap = this.VideoPlayer.GetCurrentVideoFrame();
#endregion
Stopwatch sw = new Stopwatch();
sw.Start();
#region 图片转换 0.7-2微妙
var bmpData = bitmap.LockBits(new Rectangle(0, 0, bitmap.Width, bitmap.Height), ImageLockMode.ReadOnly, PixelFormat.Format24bppRgb);
var imageData = new Face.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;
sw.Stop();
_FaceResult.Score = sw.ElapsedTicks;
#endregion
try
{
#region 人脸检测 5-8毫秒
var ret = (Face.ErrorCode)Face.Detect.Detection(_FaceDetectEnginer, ref imageData, out pDetectResult);
if (ret != Face.ErrorCode.Ok)
{
return;
}
var detectResult = Marshal.PtrToStructure <Face.DetectResult>(pDetectResult);
if (detectResult.nFace == 0)
{
return;
}
var faceRect = Marshal.PtrToStructure <Face.FaceRect>(detectResult.rcFace);
_FaceResult.Rectangle = new Rectangle((int)(faceRect.left * _RateW), (int)(faceRect.top * _RateH), (int)((faceRect.right - faceRect.left) * _RateW), (int)((faceRect.bottom - faceRect.top) * _RateH));
var faceOrient = Marshal.PtrToStructure <int>(detectResult.lfaceOrient);
#endregion
#region 性别识别基本准确 年龄识别误差太大，没什么应用场景
//Face.ExtraFaceInput faceInput = new Face.ExtraFaceInput()
//{
// lFaceNumber = facesDetect.nFace,
// pFaceRectArray = Marshal.AllocHGlobal(Marshal.SizeOf(faceRect)),
// pFaceOrientArray = Marshal.AllocHGlobal(Marshal.SizeOf(faceOrient))
//};
//Marshal.StructureToPtr(faceRect, faceInput.pFaceRectArray, false);
//Marshal.StructureToPtr(faceOrient, faceInput.pFaceOrientArray, false);
//var ageResult = Face.Age.ASAE_FSDK_AgeEstimation_Preview(_FaceAgeEngine, ref imageData, ref faceInput, out var pAgeRes);
//var ages = pAgeRes.pResult.ToStructArray<int>(pAgeRes.lFaceNumber);
//var genderResult = Face.Gender.ASGE_FSDK_GenderEstimation_Preview(_FaceGenderEngine, ref imageData, ref faceInput, out var pGenderRes);
//var genders = pGenderRes.pResult.ToStructArray<int>(pGenderRes.lFaceNumber);
//_FaceResult.Age = ages[0];
//_FaceResult.Gender = genders[0];
//Marshal.FreeHGlobal(faceInput.pFaceOrientArray);
//Marshal.FreeHGlobal(faceInput.pFaceRectArray);
#endregion
#region 获取人脸特征 160-180毫秒
var faceFeatureInput = new Face.FaceFeatureInput
{
rcFace = faceRect,
lOrient = faceOrient
};
ret = (Face.ErrorCode)Face.Match.ExtractFeature(_FaceMatchEngine, ref imageData, ref faceFeatureInput, out faceModel);
#endregion
if (ret == Face.ErrorCode.Ok)
{
if (_RegisterClicked)
{
_RegisterFeatureData = new byte[faceModel.lFeatureSize];
Marshal.Copy(faceModel.pbFeature, _RegisterFeatureData, 0, faceModel.lFeatureSize);
}
#region 人脸识别（100张人脸） 17-20毫秒
foreach (var item in _FaceLib.Items.OrderByDescending(ii => ii.OrderId))
{
//Console.WriteLine(item.OrderId);
var fm = item.FaceModel;
int fb = Face.Match.FacePairMatch(_FaceMatchEngine, ref fm, ref faceModel, out score);
//Console.WriteLine(fb);
if (score > 0.85)
{
item.OrderId = DateTime.Now.Ticks;
_FaceResult.ID = item.ID;
break;
}
}
#endregion
}
}
finally
{
bitmap.UnlockBits(bmpData);
if (_RegisterClicked)
{
this.pictureBox1.Invoke(new Action(() =>
{
this.pictureBox1.Image = bitmap;
}));
_RegisterClicked = false;
}
else
{
bitmap.Dispose();
}
}
}
