/// <summary>
/// 根据locate数据，从图片中提供人脸特征，先执行 FaceLocateResult() 获得图片的人脸特征
/// </summary>
/// <param name="bitmap">图片</param>
/// <param name="locate">图片中的人脸数据</param>
/// <returns>返回一个人脸特征，适用于图片中只有一个人脸的情况</returns>
public Feature GetFaceFeature(Bitmap bitmap, LocateResult locate)
{
Feature feature = null;
var result = _detection.Detect(bitmap, out var locateResult);
if (result == Stepon.FaceRecognization.Common.ErrorCode.Ok && locateResult.HasFace)
{
using (_recognize = new FaceRecognize(AppConfigurations.AppId, AppConfigurations.FrKey))
{
feature = _recognize.ExtractFeature(locate.OffInput, locate.Faces[0], locate.FacesOrient[0]);
}
}
return(feature);
}
private void WriteFeature(Bitmap bitmap)
{
var code = _detection.Detect(bitmap, out var locate);
try
{
if (code == ErrorCode.Ok)
{
if (locate.HasFace)
{
if (locate.FaceCount > 1)
{
MessageBox.Show("选定的图片检测到多余一张的人脸，请重新选择");
return;
}
var name = userIdentity.Text;
using (var feature =
_recognize.ExtractFeature(locate.OffInput, locate.Faces[0], locate.FacesOrient[0]))
{
if (!Directory.Exists(FaceLibraryPath))
{
Directory.CreateDirectory(FaceLibraryPath);
}
File.WriteAllBytes(Path.Combine(FaceLibraryPath, $"{name}.dat"), feature.FeatureData);
try
{
_cacheLock.EnterWriteLock();
_cache.Add(name, feature.FeatureData);
}
finally
{
_cacheLock.ExitWriteLock();
}
}
userIdentity.Text = "";
}
}
else
{
MessageBox.Show(code.ToString());
}
}
catch (Exception error)
{
MessageBox.Show(error.Message);
}
finally
{
locate.Dispose();
}
MessageBox.Show("建立特征成功");
}