public async Task <IEnumerable <PhotoFace> > FindPeople(IRandomAccessStream stream)
{
Face[] faces = null;
IdentifyResult[] results = null;
List <PhotoFace> photoFaces = new List <PhotoFace>();
try
{
// find all faces
faces = await _client.DetectAsync(stream.AsStream());
// no faces found
if (faces.Count() == 0)
{
return(photoFaces);
}
if (await CheckIfGroupExistsAsync())
{
results = await _client.IdentifyAsync(_groupId, faces.Select(f => f.FaceId).ToArray());
}
for (var i = 0; i < faces.Length; i++)
{
var face = faces[i];
var photoFace = new PhotoFace()
{
Rect = face.FaceRectangle,
Identified = false
};
if (results != null)
{
var result = results[i];
if (result.Candidates.Length > 0)
{
photoFace.PersonId = result.Candidates[0].PersonId;
photoFace.Name = _personList.Where(p => p.PersonId == result.Candidates[0].PersonId).FirstOrDefault()?.Name;
photoFace.Identified = true;
}
}
photoFaces.Add(photoFace);
}
}
catch (FaceAPIException ex)
{
}
return(photoFaces);
}
public async Task <bool> AddImageForPerson(PhotoFace photoFace, IRandomAccessStream stream)
{
if (photoFace == null || photoFace.Name == null)
{
return(false);
}
bool trained = false;
// create group
try
{
if (!await CheckIfGroupExistsAsync())
{
await _client.CreatePersonGroupAsync(_groupId, _groupId);
}
if (photoFace.PersonId == null || _personList == null || !_personList.Any(p => p.PersonId == photoFace.PersonId))
{
photoFace.PersonId = (await _client.CreatePersonAsync(_groupId, photoFace.Name)).PersonId;
}
await _client.AddPersonFaceAsync(_groupId, photoFace.PersonId, stream.AsStream(), targetFace : photoFace.Rect);
await _client.TrainPersonGroupAsync(_groupId);
while (!trained)
{
await Task.Delay(1000);
var status = await _client.GetPersonGroupTrainingStatusAsync(_groupId);
switch (status.Status)
{
case Status.Succeeded:
trained = true;
break;
case Status.Failed:
return(false);
}
}
_personList = await _client.GetPersonsAsync(_groupId);
return(true);
}
catch (FaceAPIException ex)
{
return(false);
}
}