public override async Task InitAsync()
{
await ExecuteAsync(async() =>
{
FacePhoto = "face_default";
_persons = await FaceApiService.GetPersons();
});
}
public override async Task InitAsync()
{
await ExecuteAsync(async() =>
{
var persons = await FaceApiService.GetPersons();
Persons = new ObservableCollection <Person>(persons);
});
}
public override async Task InitAsync()
{
await ExecuteAsync(async() =>
{
HasToShowPicker = true;
var persons = await FaceApiService.GetPersons();
Persons = new ObservableCollection <Person>(persons);
PersonSelected = persons?.FirstOrDefault();
});
}
async Task <bool> IsValidPhoto()
{
var facesDetected = await FaceApiService.DetectFaces(GetByteArray(_photo));
if (facesDetected == null || facesDetected.Count == 0)
{
await Application.Current.MainPage.DisplayAlert(
"Foto no válida",
"No hemos detectado ninguna cara en la foto que has tomado. Saca una foto en la que salga tu cara.",
"Ok");
return(false);
}
else if (facesDetected.Count == 1)
{
var persons = await FaceApiService.GetPersons();
foreach (var face in facesDetected)
{
bool existsFaceId = persons.FirstOrDefault(person => person.PersistedFaceIds.Contains(face.FaceId)) != null;
if (existsFaceId)
{
await Application.Current.MainPage.DisplayAlert(
"Foto no válida",
$"En el grupo {_personGroup.Name} ya hay una persona creada asociada a la cara a la que le has sacado la foto.",
"Ok");
return(false);
}
}
}
else
{
foreach (var face in facesDetected)
{
await Application.Current.MainPage.DisplayAlert(
"Foto no válida",
"En la foto sólo puede haber una cara",
"Ok");
return(false);
}
}
return(true);
}
async Task OnAddImage()
{
await ExecuteAsync(async() =>
{
await CheckPermissionAndAskIfIsNeeded(Permission.Camera);
await CheckPermissionAndAskIfIsNeeded(Permission.Storage);
_photo = await GetFacePhotoTaked();
if (_photo == null)
{
return;
}
PhotoTaked = _photo.Path;
byte[] byteArray = GetByteArray(_photo);
var detectResults = await FaceApiService.DetectFaces(byteArray);
if (!(await IsPhotoValid(detectResults)))
{
return;
}
var identifyResults = await FaceApiService.Identify(new IdentifyFaceRequest()
{
FaceIds = detectResults.Select(x => x.FaceId).ToList(),
MaxNumOfCandidatesReturned = 10,
PersonGroupId = _personGroup.PersonGroupId,
ConfidenceThreshold = 0.5
});
var persons = await FaceApiService.GetPersons();
if (detectResults == null || identifyResults == null || persons == null)
{
return;
}
FacesDetected = identifyResults.Select(res => new FaceDetectedItemViewModel()
{
FaceId = res.FaceId,
FaceRectangle = detectResults.FirstOrDefault(detResults => detResults.FaceId == res.FaceId).FaceRectangle,
FaceAttributes = detectResults.FirstOrDefault(detResults => detResults.FaceId == res.FaceId).FaceAttributes,
PersonName = persons?.FirstOrDefault(p => p.PersonId == res.Candidates?.FirstOrDefault(cand => cand.PersonId == p.PersonId)?.PersonId)?.Name
}).ToList();
});
}