//Selecting a Picture from Disk
private async void UploadPictureButton_Clicked(object sender, EventArgs e)
{
if (!CrossMedia.Current.IsPickPhotoSupported)
{
await DisplayAlert("No upload", "Picking a photo is not supported.", "OK");
return;
}
var file = await CrossMedia.Current.PickPhotoAsync();
if (file == null)
{
return;
}
this.Indicator1.IsVisible = true;
this.Indicator1.IsRunning = true;
Image1.Source = ImageSource.FromStream(() => file.GetStream());
FaceEmotionDetection theData = await DetectFaceAndEmotionsAsync(file);
this.BindingContext = theData;
this.Indicator1.IsRunning = false;
this.Indicator1.IsVisible = false;
}
//Taking a Picture with the Camera
private async void TakePictureButton_Clicked(object sender, EventArgs e)
{
await CrossMedia.Current.Initialize();
if (!CrossMedia.Current.IsCameraAvailable || !CrossMedia.Current.
IsTakePhotoSupported)
{
await DisplayAlert("No Camera", "No camera available.", "OK");
return;
}
var file = await CrossMedia.Current.TakePhotoAsync(new StoreCameraMediaOptions
{
SaveToAlbum = true,
Name = "test.jpg"
});
if (file == null)
{
return;
}
this.Indicator1.IsVisible = true;
this.Indicator1.IsRunning = true;
Image1.Source = ImageSource.FromStream(() => file.GetStream());
FaceEmotionDetection theData = await DetectFaceAndEmotionsAsync(file);
this.BindingContext = theData;
this.Indicator1.IsRunning = false;
this.Indicator1.IsVisible = false;
}
private async Task <FaceEmotionDetection> DetectFaceAndEmotionsAsync(MediaFile inputFile)
{
if (!CrossConnectivity.Current.IsConnected)
{
await DisplayAlert("Network error", "Please check your network connection and retry.", "OK");
return(null);
}
try
{
// Get emotions from the specified stream
Emotion[] emotionResult = await emotionServiceClient.
RecognizeAsync(inputFile.GetStream());
// Assuming the picture has one face, retrieve emotions for the
// first item in the returned array
var faceEmotion = emotionResult[0]?.Scores.ToRankedList();
// Create a list of face attributes that the
// app will need to retrieve
var requiredFaceAttributes = new FaceAttributeType[] {
FaceAttributeType.Age,
FaceAttributeType.Gender,
FaceAttributeType.Smile,
FaceAttributeType.FacialHair,
FaceAttributeType.HeadPose,
FaceAttributeType.Glasses
};
// Get a list of faces in a picture
var faces = await faceServiceClient.
DetectAsync(inputFile.GetStream(),
false, false, requiredFaceAttributes);
// Assuming there is only one face, store its attributes
var faceAttributes = faces[0]?.FaceAttributes;
if (faceEmotion == null || faceAttributes == null)
{
return(null);
}
FaceEmotionDetection faceEmotionDetection = new FaceEmotionDetection();
faceEmotionDetection.Age = faceAttributes.Age;
faceEmotionDetection.Emotion = faceEmotion.FirstOrDefault().Key;
faceEmotionDetection.Glasses = faceAttributes.Glasses.ToString();
faceEmotionDetection.Smile = faceAttributes.Smile;
faceEmotionDetection.Gender = faceAttributes.Gender;
faceEmotionDetection.Moustache = faceAttributes.FacialHair.Moustache;
faceEmotionDetection.Beard = faceAttributes.FacialHair.Beard;
return(faceEmotionDetection);
}
catch (Exception ex)
{
await DisplayAlert("Error", ex.Message, "OK");
return(null);
}
}