/// <summary>
/// Pick image and call find similar with both two modes for each faces detected
/// </summary>
/// <param name="sender">Event sender</param>
/// <param name="e">Event arguments</param>
private async void FindSimilar_Click(object sender, RoutedEventArgs e)
{
// Show file picker
Microsoft.Win32.OpenFileDialog dlg = new Microsoft.Win32.OpenFileDialog();
dlg.DefaultExt = ".jpg";
dlg.Filter = "Image files (*.jpg, *.png, *.bmp, *.gif) | *.jpg; *.png; *.bmp; *.gif";
var filePicker = dlg.ShowDialog();
if (filePicker.HasValue && filePicker.Value)
{
// User picked image
// Clear previous detection and find similar results
TargetFaces.Clear();
FindSimilarMatchPersonCollection.Clear();
FindSimilarMatchFaceCollection.Clear();
var sw = Stopwatch.StartNew();
var pickedImagePath = dlg.FileName;
var renderingImage = UIHelper.LoadImageAppliedOrientation(pickedImagePath);
var imageInfo = UIHelper.GetImageInfoForRendering(renderingImage);
SelectedFile = renderingImage;
// Detect all faces in the picked image
using (var fStream = File.OpenRead(pickedImagePath))
{
MainWindow.Log("Request: Detecting faces in {0}", SelectedFile);
MainWindow mainWindow = Window.GetWindow(this) as MainWindow;
string subscriptionKey = mainWindow._scenariosControl.SubscriptionKey;
string endpoint = mainWindow._scenariosControl.SubscriptionEndpoint;
var faceServiceClient = new FaceServiceClient(subscriptionKey, endpoint);
var faces = await faceServiceClient.DetectAsync(fStream);
// Update detected faces on UI
foreach (var face in UIHelper.CalculateFaceRectangleForRendering(faces, MaxImageSize, imageInfo))
{
TargetFaces.Add(face);
}
MainWindow.Log("Response: Success. Detected {0} face(s) in {1}", faces.Length, SelectedFile);
// Find two modes similar faces for each face
foreach (var f in faces)
{
var faceId = f.FaceId;
MainWindow.Log("Request: Finding similar faces in Personal Match Mode for face {0}", faceId);
try
{
// Default mode, call find matchPerson similar REST API, the result contains all the face ids which is personal similar to the query face
const int requestCandidatesCount = 4;
var result = await faceServiceClient.FindSimilarAsync(faceId, _faceListName, requestCandidatesCount);
// Update find matchPerson similar results collection for rendering
var personSimilarResult = new FindSimilarResult();
personSimilarResult.Faces = new ObservableCollection <Face>();
personSimilarResult.QueryFace = new Face()
{
ImageFile = SelectedFile,
Top = f.FaceRectangle.Top,
Left = f.FaceRectangle.Left,
Width = f.FaceRectangle.Width,
Height = f.FaceRectangle.Height,
FaceId = faceId.ToString(),
};
foreach (var fr in result)
{
var candidateFace = FacesCollection.First(ff => ff.FaceId == fr.PersistedFaceId.ToString());
Face newFace = new Face();
newFace.ImageFile = candidateFace.ImageFile;
newFace.Confidence = fr.Confidence;
newFace.FaceId = candidateFace.FaceId;
personSimilarResult.Faces.Add(newFace);
}
MainWindow.Log("Response: Found {0} similar faces for face {1}", personSimilarResult.Faces.Count, faceId);
FindSimilarMatchPersonCollection.Add(personSimilarResult);
}
catch (FaceAPIException ex)
{
MainWindow.Log("Response: {0}. {1}", ex.ErrorCode, ex.ErrorMessage);
}
try
{
// Call find facial match similar REST API, the result faces the top N with the highest similar confidence
const int requestCandidatesCount = 4;
var result = await faceServiceClient.FindSimilarAsync(faceId, _faceListName, FindSimilarMatchMode.matchFace, requestCandidatesCount);
// Update "matchFace" similar results collection for rendering
var faceSimilarResults = new FindSimilarResult();
faceSimilarResults.Faces = new ObservableCollection <Face>();
faceSimilarResults.QueryFace = new Face()
{
ImageFile = SelectedFile,
Top = f.FaceRectangle.Top,
Left = f.FaceRectangle.Left,
Width = f.FaceRectangle.Width,
Height = f.FaceRectangle.Height,
FaceId = faceId.ToString(),
};
foreach (var fr in result)
{
var candidateFace = FacesCollection.First(ff => ff.FaceId == fr.PersistedFaceId.ToString());
Face newFace = new Face();
newFace.ImageFile = candidateFace.ImageFile;
newFace.Confidence = fr.Confidence;
newFace.FaceId = candidateFace.FaceId;
faceSimilarResults.Faces.Add(newFace);
}
MainWindow.Log("Response: Found {0} similar faces for face {1}", faceSimilarResults.Faces.Count, faceId);
FindSimilarMatchFaceCollection.Add(faceSimilarResults);
}
catch (FaceAPIException ex)
{
MainWindow.Log("Response: {0}. {1}", ex.ErrorCode, ex.ErrorMessage);
}
}
}
}
GC.Collect();
}
