/// <summary>
/// Add face to both Cloud Face API and local whitelist
/// </summary>
/// <param name="personId"></param>
/// <param name="faceId"></param>
/// <param name="imagePath"></param>
/// <returns></returns>
private async Task AddFace(Guid personId, Guid faceId, string imagePath)
{
// prevent running synchronous call on UI thread
await Task.Run(async() =>
{
using (Stream imageStream = File.OpenRead(imagePath))
{
AddPersistedFaceResult result = await _faceApiClient.AddPersonFaceAsync(WhitelistId, personId, imageStream);
}
_whitelist.AddFace(personId, faceId, imagePath);
});
}
/// <summary>
/// Add face to both Cloud Face API and local whitelist
/// </summary>
/// <param name="personId"></param>
/// <param name="faceId"></param>
/// <param name="imagePath"></param>
/// <returns></returns>
private async Task AddFace(Guid personId, Guid faceId, string imagePath)
{
await Task.Run(async() =>
{
using (Stream imageStream = File.OpenRead(imagePath))
{
await _faceApiClient.AddPersonFaceAsync(WhitelistId, personId, imageStream);
}
});
_whitelist.AddFace(personId, faceId, imagePath);
}
/// <summary>
/// Add face to both Cloud Face API and local whitelist
/// </summary>
/// <param name="personId"></param>
/// <param name="faceId"></param>
/// <param name="imagePath"></param>
/// <returns></returns>
private async Task AddFace(Guid personId, Guid faceId, string imagePath)
{
await _faceApiClient.AddPersonFaceAsync(WhitelistId, personId, faceId, imagePath);
_whitelist.AddFace(personId, faceId, imagePath);
}
/// <summary>
/// Use whitelist folder to build whitelist Database
/// </summary>
/// <returns></returns>
private async Task BuildWhiteListAsync(IProgress <int> progress, double progressCnt)
{
Debug.WriteLine("Start building whitelist from " + _whitelistFolder.Path);
// calc progress step
var fileCnt = await FaceApiUtils.GetFileCountInWhitelist(_whitelistFolder);
var progressStep = (100.0 - progressCnt) / fileCnt;
var subFolders = await _whitelistFolder.GetFoldersAsync();
// Iterate all subfolders in whitelist
List <Task> tasks = new List <Task>();
foreach (var folder in subFolders)
{
var personName = folder.Name;
// create new person
var personId = await CreatePerson(personName, folder);
// get all images in the folder
var files = await folder.GetFilesAsync();
// iterate all images and add to whitelist
foreach (var img in await folder.GetFilesAsync())
{
tasks.Add(StartAddFaceImageTask(img, personId).Unwrap().ContinueWith((taskDone) =>
{
var detectTask = taskDone as Task <Tuple <string, ClientContract.AddPersistedFaceResult> >;
if (detectTask == null)
{
return;
}
// Update something on UI
var faceDetectionResult = detectTask.Result;
if (faceDetectionResult != null && faceDetectionResult.Item2 != null && faceDetectionResult.Item1 != null)
{
_whitelist.AddFace(personId, faceDetectionResult.Item2.PersistedFaceId, faceDetectionResult.Item1);
}
else
{
return;
}
// update progress
progressCnt += progressStep;
UpdateProgress(progress, progressCnt);
}
));
}
await Task.WhenAll(tasks);
}
await Task.WhenAll(tasks);
await TrainingWhitelistAsync();
Debug.WriteLine("Whitelist created successfully!");
}
