/// <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
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 file in files)
{
Debug.WriteLine("BuildWhiteList: Processing " + file.Path);
try
{
var faceId = await DetectFaceFromImage(file);
await AddFace(personId, faceId, file.Path);
Debug.WriteLine("This image added to whitelist successfully!");
}
catch (FaceRecognitionException fe)
{
switch (fe.ExceptionType)
{
case FaceRecognitionExceptionType.InvalidImage:
Debug.WriteLine("WARNING: This file is not a valid image!");
break;
case FaceRecognitionExceptionType.NoFaceDetected:
Debug.WriteLine("WARNING: No face detected in this image");
break;
case FaceRecognitionExceptionType.MultipleFacesDetected:
Debug.WriteLine("WARNING: Multiple faces detected, ignored this image");
break;
}
}
// update progress
progressCnt += progressStep;
UpdateProgress(progress, progressCnt);
}
}
await TrainingWhitelistAsync();
Debug.WriteLine("Whitelist created successfully!");
}
