public async Task SaveResultImageAsync()
{
var rtb = new RenderTargetBitmap();
await rtb.RenderAsync(ResultControl);
var pixelBuffer = await rtb.GetPixelsAsync();
var displayInformation = DisplayInformation.GetForCurrentView();
var file = await PicturesHelper.SaveResultBufferAsync(pixelBuffer, rtb.PixelWidth, rtb.PixelHeight, displayInformation.RawDpiX, displayInformation.RawDpiY);
GameStateMachineVm.ResultImage = new BitmapImage(new Uri(file.Path));
}
public static async Task <IdentifiedFace> CheckGroupAsync(FaceServiceClient faceClient, Stream stream, string personGroupId, string groupImagesFolder)
{
try
{
var response = await FaceApiHelper.IdentifyPersonAsync(faceClient, stream, personGroupId);
if (response?.Candidates == null || response.Candidates.Length == 0)
{
return(null);
}
// Due to legal limitations, Face API does not support images retrieval in any circumstance currently.You need to store the images and maintain the relationship between face ids and images by yourself.
var personsFolder = await PicturesHelper.GetPersonFolderAsync(groupImagesFolder);
var dataSet = await faceClient.ListPersonsAsync(personGroupId);
var matches =
from c in response.Candidates
join p in dataSet on c.PersonId equals p.PersonId into ps
from p in ps.DefaultIfEmpty()
select new IdentifiedFace
{
Confidence = c.Confidence,
PersonName = p == null ? "(No matching face)" : p.Name,
FaceId = c.PersonId
};
var match = matches.OrderByDescending(m => m.Confidence).FirstOrDefault();
if (match == null)
{
return(null);
}
var matchFile = await personsFolder.GetFileAsync($"{match.PersonName}.{Constants.LocalPersonFileExtension}");
IRandomAccessStream photoStream = await matchFile.OpenReadAsync();
match.FaceStream = photoStream.CloneStream().AsStream();
return(match);
}
catch (Exception)
{
return(null);
}
}