Пример #1
0
        public async void ProcessCurrentVideoFrame(ThreadPoolTimer timer)
        {
            if (!_frameProcessingSemaphore.Wait(0))
            {
                return;
            }

            var latestFrame = await _camera.GetLatestFrame();

            SoftwareBitmap currentFrame = latestFrame as SoftwareBitmap;

            // Use FaceDetector.GetSupportedBitmapPixelFormats and IsBitmapPixelFormatSupported to dynamically
            // determine supported formats
            const BitmapPixelFormat faceDetectionPixelFormat = BitmapPixelFormat.Nv12;

            if (currentFrame == null || currentFrame.BitmapPixelFormat != faceDetectionPixelFormat)
            {
                _frameProcessingSemaphore.Release();
                return;
            }

            try
            {
                IList <DetectedFace> detectedFaces = await _faceDetector.DetectFacesAsync(currentFrame);

                if (detectedFaces.Count == 0)
                {
                    NoFaceDetected?.Invoke(this, null);
                }
                else if (detectedFaces.Count != _detectedFacesInLastFrame)
                {
                    OnPreAnalysis?.Invoke(this, null);

                    var bytes = await _camera.GetEncodedBytesAsync(currentFrame);

                    var output = await AnalysisFunction(bytes);// currentFrame.SoftwareBitmap.ToByteArray());

                    UsersIdentified?.Invoke(this, output);
                }

                _detectedFacesInLastFrame = detectedFaces.Count;
            }
            catch (Exception ex)
            {
                // Face tracking failed
                Debug.WriteLine(ex);
            }
            finally
            {
                _frameProcessingSemaphore.Release();
            }

            currentFrame.Dispose();
        }
Пример #2
0
        public async void ProcessCurrentVideoFrame(Timer timer)
        {
            OnPreAnalysis?.Invoke(this, null);

            var p = await Package.Current.InstalledLocation.GetFolderAsync(@"Assets");

            var uri = p.Path + "/untitled.png";

            var array = File.ReadAllBytes(uri);

            var output = await AnalysisFunction(array);

            UsersIdentified?.Invoke(this, output);
        }