小编Jos*_*ham的帖子

我可以从Live Web Cam获得面孔作为Windows.Media.FaceAnalysis DetectedFace对象列表。现在，我想将这些面孔传递给Microsoft Cognitive Services API，以检测面孔并获取面孔属性。我怎样才能做到这一点？

IList<DetectedFace> faces = null;

// Create a VideoFrame object specifying the pixel format we want our capture image to be (NV12 bitmap in this case).
// GetPreviewFrame will convert the native webcam frame into this format.
const BitmapPixelFormat InputPixelFormat = BitmapPixelFormat.Nv12;
using (VideoFrame previewFrame = new VideoFrame(InputPixelFormat, (int)this.videoProperties.Width, (int)this.videoProperties.Height))
{
    await this.mediaCapture.GetPreviewFrameAsync(previewFrame);

    // The returned VideoFrame should be in the supported NV12 format but we need to verify this.
    if (FaceDetector.IsBitmapPixelFormatSupported(previewFrame.SoftwareBitmap.BitmapPixelFormat)) …