MediaPipeTasksVision Framework Reference

MPPFaceLandmarkerLiveStreamDelegate

@protocol MPPFaceLandmarkerLiveStreamDelegate <NSObject>

This protocol defines an interface for the delegates of FaceLandmarker face to receive results of performing asynchronous face detection on images (i.e, when runningMode = .liveStream).

The delegate of FaceLandmarker must adopt FaceLandmarkerLiveStreamDelegate protocol. The methods in this protocol are optional.

• -faceLandmarker:didFinishDetectionWithResult:timestampInMilliseconds:error:

  This method notifies a delegate that the results of asynchronous face detection of an image submitted to the FaceLandmarker is available.

  This method is called on a private serial dispatch queue created by the FaceLandmarker for performing the asynchronous delegates calls.

  Declaration

  Objective-C

  - (void)faceLandmarker:(nonnull MPPFaceLandmarker *)faceLandmarker
      didFinishDetectionWithResult:(nullable MPPFaceLandmarkerResult *)result
           timestampInMilliseconds:(NSInteger)timestampInMilliseconds
                             error:(nullable NSError *)error;

  Parameters

  faceLandmarker	The face landmarker which performed the face landmark detctions. This is useful to test equality when there are multiple instances of FaceLandmarker.
  result	The FaceLandmarkerResult object that contains a list of landmarks.
  timestampInMilliseconds	The timestamp (in milliseconds) which indicates when the input image was sent to the face detector.
  error	An optional error parameter populated when there is an error in performing face detection on the input live stream image data.