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.

  • 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.