MediaPipeTasksVision Framework Reference

MPPImageClassifierLiveStreamDelegate

@protocol MPPImageClassifierLiveStreamDelegate <NSObject>

This protocol defines an interface for the delegates of ImageClassifier object to receive results of asynchronous classification of images (i.e, when runningMode = .liveStream).

The delegate of ImageClassifier must adopt ImageClassifierLiveStreamDelegate protocol. The methods in this protocol are optional.

  • This method notifies a delegate that the results of asynchronous classification of an image submitted to the ImageClassifier is available.

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

    Declaration

    Objective-C

    - (void)imageClassifier:(nonnull MPPImageClassifier *)imageClassifier
    didFinishClassificationWithResult:
        (nullable MPPImageClassifierResult *)result
              timestampInMilliseconds:(NSInteger)timestampInMilliseconds
                                error:(nullable NSError *)error;

    Parameters

    imageClassifier

    The image classifier which performed the classification. This is useful to test equality when there are multiple instances of ImageClassifier.
    result

    An ImageClassifierResult object that contains a list of image classifications.
    timestampInMilliseconds

    The timestamp (in milliseconds) which indicates when the input image was sent to the image classifier.
    error

    An optional error parameter populated when there is an error in performing image classification on the input live stream image data.