This protocol defines an interface for the delegates of HandLandmarker object to receive
results of performing asynchronous hand landmark detection on images (i.e, when
runningMode = .liveStream).
The delegate of HandLandmarker must adopt HandLandmarkerLiveStreamDelegate protocol.
The methods in this protocol are optional.
The hand landmarker which performed the hand landmarking.
This is useful to test equality when there are multiple instances of HandLandmarker.
result
The HandLandmarkerResult object that contains a list of detections, each
detection has a bounding box that is expressed in the unrotated input frame of reference
coordinates system, i.e. in [0,image_width) x [0,image_height), which are the dimensions of the
underlying image data.
timestampInMilliseconds
The timestamp (in milliseconds) which indicates when the input
image was sent to the hand landmarker.
error
An optional error parameter populated when there is an error in performing hand
landmark detection on the input live stream image data.