Class LegacyTracker

Namespace

OpenCvSharp.Tracking.Legacy

Assembly

OpenCvSharp.dll

Base abstract class for the long-term tracker, mirroring cv::legacy::Tracker.

public abstract class LegacyTracker : Algorithm, IDisposable

Inheritance

object

CvObject

CvPtrObject

Algorithm

LegacyTracker

Implements

IDisposable

Derived

TrackerBoosting

TrackerCSRT

TrackerKCF

TrackerMIL

TrackerMOSSE

TrackerMedianFlow

TrackerTLD

Inherited Members

Algorithm.Write(FileStorage)

Algorithm.Read(FileNode)

Algorithm.Empty

Algorithm.Save(string)

Algorithm.GetDefaultName()

CvPtrObject.RawPtr

CvObject.IsDisposed

CvObject.ptr

CvObject.SetSafeHandle(OpenCvSafeHandle)

CvObject.Dispose()

CvObject.Dispose(bool)

CvObject.DisposeManaged()

CvObject.DisposeUnmanaged()

CvObject.ThrowIfDisposed()

CvObject.CvPtr

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

object.ToString()

Remarks

This is a distinct type from Tracker (the modern, video-module tracker base): cv::legacy::Tracker::init/update return bool (not void) and operate on Rect2d (not Rect), so the two hierarchies cannot share a common managed base class.

Constructors

LegacyTracker(nint, nint, Action<nint>)

Constructor for the factory pattern (cv::Ptr<T>* + raw T*).

protected LegacyTracker(nint smartPtr, nint rawPtr, Action<nint> releaseSmartPtr)

Parameters

smartPtr nint

rawPtr nint

releaseSmartPtr Action<nint>

Methods

Init(Mat, Rect2d)

Initialize the tracker with a known bounding box that surrounded the target.

public bool Init(Mat image, Rect2d boundingBox)

Parameters

image Mat

The initial frame

boundingBox Rect2d

The initial bounding box

Returns

bool

True if initialization went successfully, false otherwise

Update(Mat, ref Rect2d)

Update the tracker, find the new most likely bounding box for the target.

public bool Update(Mat image, ref Rect2d boundingBox)

Parameters

image Mat

The current frame

boundingBox Rect2d

The bounding box that represents the new target location, if true was returned, not modified otherwise

Returns

bool

True means that target was located and false means that tracker cannot locate target in the current frame. Note that the latter does not imply that tracker has failed - the target may indeed be missing from the frame (say, out of sight).