Class CVTrackerBlock

Namespace

VisioForge.Core.MediaBlocks.OpenCV

Assembly

VisioForge.Core.dll

OpenCV object tracking block for continuous monitoring of moving objects in video streams. This block implements advanced tracking algorithms including KCF (Kernelized Correlation Filters), CSRT (Channel and Spatial Reliability Tracker), Median Flow, and MIL (Multiple Instance Learning) trackers. Provides robust object tracking capabilities for surveillance, sports analysis, autonomous vehicles, and interactive applications. Supports initialization from bounding boxes, adaptive model updates, and tracking confidence reporting. Essential for maintaining object identity across frames despite occlusions, scale changes, and appearance variations. Implements the VisioForge.Core.MediaBlocks.MediaBlock. Implements the VisioForge.Core.MediaBlocks.IMediaBlockInternals. Implements the IDisposable.

public class CVTrackerBlock : MediaBlock, IMediaBlock, IDisposable, IMediaBlockInternals

Inheritance

object

MediaBlock

CVTrackerBlock

Implements

IMediaBlock

IDisposable

IMediaBlockInternals

Inherited Members

MediaBlock._isBuilt

MediaBlock._pipeline

MediaBlock._pipelineCtx

MediaBlock.GetPipelineContext()

MediaBlock.SetPipelineContext(BlockPipelineContext)

MediaBlock.SetPipeline(MediaBlocksPipeline)

MediaBlock.Context

MediaBlock.Name

MediaBlock.IsBuilt

MediaBlock.Owner

MediaBlock.Type

MediaBlock.ID

MediaBlock.Input

MediaBlock.Inputs

MediaBlock.Output

MediaBlock.Outputs

MediaBlock.HasInputs

MediaBlock.HasOutputs

MediaBlock.Build()

MediaBlock.CreateElements()

MediaBlock.AddElementsToPipeline()

MediaBlock.RemoveElementsFromPipeline()

MediaBlock.DeepCopy(string)

MediaBlock.Reset()

MediaBlock.ToYAMLBlock()

MediaBlock.ClearPads()

MediaBlock.Dispose(bool)

MediaBlock.Dispose()

object.Equals(object?)

object.Equals(object?, object?)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object?, object?)

object.ToString()

Extension Methods

MediaBlockExtensions.GetInputPadByType(IMediaBlock, MediaBlockPadMediaType)

MediaBlockExtensions.GetOutputPadByType(IMediaBlock, MediaBlockPadMediaType)

MediaBlockHelper.SendEndOfStream(MediaBlock)

MediaBlockHelper.SendEvent(MediaBlock, Event)

MediaBlockHelper.SetState(MediaBlock, State)

Constructors

CVTrackerBlock(CVTrackerSettings)

Initializes a new instance of the VisioForge.Core.MediaBlocks.OpenCV.CVTrackerBlock class with the specified tracking settings.

public CVTrackerBlock(CVTrackerSettings settings)

Parameters

settings CVTrackerSettings

The tracking configuration settings containing algorithm parameters.

Properties

Input

Gets the input pad for connecting video sources to be processed.

public override MediaBlockPad Input { get; }

Property Value

MediaBlockPad

Inputs

Gets all input pads for this tracking block.

public override MediaBlockPad[] Inputs { get; }

Property Value

MediaBlockPad[]

Output

Gets the output pad for connecting to downstream processing blocks.

public override MediaBlockPad Output { get; }

Property Value

MediaBlockPad

Outputs

Gets all output pads for this tracking block.

public override MediaBlockPad[] Outputs { get; }

Property Value

MediaBlockPad[]

Settings

Gets or sets the tracking configuration settings. Defines tracking algorithms, initialization parameters, and tracking behavior options.

public CVTrackerSettings Settings { get; set; }

Property Value

CVTrackerSettings

Type

Gets the media block type identifier.

public override MediaBlockType Type { get; }

Property Value

MediaBlockType

Methods

Build()

Constructs and initializes the OpenCV tracking element within the pipeline. This method creates the tracking filter with the specified algorithm settings, establishes input and output pads, and prepares the block for object tracking.

public override bool Build()

Returns

bool

true if the tracking element was successfully built and configured; false if initialization failed.

CleanUp()

Releases all resources and performs cleanup operations for this OpenCV tracking block. This method disposes of the tracking element and resets the build state.

public void CleanUp()

Dispose(bool)

Releases unmanaged and - optionally - managed resources.

protected override void Dispose(bool disposing)

Parameters

disposing bool

true to release both managed and unmanaged resources; false to release only unmanaged resources.

GetCore()

Gets the core BaseElement wrapper that provides additional functionality around the OpenCV tracking element.

public BaseElement GetCore()

Returns

BaseElement

The BaseElement wrapper instance that encapsulates the tracking functionality.

GetElement()

Gets the underlying GStreamer element that performs the tracking operation.

public Element GetElement()

Returns

Element

The GStreamer Element instance representing the OpenCV tracking filter.

IsAvailable()

Determines whether this media block is available. Correct NuGet SDK redist should be included into your project. Checks for OpenCV library availability and object tracking algorithm support.

public static bool IsAvailable()

Returns

bool

true if OpenCV tracking functionality is available; otherwise, false.

IMediaBlockInternals.SetContext(MediaBlocksPipeline)

Associates this OpenCV tracking block with a pipeline and initializes its internal context. This method is called internally when the block is added to a pipeline.

void IMediaBlockInternals.SetContext(MediaBlocksPipeline pipeline)

Parameters

pipeline MediaBlocksPipeline

The MediaBlocksPipeline instance that will manage this block.

See Also

MediaBlock

IMediaBlockInternals

IDisposable