Class EyeAspectRatioBaseEyeBlinkDetector

Namespace

FaceRecognitionDotNet.Extensions

Assembly

VisioForge.Core.FaceAI.dll

An abstract base class that provides functionality to detect human eye's blink base on eye aspect ratio (EAR).

public abstract class EyeAspectRatioBaseEyeBlinkDetector : EyeBlinkDetector, IDisposable

Inheritance

object

DisposableObject

EyeBlinkDetector

EyeAspectRatioBaseEyeBlinkDetector

Derived

EyeAspectRatioHelenEyeBlinkDetector

EyeAspectRatioLargeEyeBlinkDetector

Implements

IDisposable

Inherited Members

EyeBlinkDetector.RawDetect(IDictionary<FacePart, IEnumerable<FacePoint>>, out bool, out bool)

DisposableObject.IsDisposed

DisposableObject.ThrowIfDisposed()

DisposableObject.DisposeManaged()

DisposableObject.DisposeUnmanaged()

DisposableObject.Dispose()

DisposableObject.Dispose(bool)

object.Equals(object?)

object.Equals(object?, object?)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object?, object?)

object.ToString()

Constructors

EyeAspectRatioBaseEyeBlinkDetector(double, double, int[], int[])

Initializes a new instance of the FaceRecognitionDotNet.Extensions.EyeAspectRatioBaseEyeBlinkDetector class with the threshold and eye point indices for left and right eyes.

protected EyeAspectRatioBaseEyeBlinkDetector(double leftRatioThreshold, double rightRatioThreshold, int[] leftEyePointIndices, int[] rightEyePointIndices)

Parameters

leftRatioThreshold double

The threshold to decide that left eye blinks or not.

rightRatioThreshold double

The threshold to decide that right eye blinks or not.

leftEyePointIndices int[]

The indices of left eye location to calculate eye aspect ratio.

rightEyePointIndices int[]

The indices of right eye location to calculate eye aspect ratio.

Exceptions

ArgumentNullException

leftEyePointIndices or rightEyePointIndices is null.

ArgumentException

leftEyePointIndices or rightEyePointIndices does not contain 6 elements.

Properties

LeftEyePointIndices

Gets the array of the indices of left eye location to be used calculating eye aspect ratio.

protected int[] LeftEyePointIndices { get; }

Property Value

int[]

LeftRatioThreshold

Gets the threshold to decide that left eye blinks or not.

public double LeftRatioThreshold { get; }

Property Value

double

RightEyePointIndices

Gets the array of the indices of right eye location to be used calculating eye aspect ratio.

protected int[] RightEyePointIndices { get; }

Property Value

int[]

RightRatioThreshold

Gets the threshold to decide that right eye blinks or not.

public double RightRatioThreshold { get; }

Property Value

double

Methods

GetEar(IList<FacePoint>, IList<int>)

Return an eye aspect ratio.

protected double GetEar(IList<FacePoint> eye, IList<int> eyePointIndices)

Parameters

eye IList<FacePoint>

The collection of location corresponding to human eye.

eyePointIndices IList<int>

The collection of the indices of eye location to be used calculating eye aspect ratio.

Returns

double

Eye aspect ratio.

RawDetect(IDictionary<FacePart, IEnumerable<FacePoint>>, out bool, out bool)

Detects the values whether human eye's blink or not from face landmark.

protected override void RawDetect(IDictionary<FacePart, IEnumerable<FacePoint>> landmark, out bool leftBlink, out bool rightBlink)

Parameters

landmark IDictionary<FacePart, IEnumerable<FacePoint>>

The dictionary of face parts locations (eyes, nose, etc).

leftBlink bool

When this method returns, contains true, if the left eye blinks; otherwise, false.

rightBlink bool

When this method returns, contains true, if the right eye blinks; otherwise, false.

Exceptions

ArgumentNullException

landmark is null.

ArgumentException

landmark does not contain FaceRecognitionDotNet.FacePart.LeftEye or FaceRecognitionDotNet.FacePart.RightEye.