Added Class Library FaceRecognitionDotNet

FaceRecognitionDotNet/Extensions/FaceDetector.cs

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+using DlibDotNet;
+using View_by_Distance.Shared.Models;
+
+namespace View_by_Distance.FaceRecognitionDotNet.Extensions;
+
+/// <summary>
+/// An abstract base class that provides functionality to detect face locations from image.
+/// </summary>
+public abstract class FaceDetector : DisposableObject
+{
+
+    #region Methods
+
+    internal IEnumerable<Location> Detect(Image image, int numberOfTimesToUpsample) => RawDetect(image.Matrix, numberOfTimesToUpsample);
+
+    /// <summary>
+    /// Returns an enumerable collection of face location correspond to all faces in specified image.
+    /// </summary>
+    /// <param name="matrix">The matrix contains a face.</param>
+    /// <param name="numberOfTimesToUpsample">The number of times to up-sample the image when finding faces.</param>
+    /// <returns>An enumerable collection of face location correspond to all faces.</returns>
+    protected abstract IEnumerable<Location> RawDetect(MatrixBase matrix, int numberOfTimesToUpsample);
+
+    #endregion
+
+}