添加项目文件。

Program.cs

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+// See https://aka.ms/new-console-template for more information
+using DlibDotNet;
+using OpenCvSharp;
+using System.Runtime.InteropServices;
+using Point = OpenCvSharp.Point;
+using System.Numerics;
+using System.Diagnostics;
+
+// define two constants, one for the eye aspect ratio to indicate
+// blink and then a second constant for the number of consecutive
+// frames the eye must be below the threshold
+var EYE_AR_THRESH = 0.2;
+var EYE_AR_CONSEC_FRAMES = 1;
+// initialize the frame counters and the total number of blinks
+var COUNTER = 0;
+var TOTAL = 0;
+
+VideoCapture cap = new(0);
+using (var detector = Dlib.GetFrontalFaceDetector())
+// 加载人脸68特征点检测模型
+using (var sp = ShapePredictor.Deserialize("Resource/shape_predictor_68_face_landmarks.dat"))
+    while (cap.IsOpened())
+    {
+        using var frameMat = cap.RetrieveMat();
+        byte[] array = new byte[frameMat.Width * frameMat.Height * frameMat.ElemSize()];
+        Marshal.Copy(frameMat.Data, array, 0, array.Length);
+
+        using var cimg = Dlib.LoadImageData<RgbPixel>(array, (uint)frameMat.Height, (uint)frameMat.Width, (uint)(frameMat.Width * frameMat.ElemSize()));
+        var dets = detector.Operator(cimg);
+
+        var shapes = new List<FullObjectDetection>();
+        foreach (var rect in dets)
+        {
+            // 画出检测到的脸的矩形框
+            frameMat.Rectangle(new Rect(rect.Left, rect.Top, (int)rect.Width, (int)rect.Height), new Scalar(255, 0, 0));
+            var shape = sp.Detect(cimg, rect);
+            var eye1 = new Vector2[6];
+            var eye2 = new Vector2[6];
+            for (uint i = 0; i < shape.Parts; i++)
+            {
+                var point = shape.GetPart(i);
+                // 获取第一只眼睛
+                if (i >= 36 && i < 42)
+                {
+                    eye1[i - 36] = new Vector2(point.X, point.Y);
+                }
+                // 获取第二只眼睛
+                if (i >= 42 && i < 48)
+                {
+                    eye2[i - 42] = new Vector2(point.X, point.Y);
+                }
+
+                // 画出检测到的脸的68特征点
+                frameMat.Circle(point.X, point.Y, 1, new Scalar(0, 255, 0));
+                //  frameMat.PutText(i.ToString(), new Point(point.X, point.Y), HersheyFonts.HersheySimplex, 0.3, new Scalar(0, 255, 0));
+            }
+
+            var EAR1 = eyeAspectRatio(eye1);
+            var EAR2 = eyeAspectRatio(eye2);
+            // average the eye aspect ratio together for both eyes
+            var ear = (EAR1 + EAR2) / 2.0;
+            frameMat.PutText(string.Format("EAR: {0:N2}", ear), new Point(300, 30), HersheyFonts.HersheySimplex, 0.7, new Scalar(0, 0, 255), 2);
+            // check to see if the eye aspect ratio is below the blink
+            // threshold, and if so, increment the blink frame counter
+            if (ear < EYE_AR_THRESH)
+            {
+                COUNTER += 1;
+                Debug.WriteLine(ear);
+            }
+            // otherwise, the eye aspect ratio is not below the blink
+            // threshold
+            else
+            {
+                //if the eyes were closed for a sufficient number of
+                // then increment the total number of blinks
+                if (COUNTER >= EYE_AR_CONSEC_FRAMES)
+                    TOTAL += 1;
+                // reset the eye frame counter
+                COUNTER = 0;
+            }
+        }
+
+        frameMat.PutText(string.Format("Blinks: {0}", TOTAL), new Point(10, 30), HersheyFonts.HersheySimplex, 0.7, new Scalar(0, 0, 255), 2);
+
+        Cv2.ImShow("img", frameMat);
+
+        Cv2.WaitKey(50);
+    }
+
+static double eyeAspectRatio(Vector2[] eye)
+{
+    // compute the euclidean distances between the two sets of
+    // vertical eye landmarks (x, y)-coordinates
+    var A = Vector2.Distance(eye[1], eye[5]);
+    var B = Vector2.Distance(eye[2], eye[4]);
+    // compute the euclidean distance between the horizontal
+    // eye landmark (x, y)-coordinates
+    var C = Vector2.Distance(eye[0], eye[3]);
+    // compute the eye aspect ratio
+    var ear = (A + B) / (2.0 * C);
+    // return the eye aspect ratio
+    return ear;
+}

README.md

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+# 眨眼检测c#(.net6) 
+* 利用 [眼睛纵横比（EAR）](http://vision.fe.uni-lj.si/cvww2016/proceedings/papers/05.pdf?spm=a2c6h.12873639.article-detail.9.7cba3329OtWn6S&file=05.pdf)来进行眨眼算法
+* 使用 [dlib](https://github.com/davisking/dlib) 进行人脸以及68特征点检测

blink.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="DlibDotNet" Version="19.21.0.20220724" />
+    <PackageReference Include="OpenCvSharp4.Windows" Version="4.6.0.20220608" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <None Update="Resource\shape_predictor_68_face_landmarks.dat">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
+    <None Update="shape_predictor_68_face_landmarks.dat.bz2">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
+  </ItemGroup>
+
+</Project>

blink.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.3.32825.248
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "blink", "blink.csproj", "{2D57E00A-0052-4A83-BE0C-92118E0A393D}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{2D57E00A-0052-4A83-BE0C-92118E0A393D}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{2D57E00A-0052-4A83-BE0C-92118E0A393D}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{2D57E00A-0052-4A83-BE0C-92118E0A393D}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{2D57E00A-0052-4A83-BE0C-92118E0A393D}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {5E7E598B-396F-4A6C-8C6B-6CB5FD4FBDAC}
+	EndGlobalSection
+EndGlobal