运行效果如截图：左边和保存的图片做对比，打印相似度，部分打印内容为python中的打印输出，可以用来做结果判断。右边打开摄像头后，可以单张图片进行人脸识别，或者一直截图镜头中的图片进行比对。期中python是使用开源的face_recognition进行人脸识别的。
想了解更多我发过的C#的博客，参考：C#基础知识体系框架图，及起对应我发过的博客_花开莫与流年错_的博客-CSDN博客
下面我先介绍python部分，后附上C#完整代码
官网参考连接：Windows Installation Tutorial · Issue #175 · ageitgey/face_recognition · GitHub
对应github网址：face_recognition/README_Simplified_Chinese.md at master · ageitgey/face_recognition · GitHub
需要先下载CMake，在官网下载即可：Download | CMake
下载python3安装，安装结束时勾选所有用户命令使用：Download Python |
pip下载地址：pip · PyPI
pip安装：下载解压后，到该目录输入
python setup.py install
pip升级：
pip3 install --upgrade pippip install pip或者用这个试试
安装人脸识别及依赖
pip install dlibpip install face_recognitionpip install opencv-contrib-python
执行测试用例（期中第一个图片为保存的图片，第二个图片为我的摄像头实时保存的图片）
import face_recognitionimport sys# face_recognition --cpus 4 ./pictures_of_people_i_know/ ./unknown_pictures/known_image = face_recognition.load_image_file("图片/11.jpg")unknown_image = face_recognition.load_image_file("xx.jpg")biden_encoding = face_recognition.face_encodings(known_image)[0]image_encoding = face_recognition.face_encodings(unknown_image)if len(image_encoding) > 0:unknown_encoding = image_encoding[0]else:print("no")sys.exit(0)results = pare_faces([biden_encoding], unknown_encoding)face_distances = face_recognition.face_distance([biden_encoding], unknown_encoding)# print(results)if results[0] == True and face_distances < 0.4:print("yes")#sys.exit(1) # 返回1else:print("no")#sys.exit(0)print("人脸相似度")print(face_distances)#sleep(1)#print(text)#return results[0]
运行及错误处理
1、python退出运行并返回退出值
import syssys.exit(0)
2、C#调用python实现人脸识别，执行接收后获取python打印值
using (System.Diagnostics.Process p = new System.Diagnostics.Process()){p.StartInfo.FileName = @"python3"; //python会运行错误，提示没有face_recognition，需要制定python3的安装路径p.StartInfo.Arguments = cmd;//python命令的参数p.StartInfo.UseShellExecute = false;p.StartInfo.RedirectStandardOutput = true;p.StartInfo.RedirectStandardInput = true;p.StartInfo.RedirectStandardError = true;p.StartInfo.CreateNoWindow = true;p.Start();//启动进程Console.WriteLine("Start");// p.StandardInput.WriteLine(@"exit()");StreamReader reader = p.StandardOutput;if (reader == null)Console.WriteLine("reader is null");else{string output = reader.ReadToEnd(); // ReadToEnd/ReadLineConsole.WriteLine("face output : " + output);string error = p.StandardError.ReadToEnd();if (error != null && error != "")Console.WriteLine("face err : " + error);}p.WaitForExit(); // 等待控制台程序执行完成Console.WriteLine("执行完毕！");}
偶尔运行报错：IndexError: list index out of range\r\n"
# 不一定有人脸，所以需要先判断是否有人脸，有才对比相似度image_encoding = face_recognition.face_encodings(unknown_image)if len(image_encoding) > 0:unknown_encoding = image_encoding[0]else:print("no")sys.exit(0)
C#完整代码
1、MainForm窗体显示部分
namespace Study_CSharp.摄像头{partial class Video{/// <summary>/// Required designer variable./// </summary>private ponentModel.IContainer components = null;/// <summary>/// Clean up any resources being used./// </summary>/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>protected override void Dispose(bool disposing){if (disposing && (components != null)){components.Dispose();}base.Dispose(disposing);}#region Windows Form Designer generated code/// <summary>/// Required method for Designer support - do not modify/// the contents of this method with the code editor./// </summary>private void InitializeComponent(){this.videoSourcePlayer1 = new AForge.Controls.VideoSourcePlayer();this.button1 = new System.Windows.Forms.Button();this.button2 = new System.Windows.Forms.Button();this.button3 = new System.Windows.Forms.Button();boBox1 = new System.boBox();this.button4 = new System.Windows.Forms.Button();this.button5 = new System.Windows.Forms.Button();this.SuspendLayout();// // videoSourcePlayer1// this.videoSourcePlayer1.Location = new System.Drawing.Point(41, 90);this.videoSourcePlayer1.Name = "videoSourcePlayer1";this.videoSourcePlayer1.Size = new System.Drawing.Size(932, 571);this.videoSourcePlayer1.TabIndex = 7;this.videoSourcePlayer1.Text = "videoSourcePlayer1";this.videoSourcePlayer1.VideoSource = null;// // button1// this.button1.Font = new System.Drawing.Font("微软雅黑", 12F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134)));this.button1.Location = new System.Drawing.Point(704, 22);this.button1.Name = "button1";this.button1.Size = new System.Drawing.Size(144, 47);this.button1.TabIndex = 8;this.button1.Text = "关闭摄像头";this.button1.UseVisualStyleBackColor = true;this.button1.Click += new System.EventHandler(this.button1_Click);// // button2// this.button2.Font = new System.Drawing.Font("微软雅黑", 12F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134)));this.button2.Location = new System.Drawing.Point(364, 22);this.button2.Name = "button2";this.button2.Size = new System.Drawing.Size(144, 47);this.button2.TabIndex = 9;this.button2.Text = "拍照";this.button2.UseVisualStyleBackColor = true;this.button2.Click += new System.EventHandler(this.button2_Click);// // button3// this.button3.Font = new System.Drawing.Font("微软雅黑", 12F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134)));this.button3.Location = new System.Drawing.Point(534, 22);this.button3.Name = "button3";this.button3.Size = new System.Drawing.Size(144, 47);this.button3.TabIndex = 10;this.button3.Text = "保存图片";this.button3.UseVisualStyleBackColor = true;this.button3.Click += new System.EventHandler(this.button3_Click);// // comboBox1// boBox1.DropDownHeight = 100;boBox1.FormattingEnabled = true;boBox1.ItemHeight = 15;boBox1.Location = new System.Drawing.Point(874, 37);boBox1.Name = "comboBox1";boBox1.Size = new System.Drawing.Size(121, 23);boBox1.TabIndex = 11;boBox1.SelectedIndexChanged += new System.EventHandler(boBox1_SelectedIndexChanged);// // button4// this.button4.Font = new System.Drawing.Font("微软雅黑", 12F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134)));this.button4.Location = new System.Drawing.Point(24, 22);this.button4.Name = "button4";this.button4.Size = new System.Drawing.Size(144, 47);this.button4.TabIndex = 12;this.button4.Text = "人脸识别";this.button4.UseVisualStyleBackColor = true;this.button4.Click += new System.EventHandler(this.button4_Click);// // button5// this.button5.Font = new System.Drawing.Font("微软雅黑", 12F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134)));this.button5.Location = new System.Drawing.Point(194, 22);this.button5.Name = "button5";this.button5.Size = new System.Drawing.Size(144, 47);this.button5.TabIndex = 13;this.button5.Text = "实时扫描";this.button5.UseVisualStyleBackColor = true;this.button5.Click += new System.EventHandler(this.button5_Click);// // Video// this.AutoScaleDimensions = new System.Drawing.SizeF(8F, 15F);this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;this.ClientSize = new System.Drawing.Size(1012, 673);this.Controls.Add(this.button5);this.Controls.Add(this.button4);this.Controls.Add(boBox1);this.Controls.Add(this.button3);this.Controls.Add(this.button2);this.Controls.Add(this.button1);this.Controls.Add(this.videoSourcePlayer1);this.Name = "Video";this.Text = "video";this.ResumeLayout(false);}#endregionprivate AForge.Controls.VideoSourcePlayer videoSourcePlayer1;private System.Windows.Forms.Button button1;private System.Windows.Forms.Button button2;private System.Windows.Forms.Button button3;private System.boBox comboBox1;private System.Windows.Forms.Button button4;private System.Windows.Forms.Button button5;}}
2、窗体中代码处理部分
using System;using System.Collections.Generic;using ponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Threading.Tasks;using System.Windows.Forms;using System.IO;using AForge;using AForge.Controls;using AForge.Video;using AForge.Video.DirectShow;namespace Study_CSharp.摄像头{public partial class Video : Form{FilterInfoCollection videoDevices;//摄像头设备集合VideoCaptureDevice videoSource;//捕获设备源Bitmap img;//处理图片public Video(){InitializeComponent();button3.Enabled = false;//先检测电脑所有的摄像头videoDevices = new FilterInfoCollection(FilterCategory.VideoInputDevice);OpenVideo(1);comboBox1.BeginUpdate();for (int i = 1; i <= videoDevices.Count; i++){comboBox1.Items.Add("摄像头" + i);}comboBox1.EndUpdate();if (videoDevices.Count <= 0){MessageBox.Show("没有摄像头");}else{comboBox1.Text = "摄像头1";}}private void button1_Click(object sender, EventArgs e){if (button1.Text == "打开摄像头"){OpenVideo(1);button1.Text = "关闭摄像头";}else{ShutCamera();button1.Text = "打开摄像头";}}// 打开摄像头public void OpenVideo(int n){if (videoDevices.Count >= n){videoSource = new VideoCaptureDevice(videoDevices[n - 1].MonikerString);videoSourcePlayer1.VideoSource = videoSource;videoSourcePlayer1.Start();}}// 关闭并释放摄像头public void ShutCamera(){if (videoSourcePlayer1.VideoSource != null){videoSourcePlayer1.SignalToStop();videoSourcePlayer1.WaitForStop();videoSourcePlayer1.VideoSource = null;}}private void button2_Click(object sender, EventArgs e){img = videoSourcePlayer1.GetCurrentVideoFrame();//拍摄button3.Enabled = true; // 开启“保存”功能}// "保存"按钮click事件private void button3_Click(object sender, EventArgs e){SaveImage(true);}public void SaveImage(bool changeName = false){if (img == null)return;try{//以当前时间为文件名，保存为jpg格式//图片路径在程序bin目录下的Debug下TimeSpan tss = DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0, 0);long a = Convert.ToInt64(tss.TotalMilliseconds) / 1000; //以秒为单位if (changeName)img.Save(string.Format("{0}.jpg", a.ToString()));elseimg.Save("xx.jpg");button3.Enabled = false;}catch (Exception ex){MessageBox.Show(ex.Message);}}private void comboBox1_SelectedIndexChanged(object sender, EventArgs e){string str = comboBox1.Text;int camr = Convert.ToInt32(str[3]) - '0'; // Encoding.ASCII.GetBytes(str);if (button1.Text != "打开摄像头" && camr <= videoDevices.Count){ShutCamera();OpenVideo(camr);}}private void button4_Click(object sender, EventArgs e){RunPythonFaceRecgn("test.py");}// 调用系统命令void RunPythonFaceRecgn(string cmd){try{using (System.Diagnostics.Process p = new System.Diagnostics.Process()){p.StartInfo.FileName = @"python3"; //python会运行错误，提示没有face_recognition，需要制定python3的安装路径p.StartInfo.Arguments = cmd;//python命令的参数p.StartInfo.UseShellExecute = false;p.StartInfo.RedirectStandardOutput = true;p.StartInfo.RedirectStandardInput = true;p.StartInfo.RedirectStandardError = true;p.StartInfo.CreateNoWindow = true;p.Start();//启动进程Console.WriteLine("Start");// p.StandardInput.WriteLine(@"exit()");StreamReader reader = p.StandardOutput;if (reader == null)Console.WriteLine("reader is null");else{string output = reader.ReadToEnd(); // ReadToEnd/ReadLineConsole.WriteLine("face output : " + output);string error = p.StandardError.ReadToEnd();if (error != null && error != "")Console.WriteLine("face err : " + error);}p.WaitForExit(); // 等待控制台程序执行完成Console.WriteLine("执行完毕！");}}catch (Exception e){Console.WriteLine(e.Message);}}bool RunFaceRecgn = false;private void button5_Click(object sender, EventArgs e){if (RunFaceRecgn)RunFaceRecgn = false;elseRunFaceRecgn = true;Task.Run(() => {while (RunFaceRecgn){img = videoSourcePlayer1.GetCurrentVideoFrame();//拍摄SaveImage();RunPythonFaceRecgn("test.py");System.Threading.Thread.Sleep(500);}});}}}
