人脸认证源码faceIdentify详解

using AForge.Video.DirectShow;
using face;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Camtest
{
 public partial class faceIdentify : Form
 {
  public faceIdentify()
  {
   InitializeComponent();
   //启动默认在屏幕中间
   this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
  }
  //Api_Key
  public static string Api_Key = "OVYw5Ok0y9U8n6CfVPYt0wfZ";
  //Secret_Key
  public static string Secret_Key = "aCN3lupCarq3rC9G8Rylqz1d36Towp8G";
  FilterInfoCollection videoDevices;
  VideoCaptureDevice videoSource;
  public int selectedDeviceIndex = 0;
  public int selectedPICIndex = 0;

  //窗体加载
  private void faceIdentify_Load(object sender, EventArgs e)
  {
   //显示为正在检测
   this.label1.Text = this.label2.Text = this.label6.Text = this.label9.Text = "正在识别";

   // 刷新可用相机的列表
   videoDevices = new FilterInfoCollection(FilterCategory.VideoInputDevice);
   comboBoxCameras.Items.Clear();

   for (int i = 0; i < videoDevices.Count; i++)
   {
    comboBoxCameras.Items.Add(videoDevices[i].Name.ToString());
   }


   if (comboBoxCameras.Items.Count > 0)
    comboBoxCameras.SelectedIndex = 0;
   picsize.SelectedIndex = 0;

   //打开摄像头
   openCamera();
  }

  //打开摄像头
  public void openCamera()
  {
   selectedPICIndex = picsize.SelectedIndex;

   selectedDeviceIndex = comboBoxCameras.SelectedIndex;
   //连接摄像头。
   videoSource = new VideoCaptureDevice(videoDevices[selectedDeviceIndex].MonikerString);
   videoSource.VideoResolution = videoSource.VideoCapabilities[selectedDeviceIndex];
   // 枚举所有摄像头支持的像素，设置拍照为1920*1080
   foreach (VideoCapabilities capab in videoSource.VideoCapabilities)
   {
    if (selectedPICIndex == 0)
    {
     if (capab.FrameSize.Width == 1920 && capab.FrameSize.Height == 1080)
     {
      videoSource.VideoResolution = capab;
      break;
     }
     if (capab.FrameSize.Width == 1280 && capab.FrameSize.Height == 720)
     {
      videoSource.VideoResolution = capab;
      break;
     }
    }
    else
    {
     if (capab.FrameSize.Width == 1280 && capab.FrameSize.Height == 720)
     {
      videoSource.VideoResolution = capab;
      break;
     }
    }
   }
   videoSourcePlayer1.VideoSource = videoSource;

   // set NewFrame event handler
   videoSourcePlayer1.Start();
  }

  /// <summary>
  /// 签到的按钮
  /// 先保存图片，然后进行比较，获取的id，查询
  /// </summary>
  /// <param name="sender"></param>
  /// <param name="e"></param>
  private void qiandao_Click(object sender, EventArgs e)
  {
   Users users = FaceIdentifys(SavePicture());
   this.label1.Text = users.age.ToString();
   this.label2.Text = users.name;
   this.label6.Text = users.phone;
   this.label9.Text = users.address;
   if (users.picture != null)
   {
    this.pictureBox1.Image = Image.FromFile(users.picture, false);
   }

  }

  //关闭窗口
  private void faceIdentify_FormClosing(object sender, FormClosingEventArgs e)
  {
   DialogResult r = MessageBox.Show("确定要退出程序?", "操作提示", MessageBoxButtons.OKCancel, MessageBoxIcon.Question);
   if (r != DialogResult.OK)
   {

    e.Cancel = true;
   }
   videoSourcePlayer1.Stop();//停止摄像头
   videoSourcePlayer1.Dispose();
  }

  /// <summary>
  /// 人脸识别
  /// </summary>
  /// <param name="filename"></param>
  public static Users FaceIdentifys(string filename)
  {
   long id = 0;
   string ids = "";
   double scores_num = 0;
   Users user = new Users();
   var client = new Baidu.Aip.Face.Face(Api_Key, Secret_Key);
   var image1 = File.ReadAllBytes(filename);
   var result = client.User.Identify(image1, new[] { "gr_test" }, 1, 1);
   //先判断脸是不是在上面，在继续看有匹配的没，否则提示放上脸
   //得到根节点
   JObject jo_result = (JObject)JsonConvert.DeserializeObject(result.ToString());
   if ((string)jo_result["error_msg"] != null)
   {
    MessageBox.Show("对不起，请把脸放上！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Stop);
   }
   else
   {
    //检测到脸
    //得到result节点
    JArray jo_age = (JArray)JsonConvert.DeserializeObject(jo_result["result"].ToString());
    foreach (var val in jo_age)
    {
     id = long.Parse(((JObject)val)["uid"].ToString()); //获取uid
     string scores = ((JObject)val)["scores"].ToString();//获取scores
     int num1 = scores.IndexOf("n") + 2;
     int num2 = scores.LastIndexOf("]")-8;
     ids = scores.Substring(num1, num2);
     scores_num =double.Parse(ids);
    }
    if (scores_num > 80)
    {
     user = QueryUsersById(id);
     if (user.id != 0)
     {
      MessageBox.Show("签到成功，已检测到您的信息", "操作提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
     }
     else
     {
      MessageBox.Show("对不起，系统根据您的脸未检测到信息", "操作提示", MessageBoxButtons.OK, MessageBoxIcon.Stop);
     }
    }
    else {
     MessageBox.Show("对不起，系统根据您的脸未检测到信息", "操作提示", MessageBoxButtons.OK, MessageBoxIcon.Stop);
    }

   }
   return user;

  }

  /// <summary>
  /// 保存图片
  /// </summary>
  public string SavePicture()
  {
   if (videoSource == null)
   {
    return null;
   }

   Bitmap bitmap = videoSourcePlayer1.GetCurrentVideoFrame();
   //图片名称，年月日时分秒毫秒.jpg
   string fileName = DateTime.Now.ToString("yyyyMMddHHmmssff") + ".jpg";

   //获取项目的根目录
   string path = AppDomain.CurrentDomain.BaseDirectory;
   string picture = path + "\picture\" + fileName;
   //将图片保存在服务器里面
   bitmap.Save(picture, ImageFormat.Jpeg);
   bitmap.Dispose();
   return picture;
  }

  /// <summary>
  /// 根据编号查询用户信息
  /// </summary>
  /// <param name="id"></param>
  /// <returns></returns>
  public static Users QueryUsersById(long id)
  {

   Users user = new Users();
   string sql = "select * from users where id = @id";
   using (SqlDataReader reader = SqlHelper.ExcuteReader(sql, CommandType.Text, new SqlParameter("@id", id)))
   {
    if (reader.Read())
    {
     user.id = long.Parse(reader[0].ToString());
     user.name = reader[1].ToString();
     user.age = Convert.ToInt32(reader[2]);
     user.phone = reader[3].ToString();
     user.password = reader[4].ToString();
     user.address = reader[5].ToString();
     user.picture = reader[6].ToString();
    }
   }
   return user;
  }

  //取消的按钮
  private void close_Click(object sender, EventArgs e)
  {
   //停止摄像头
   videoSourcePlayer1.Stop();
   this.Close();
   welcome we = new welcome();
   we.Show();
  }


 }
}