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C# Winform調(diào)用百度接口實(shí)現(xiàn)人臉識(shí)別教程(附源碼)

更新時(shí)間：2020年05月11日 09:26:35 作者：Even-LittleMonkey

這篇文章主要介紹了C# Winform調(diào)用百度接口實(shí)現(xiàn)人臉識(shí)別教程，文中通過(guò)示例代碼介紹的非常詳細(xì)，對(duì)大家的學(xué)習(xí)或者工作具有一定的參考學(xué)習(xí)價(jià)值，需要的朋友們下面隨著小編來(lái)一起學(xué)習(xí)學(xué)習(xí)吧

百度是個(gè)好東西，這篇調(diào)用了百度的接口（當(dāng)然大牛也可以自己寫），人臉檢測(cè)技術(shù)，所以使用的前提是有網(wǎng)的情況下。當(dāng)然大家也可以去參考百度的文檔。

話不多說(shuō)，我們開始：

第一步，在百度創(chuàng)建你的人臉識(shí)別應(yīng)用

打開百度AI開放平臺(tái)鏈接: 點(diǎn)擊跳轉(zhuǎn)百度人臉檢測(cè)鏈接，創(chuàng)建新應(yīng)用

創(chuàng)建成功成功之后。進(jìn)行第二步

第二步，使用API Key和Secret Key，獲取 AssetToken

平臺(tái)會(huì)分配給你相關(guān)憑證，拿到API Key和Secret Key，獲取 AssetToken

接下來(lái)我們創(chuàng)建一個(gè)AccessToken類，來(lái)獲取我們的AccessToken

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Http;
using System.Text;
using System.Threading.Tasks;

namespace AegeanHotel_management_system
{
  class AccessToken
  {
    // 調(diào)用getAccessToken()獲取的 access_token建議根據(jù)expires_in 時(shí)間 設(shè)置緩存
    // 返回token示例
    public static string TOKEN = "24.ddb44b9a5e904f9201ffc1999daa7670.2592000.1578837249.282335-18002137";

    // 百度云中開通對(duì)應(yīng)服務(wù)應(yīng)用的 API Key 建議開通應(yīng)用的時(shí)候多選服務(wù)
    private static string clientId = "這里是你的API Key";
    // 百度云中開通對(duì)應(yīng)服務(wù)應(yīng)用的 Secret Key
    private static string clientSecret = "這里是你的Secret Key";

    public static string getAccessToken()
    {
      string authHost = "https://aip.baidubce.com/oauth/2.0/token";
      HttpClient client = new HttpClient();
      List<KeyValuePair<String, String>> paraList = new List<KeyValuePair<string, string>>();
      paraList.Add(new KeyValuePair<string, string>("grant_type", "client_credentials"));
      paraList.Add(new KeyValuePair<string, string>("client_id", clientId));
      paraList.Add(new KeyValuePair<string, string>("client_secret", clientSecret));

      HttpResponseMessage response = client.PostAsync(authHost, new FormUrlEncodedContent(paraList)).Result;
      string result = response.Content.ReadAsStringAsync().Result;
      return result;
    }
  }
}

第三步，封裝圖片信息類Face，保存圖像信息

封裝圖片信息類Face，保存拍到的圖片信息，保存到百度云端中，用于以后掃描秒人臉做對(duì)比。

using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace AegeanHotel_management_system
{
  [Serializable]
  class Face
  {
    [JsonProperty(PropertyName = "image")]
    public string Image { get; set; }
    [JsonProperty(PropertyName = "image_type")]
    public string ImageType { get; set; }
    [JsonProperty(PropertyName = "group_id_list")]
    public string GroupIdList { get; set; }
    [JsonProperty(PropertyName = "quality_control")]
    public string QualityControl { get; set; } = "NONE";
    [JsonProperty(PropertyName = "liveness_control")]
    public string LivenessControl { get; set; } = "NONE";
    [JsonProperty(PropertyName = "user_id")]
    public string UserId { get; set; }
    [JsonProperty(PropertyName = "max_user_num")]
    public int MaxUserNum { get; set; } = 1;
  }
}

第四步，定義人臉注冊(cè)和搜索類FaceOperate

定義人臉注冊(cè)和搜索類FaceOperate，里面定義兩個(gè)方法分別為，注冊(cè)人臉?lè)椒ê退阉魅四樂(lè)椒ā?/p>

using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;

namespace AegeanHotel_management_system
{
  class FaceOperate : IDisposable
  {
    public string token { get; set; }
    /// <summary>
    /// 注冊(cè)人臉
    /// </summary>
    /// <param name="face"></param>
    /// <returns></returns>
    public FaceMsg Add(FaceInfo face)
    {
      string host = "https://aip.baidubce.com/rest/2.0/face/v3/faceset/user/add?access_token=" + token;
      Encoding encoding = Encoding.Default;
      HttpWebRequest request = (HttpWebRequest)WebRequest.Create(host);
      request.Method = "post";
      request.KeepAlive = true;
      String str = JsonConvert.SerializeObject(face);
      byte[] buffer = encoding.GetBytes(str);
      request.ContentLength = buffer.Length;
      request.GetRequestStream().Write(buffer, 0, buffer.Length);
      HttpWebResponse response = (HttpWebResponse)request.GetResponse();
      StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.Default);
      string result = reader.ReadToEnd();
      FaceMsg msg = JsonConvert.DeserializeObject<FaceMsg>(result);
      return msg;
    }
    /// <summary>
    /// 搜索人臉
    /// </summary>
    /// <param name="face"></param>
    /// <returns></returns>
    public MatchMsg FaceSearch(Face face)
    {
      string host = "https://aip.baidubce.com/rest/2.0/face/v3/search?access_token=" + token;
      Encoding encoding = Encoding.Default;
      HttpWebRequest request = (HttpWebRequest)WebRequest.Create(host);
      request.Method = "post";
      request.KeepAlive = true;
      String str = JsonConvert.SerializeObject(face); ;
      byte[] buffer = encoding.GetBytes(str);
      request.ContentLength = buffer.Length;
      request.GetRequestStream().Write(buffer, 0, buffer.Length);
      HttpWebResponse response = (HttpWebResponse)request.GetResponse();
      StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.Default);
      string result = reader.ReadToEnd();
      MatchMsg msg = JsonConvert.DeserializeObject<MatchMsg>(result);
      return msg;
    }
    public void Dispose()
    {

    }
  }
}

在把類定義完成之后，我們就可以繪制我們的攝像頭了videoSourcePlayer

第五步，繪制videoSourcePlayer控件，對(duì)人臉進(jìn)行拍攝

現(xiàn)在我們是沒(méi)有這個(gè)控件的，所以我們要先導(dǎo)包，點(diǎn)擊我們的工具選項(xiàng)卡，選擇NuGet包管理器，管理解決方案的NuGet程序包，安裝一下的包：

然后我們就能看到videoSourcePlayer控件，把它繪制在窗體上就好了。

第五步，調(diào)用攝像頭拍攝注冊(cè)人臉

然后我們就可以寫控制攝像頭的語(yǔ)句以及拍攝之后注冊(cè)處理的方法了：

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

namespace AegeanHotel_management_system
{
  public partial class FrmFacePeople : Form
  {
    string tocken = "";
    public FrmFacePeople()
    {
      InitializeComponent();
      Tocken tk = JsonConvert.DeserializeObject<Tocken>(AccessToken.getAccessToken());
      this.tocken = tk.AccessToken;
    }

    private FilterInfoCollection videoDevices;
    private VideoCaptureDevice videoDevice;
    private void FrmFacePeople_Load(object sender, EventArgs e)
    {
      //獲取攝像頭
      videoDevices = new FilterInfoCollection(FilterCategory.VideoInputDevice);
      //實(shí)例化攝像頭
      videoDevice = new VideoCaptureDevice(videoDevices[0].MonikerString);
      //將攝像頭視頻播放在控件中
      videoSourcePlayer1.VideoSource = videoDevice;
      //開啟攝像頭
      videoSourcePlayer1.Start();
    }

    private void FrmFacePeople_FormClosing(object sender, FormClosingEventArgs e)
    {
      videoSourcePlayer1.Stop();
    }

    private void button1_Click(object sender, EventArgs e)
    {
      //拍照
      Bitmap img = videoSourcePlayer1.GetCurrentVideoFrame();
      //圖片轉(zhuǎn)Base64
      string imagStr = ImagHelper.ImgToBase64String(img);
      //實(shí)例化FaceInfo對(duì)象
      FaceInfo faceInfo = new FaceInfo();
      faceInfo.Image = imagStr;
      faceInfo.ImageType = "BASE64";
      faceInfo.GroupId = "admin";
      faceInfo.UserId = Guid.NewGuid().ToString().Replace('-', '_');//生成一個(gè)隨機(jī)的UserId 可以固定為用戶的主鍵
      faceInfo.UserInfo = "";
      using (FaceOperate faceOperate = new FaceOperate())
      {
        faceOperate.token = tocken;
        //調(diào)用注冊(cè)方法注冊(cè)人臉
        var msg = faceOperate.Add(faceInfo);
        if (msg.ErroCode == 0)
        {
          MessageBox.Show("添加成功");
          //關(guān)閉攝像頭
          videoSourcePlayer1.Stop();
        }
      }
    }
  }
}

我們?cè)谔砑尤四樦罂梢缘桨俣戎荒茉频娜四槑?kù)中查看一下添加是否成功。

如果添加成功，那么恭喜，我們就可以進(jìn)行人臉識(shí)別了。

第六步，拍攝之后對(duì)比查詢?nèi)四樧R(shí)別

然后我們就可以寫控制攝像頭的語(yǔ)句以及拍攝之后搜索處理的方法了：

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

namespace AegeanHotel_management_system
{
  public partial class FrmFaceDemo : Form
  {
    string tocken = "";
    FrmLogin login;
    public FrmFaceDemo(FrmLogin login)
    {
      
      this.login = login;
      InitializeComponent();
      //獲取Token并反序列化
      Tocken tk = JsonConvert.DeserializeObject<Tocken>(AccessToken.getAccessToken());
      this.tocken = tk.AccessToken;
    }
    
    private FilterInfoCollection videoDevices;
    private VideoCaptureDevice videoDevice;

    private void FrmFaceDemo_Load(object sender, EventArgs e)
    {
      videoDevices = new FilterInfoCollection(FilterCategory.VideoInputDevice);
      videoDevice = new VideoCaptureDevice(videoDevices[0].MonikerString);
      videoSourcePlayer1.VideoSource = videoDevice;
      //開啟攝像頭
      videoSourcePlayer1.Start();
    }
    private void NewMethod()
    {
      //獲取圖片 拍照
      Bitmap img = videoSourcePlayer1.GetCurrentVideoFrame();
      //關(guān)閉相機(jī)
      videoSourcePlayer1.Stop();
      //圖片轉(zhuǎn)Base64
      string imagStr = ImagHelper.ImgToBase64String(img);
      Face faceInfo = new Face();
      faceInfo.Image = imagStr;
      faceInfo.ImageType = "BASE64";
      faceInfo.GroupIdList = "admin";
      this.Hide();
      using (FaceOperate faceOperate = new FaceOperate())
      {
        try
        {
          faceOperate.token = tocken;
          //調(diào)用查找方法
          var msg = faceOperate.FaceSearch(faceInfo);
            
          foreach (var item in msg.Result.UserList)
          {
            //置信度大于90 認(rèn)為是本人
            if (item.Score > 90)
            {
              DialogResult dialog = MessageBox.Show("登陸成功", "系統(tǒng)提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
              //this.label1.Text = item.UserId;
              if (dialog == DialogResult.OK)
              {
                FrmShouYe shouye = new FrmShouYe();
                shouye.Show();
                login.Hide();
                this.Close();
                
              }
              return;
            }
            else
            {
              DialogResult dialog = MessageBox.Show("人員不存在", "系統(tǒng)提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
              if (dialog == DialogResult.OK)
              {
                this.Close();
              }
            }
          }
        }
        catch (Exception e)
        {
          DialogResult dialog = MessageBox.Show("人員不存在,錯(cuò)誤提示"+e, "系統(tǒng)提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
          if (dialog == DialogResult.OK)
          {
            this.Close();
          }
        }
        
      }
    }

    private void videoSourcePlayer1_Click(object sender, EventArgs e)
    {
      NewMethod();
    }
  }
}

寫到這我們就結(jié)束了，人臉識(shí)別的注冊(cè)和搜索功能就已經(jīng)都實(shí)現(xiàn)完畢了，接下來(lái)我們還可以在百度智能云的監(jiān)控報(bào)報(bào)表中查看調(diào)用次數(shù)

查看監(jiān)控報(bào)表

到此這篇關(guān)于C# Winform調(diào)用百度接口實(shí)現(xiàn)人臉識(shí)別教程(附源碼)的文章就介紹到這了,更多相關(guān)C# 百度接口人臉識(shí)別內(nèi)容請(qǐng)搜索腳本之家以前的文章或繼續(xù)瀏覽下面的相關(guān)文章希望大家以后多多支持腳本之家！

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