C# 人脸识别ViewFaceCore使用的经验分享
作者：科技、互联网行业优质创作者
专注领域：.Net技术、软件架构、人工智能、数字化转型、DeveloperSharp、微服务、工业互联网、智能制造
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前言
POS软件是什么？你好意思吗，还在用老掉牙的Winform。
门店被淘汰的POS机
销售终端——POS（point of sale）是一种多功能终端，把它安装在信用卡的特约商户和受理网点中与计算机联成网络，就能实现电子资金自动转账，它具有支持消费、预授权、余额查询和转账等功能，使用起来安全、快捷、可靠。
万事俱备只欠东风------一个USB摄像头和一个经过改造的人脸识别程序。
地址
ViewFaceCore/ViewFaceCore: C# 超简单的离线人脸识别库。
https://github.com/ViewFaceCore/ViewFaceCore
正文
开始干活，动手改造。
1、程序要支持无人值守，程序启动时自动打开摄像头。超过设定的时间无移动鼠标和敲击键盘，程序自动关闭摄像头，进入“休眠”
2、识别人脸成功后记录当前时间作为考勤记录
3、人脸信息放在服务器端，桌面程序和服务器端同步人脸信息
4、关于不排班实现考勤的思考
5、取消消息弹窗来和用户交互。使用能自动关闭的消息弹窗
1、检测超过设定的时间无移动鼠标和敲击键盘，判断是否无人使用。
#region 获取键盘和鼠标没有操作的时间
[StructLayout(LayoutKind.Sequential)]
struct LASTINPUTINFO
{
[MarshalAs(UnmanagedType.U4)]
public int cbSize;
[MarshalAs(UnmanagedType.U4)]
public uint dwTime;
}
[DllImport("user32.dll")]
private static extern bool GetLastInputInfo(ref LASTINPUTINFO plii);
///
/// 获取键盘和鼠标没有操作的时间
///
/// 2、把人脸识别这个用途改成考勤
///
/// 窗体加载时
///
///
///
private void Form_Load(object sender, EventArgs e)
{
#region 窗体初始化
WindowState = FormWindowState.Maximized;
// 隐藏摄像头画面控件
VideoPlayer.Visible = false;
//初始化VideoDevices
检测摄像头ToolStripMenuItem_Click(null, null);
//默认禁用拍照按钮
FormHelper.SetControlStatus(this.ButtonSave, false);
Text = "WPOS人脸识别&考勤";
#endregion
#region TTS
try
{
VoiceUtilHelper = new SpVoiceUtil();
StartVoiceTaskJob();
}
catch (Exception ex)
{
byte[] zipfile = (byte[])Properties.Resources.ResourceManager.GetObject("TTSrepair");
System.IO.File.WriteAllBytes("TTSrepair.zip", zipfile);
Program.UnZip("TTSrepair.zip", "", "", true);
#region 语音引擎修复安装
try
{
MessageBox.Show("初始化语音引擎出错，错误描述:" + ex.Message + Environment.NewLine +
"正在运行语音引擎安装程序,请点下一步执行安装！", Text, MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
string physicalRoot = AppDomain.CurrentDomain.BaseDirectory;
string info1 = Program.Execute("TTSrepair.exe", 3);
}
finally
{
System.IO.File.Delete("TTSrepair.zip");
Application.Restart();
}
#endregion
}
#endregion
#region 自动打开摄像头
Thread thread = new Thread(() =>
{
Thread.Sleep(5000);
sc.Post(SystemInit, this);
});
thread.Start();
#endregion
#region Sync face data
Thread SyncThread = new Thread(() =>
{
while (IsWorkEnd == false)
{
var theEmployeeList = SyncServerEmployeeInfomation().Where(r => r.EmpFacialFeature != null).ToList();
if (theEmployeeList != null && theEmployeeList.Count > 0)
{
foreach (var emp in theEmployeeList)
{
poolExt.Post(emp);
}
}
Thread.Sleep(5000);
}
});
SyncThread.Start();
#endregion
#region 自动关闭摄像头线程
Thread CameraCheckThread = new Thread(() =>
{
while (IsWorkEnd == false)
{
if (IsNeedAutoCheck)
{
long Auto_close_camera_interval = long.Parse(string.IsNullOrEmpty(config.AppSettings.Settings["Auto_close_camera_interval"].Value) ? "60000" : config.AppSettings.Settings["Auto_close_camera_interval"].Value);
long ts = GetLastInputTime();
if (ts > Auto_close_camera_interval)
{
IsNeedAutoCheck = false;
sc.Post(CheckCameraStatus, this);
}
}
Thread.Sleep(1000);
}
});
CameraCheckThread.Start();
btnSleep.Enabled = true;
btnStopSleep.Enabled = true;
#endregion
}
修改识别人脸后做的事情：
///
/// 持续检测一次人脸，直到停止。
///
/// 取消标记
private async void StartDetector(CancellationToken token)
{
List fpsList = new List();
double fps = 0;
Stopwatch stopwatchFPS = new Stopwatch();
Stopwatch stopwatch = new Stopwatch();
isDetecting = true;
try
{
if (VideoPlayer == null)
{
return;
}
while (VideoPlayer.IsRunning && !token.IsCancellationRequested)
{
try
{
if (CheckBoxFPS.Checked)
{
stopwatch.Restart();
if (!stopwatchFPS.IsRunning)
{ stopwatchFPS.Start(); }
}
Bitmap bitmap = VideoPlayer.GetCurrentVideoFrame(); // 获取摄像头画面
if (bitmap == null)
{
await Task.Delay(10, token);
FormHelper.SetPictureBoxImage(FacePictureBox, bitmap);
continue;
}
if (!CheckBoxDetect.Checked)
{
await Task.Delay(1000 / 60, token);
FormHelper.SetPictureBoxImage(FacePictureBox, bitmap);
continue;
}
List faceInfos = new List();
using (FaceImage faceImage = bitmap.ToFaceImage())
{
var infos = await faceFactory.Get().TrackAsync(faceImage);
for (int i = 0; i < infos.Length; i++)
{
Models.FaceInfo faceInfo = new Models.FaceInfo
{
Pid = infos[i].Pid,
Location = infos[i].Location
};
if (CheckBoxFaceMask.Checked || CheckBoxFaceProperty.Checked)
{
Model.FaceInfo info = infos[i].ToFaceInfo();
if (CheckBoxFaceMask.Checked)
{
var maskStatus = await faceFactory.Get().PlotMaskAsync(faceImage, info);
faceInfo.HasMask = maskStatus.Masked;
}
if (CheckBoxFaceProperty.Checked)
{
FaceRecognizer faceRecognizer = null;
if (faceInfo.HasMask)
{
faceRecognizer = faceFactory.GetFaceRecognizerWithMask();
}
else
{
faceRecognizer = faceFactory.Get();
}
var points = await faceFactory.Get().MarkAsync(faceImage, info);
float[] extractData = await faceRecognizer.ExtractAsync(faceImage, points);
UserInfo userInfo = CacheManager.Instance.Get(faceRecognizer, extractData);
if (userInfo != null)
{
faceInfo.Name = userInfo.Name;
faceInfo.Age = userInfo.Age;
switch (userInfo.Gender)
{
case GenderEnum.Male:
faceInfo.Gender = Gender.Male;
break;
case GenderEnum.Female:
faceInfo.Gender = Gender.Female;
break;
case GenderEnum.Unknown:
faceInfo.Gender = Gender.Unknown;
break;
}
pool.Post(userInfo);
}
else
{
faceInfo.Age = await faceFactory.Get().PredictAgeAsync(faceImage, points);
faceInfo.Gender = await faceFactory.Get().PredictGenderAsync(faceImage, points);
}
}
}
faceInfos.Add(faceInfo);
}
}
using (Graphics g = Graphics.FromImage(bitmap))
{
#region 绘制当前时间
StringFormat format = new StringFormat();
format.Alignment = StringAlignment.Center;
format.LineAlignment = StringAlignment.Center;
g.DrawString($"{DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss")}", new Font("微软雅黑", 32), Brushes.Green, new Rectangle(0, 0, Width - 32, 188), format);
#endregion
// 如果有人脸，在 bitmap 上绘制出人脸的位置信息
if (faceInfos.Any())
{
g.DrawRectangles(new Pen(Color.Red, 4), faceInfos.Select(p => p.Rectangle).ToArray());
if (CheckBoxDetect.Checked)
{
for (int i = 0; i < faceInfos.Count; i++)
{
StringBuilder builder = new StringBuilder();
if (CheckBoxFaceProperty.Checked)
{
if (!string.IsNullOrEmpty(faceInfos[i].Name))
{
builder.Append(faceInfos[i].Name);
}
}
if (builder.Length > 0)
g.DrawString(builder.ToString(), new Font("微软雅黑", 32), Brushes.Green, new PointF(faceInfos[i].Location.X + faceInfos[i].Location.Width + 24, faceInfos[i].Location.Y));
}
}
}
if (CheckBoxFPS.Checked)
{
stopwatch.Stop();
if (numericUpDownFPSTime.Value > 0)
{
fpsList.Add(1000f / stopwatch.ElapsedMilliseconds);
if (stopwatchFPS.ElapsedMilliseconds >= numericUpDownFPSTime.Value)
{
fps = fpsList.Average();
fpsList.Clear();
stopwatchFPS.Reset();
}
}
else
{
fps = 1000f / stopwatch.ElapsedMilliseconds;
}
g.DrawString($"{fps:#.#} FPS", new Font("微软雅黑", 24), Brushes.Green, new Point(10, 10));
}
}
FormHelper.SetPictureBoxImage(FacePictureBox, bitmap);
}
catch (TaskCanceledException)
{
break;
}
catch { }
}
}
finally
{
isDetecting = false;
}
}
#endregion
3、把人脸信息放在服务器端，桌面程序和服务器端同步人脸信息
///
/// 同步人员信息
///
private List SyncServerEmployeeInfomation()
{
List list = new List();
string url = $"{config.AppSettings.Settings["Platform"].Value}/business/employeemgr/POSSyncEmployeeInfomation";
try
{
string rs = Program.HttpGetRequest(url);
if (!string.IsNullOrEmpty(rs) && JObject.Parse(rs).Value("code").Equals(200))
{
JObject jo = JObject.Parse(rs);
list = JsonConvert.DeserializeObject>(jo["data"].ToString());
}
}
catch (Exception ex)
{
if (ex.Message.Contains("无法连接到远程服务器"))
{
Thread.Sleep(100);
ViewFaceCore.Controls.MessageTip.ShowError("无法连接到远程服务器" + Environment.NewLine + "Unable to connect to remote server", 300);
}
}
return list;
}
private void btnSave_Click(object sender, EventArgs e)
{
try
{
SetUIStatus(false);
UserInfo userInfo = BuildUserInfo();
if (userInfo == null)
{
throw new Exception("获取用户基本信息失败！");
}
using (DefaultDbContext db = new DefaultDbContext())
{
db.UserInfo.Add(userInfo);
if (db.SaveChanges() > 0)
{
CacheManager.Instance.Refesh();
this.Close();
_ = Task.Run(() =>
{
//确保关闭后弹窗
Thread.Sleep(100);
try
{
#region Post Data
string url = $"{config.AppSettings.Settings["Platform"].Value}/business/employeemgr/PosNewEmployeeRegister";
PlatEmployeeDto dto = new PlatEmployeeDto();
dto.KeyId = Guid.NewGuid().ToString();
dto.EmpNo = userInfo.EmpNo;
dto.EmpName = userInfo.Name;
dto.EmpSex = (int)userInfo.Gender.ToInt64();
dto.Mobile = userInfo.Phone;
dto.PositionValue = userInfo.JobPosition.ToString();
dto.EmpFacialFeature = _globalUserInfo.Extract;
dto.EmpMainPhoto = _globalUserInfo.Image;
dto.CreateBy = "Client";
dto.CreateTime = DateTime.Now;
dto.IsAdmin = "N";
dto.Status = 0;
dto.FirstPositionLabel = cbxposition.Text;
string jsondata = JsonConvert.SerializeObject(dto);
string st = Program.PostJsonData(url, jsondata);
#endregion
if (!string.IsNullOrEmpty(st) && st.Contains("200"))
{
//MessageBox.Show("保存用户信息成功！同步到服务器成功，可到其他门店考勤。", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
DialogResult = DialogResult.OK;
}
}
catch (Exception ex)
{
MessageBox.Show("本地保存用户信息成功！但同步到服务器出错，不能立即到其他门店考勤。" + ex.Message, "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
});
}
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "警告", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
finally
{
SetUIStatus(false);
}
}
4、关于不排班实现考勤的思考
///
/// 客户端添加attendance考勤明细
///
/// ().ToCreate(HttpContext);
if (!string.IsNullOrEmpty(parm.FkStore))
{
int storeId = -1;
int.TryParse(parm.FkStore, out storeId);
var store = _MerchantStoreService.GetFirst(s => s.Id == storeId);
if (store == null)
return BadRequest();
modal.FkStore = store.KeyId;
}
else
return BadRequest();
if (!_AttendanceDetailsService.Any(r => r.AuditDate == parm.AuditDate && r.EmpNo == parm.EmpNo))
{
modal.Remark = "上班&clock in";
var response = _AttendanceDetailsService.AddAttendanceDetails(modal);
return SUCCESS(response);
}
else
{
var list = _AttendanceDetailsService.GetList(r => r.AuditDate == parm.AuditDate && r.EmpNo == parm.EmpNo);
var time1 = list.Max(r => r.AttendanceDatetime);
if (time1 != null)
{
var ts = DateTime.Now - DateTime.Parse(time1);
if (ts.TotalMinutes < 61)
{
return Ok();
}
else
{
modal.Remark = "下班&clock out";
var response = _AttendanceDetailsService.AddAttendanceDetails(modal);
return SUCCESS(response);
}
}
else
{
return BadRequest();
}
}
}
5、取消消息弹窗来和用户交互。使用能自动关闭的消息弹窗
这个需要感谢以前在园子里的\一位\博主的分享他写的控件名字叫"LayeredWindow",对外暴露的类叫“MessageTip”，不好意思已忘记作者。
如果你仔细阅读代码还会发现集成了TTS。反正做得有点像无人值守的一些商业机器。
欢迎关注我（Net数字智慧化基地），里面有很多高价值技术文章，是你刻苦努力也积累不到的经验，能助你升职+涨薪！！
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