c# - 使用 Emgu CV 运行相机

Question

我想做人脸识别系统。现在，我正在尝试运行相机，但是我很难运行访问相机。这是我的代码:

public partial class Camera : Form
{
    private Capture capture;
    private HaarCascade haarCascade;
    Timer timer;

    public Camera()
    {
        InitializeComponent();
    }

    private void pictureBox1_Click(object sender, EventArgs e)
    {
        capture = new Capture();
        haarCascade = new HaarCascade(@"haarcascade_frontalface_alt_tree.xml");
        timer = new Timer();
        timer.Tick += new EventHandler(timer1_Tick);
        timer.Interval = new TimeSpan(0, 0, 0, 0, 1);
        timer.Start();
    }        
}

timer.Interval = new TimeSpan(0, 0, 0, 0, 1); 有错误。

这里是错误:

Severity Code Description Project File Line Suppression State Error CS0029 Cannot implicitly convert type 'System.TimeSpan' to 'int' Attendance_Marking_System c:\users\redpranger\documents\visual studio 2017\Projects\Attendance_Marking_System\Attendance_Marking_System\Camera.cs 34 Active

Answer 1

Timer.Interval Property是 Double 类型的属性，而不是 Timespan。

这是属性的定义:

Gets or sets the interval, expressed in milliseconds, at which to raise the Elapsed event.

要将间隔设置为 1 秒(1000 毫秒)，请这样设置:

timer.Interval = 1000;

或者在您的示例中，1 毫秒:

timer.Interval = 1;