好吧，今天学会了openCV捕获视频

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
// 要引用的类别
using Emgu.CV;
using Emgu.CV.Structure;
using Emgu.Util;
using System.Threading;
namespace MyOpenCV
{
public partial class Form2 : Form
{
public Form2()
{
InitializeComponent();
}
private Capture _capture;
private bool _captureInProgress;
private void ProcessFrame(object sender, EventArgs arg)
{
Image<Bgr, Byte> frame = _capture.QueryFrame();
captureImageBox.Image = frame;
// 请再加上以下四行程式码
Image<Gray, Byte> grayFrame = frame.Convert<Gray, Byte>();
Image<Gray, Byte> cannyFrame = grayFrame.Canny(new Gray(100), new Gray(60));
grayscaleImageBox.Image = grayFrame;
cannyImageBox.Image = cannyFrame;
pictureBox1.BackgroundImage = cannyFrame.Bitmap;
}
private void captureButton_Click(object sender, EventArgs e)
{
#region if capture is not created, create it now
if (_capture == null)
{
try
{
_capture = new Capture();
}
catch (NullReferenceException excpt)
{
MessageBox.Show(excpt.Message);
}
}
#endregion
if (_capture != null)
{
if (_captureInProgress)
{ //stop the capture
Application.Idle -= new EventHandler(ProcessFrame);
captureButton.Text = "Start Capture";
}
else
{
//start the capture
captureButton.Text = "Stop";
Application.Idle += new EventHandler(ProcessFrame);
}
_captureInProgress = !_captureInProgress;
}
}
}
}
　　　　------小学生放假了，大家快跑~~