C# Emgucv 打开摄像头 与 二维码读取
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;
using Emgu.CV;
using Emgu.CV.Structure;
using System.Text.RegularExpressions;
using ThoughtWorks.QRCode.Codec;
using ThoughtWorks.QRCode.Codec.Data;
using Emgu.CV.CvEnum;
namespace Open_Camera
{
public partial class Form1 : Form
{
int top = 0;
private Emgu.CV.Capture capture = null;
private bool captureinprocess;//判断摄像头的状态
string path;
public Form1()
{
InitializeComponent();
}
private void Open_Camera_Click(object sender, EventArgs e)
{
if (capture != null)//摄像头不为空
{
if (captureinprocess)
{
Application.Idle -= new EventHandler(processfram);
Open_Camera.Text = "Stop!";
Message.Text = "相机已暂停";
}
else
{
Application.Idle += new EventHandler(processfram);
Open_Camera.Text = "Start!";
Message.Text = "相机已工作";
}
captureinprocess = !captureinprocess;
timer.Start();
}
else//摄像头为空则通过Capture()方法调用
{
try
{
capture = new Emgu.CV.Capture();
}
catch (NullReferenceException excpt)
{
MessageBox.Show(excpt.Message);
}
}
}
private void processfram(object sender, EventArgs e)
{
Mat frame = new Mat();
frame = capture.QueryFrame();
Emgu.CV.Image
//Image img = capture.QueryFrame();
imageShow.Image = frame;
}
private void QR_Code_Decode_Click(object sender, EventArgs e)
{
string tt = "";
try
{
Invoke((EventHandler)delegate
{
Message.Text = "识别中···";
});
//pictureBox1.Size = new Size(new Bitmap(filepath).Size.Width, new Bitmap(filepath).Size.Height);
QRCodeDecoder qrDecoder = new QRCodeDecoder();
string txtMsg = qrDecoder.decode(new QRCodeBitmapImage(imageShow.Image.Bitmap/*imageShow.Image.Bitmap*/), Encoding.UTF8);
tt = txtMsg;
}
catch { tt = "识别失败"; }
Invoke((EventHandler)delegate
{
Message.Text = tt;
});
}
private void timer_Tick(object sender, EventArgs e)
{
Bitmap img2 = (Bitmap)imageShow.Image.Bitmap.Clone();
Pen p = new Pen(Color.Red);
Graphics g = Graphics.FromImage(img2);
Point p1 = new Point(0, top);
Point p2 = new Point(imageShow.Width, top);
g.DrawLine(p, p1, p2);
g.Dispose();
top += 2;
top = top % imageShow.Height;
Image
imageShow.Image = cvimage;
}
private void StartFace_Click(object sender, EventArgs e)
{
String win1 = "Test Window"; //The name of the window
CvInvoke.NamedWindow(win1); //Create the window using the specific name
Mat img = new Mat(200, 400, DepthType.Cv8U, 3); //Create a 3 channel image of 400x200
img.SetTo(new Bgr(255, 0, 0).MCvScalar); // set it to Blue color
//Draw "Hello, world." on the image using the specific font
CvInvoke.PutText(
img,
"Hello, world",
new System.Drawing.Point(10, 80),
FontFace.HersheyComplex,
1.0,
new Bgr(0, 255, 0).MCvScalar);
CvInvoke.Imshow(win1, img); //Show the image
CvInvoke.WaitKey(0); //Wait for the key pressing event
CvInvoke.DestroyWindow(win1); //Destroy the window if key is pressed
}
private void LoadPic_Click(object sender, EventArgs e)
{
OpenFileDialog dlg = new OpenFileDialog();
dlg.Title = "请选择图片";
dlg.Filter = "图片文件(*.jpg)|*.jpg";
dlg.Multiselect = false;
if (dlg.ShowDialog() == DialogResult.OK)
{
path = dlg.FileName;
Bitmap img = new Bitmap(path);
Emgu.CV.Image
imageShow.Image = currentFrame;
}
}
}
}