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C# 二维码生成、识别
原创
lw112190
2023-05-11 10:48:57
博主文章分类：C#
©著作权
文章标签
二维码
System
Image
Text
文章分类
Python
后端开发
©著作权归作者所有：来自51CTO博客作者lw112190的原创作品，请联系作者获取转载授权，否则将追究法律责任
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;
using com.google.zxing.common;
using AForge.Video.DirectShow;
using com.google.zxing;
using AForge.Video;
namespace CameraQRCode
{
public partial class frmMain : Form
{
public frmMain()
{
InitializeComponent();
}
///调用AForge使用摄像头
FilterInfoCollection Use_Webcams = null;
VideoCaptureDevice cam = null;
OpenFileDialog openFileDialog1 = new OpenFileDialog();
///
/// 生成二维码并保存图片
///
///
///
private void btnQRCode_Click(object sender, EventArgs e)
{
string content = txtInputForQR.Text;
ByteMatrix byteMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, 300, 300);
Bitmap bitmap = toBitmap(byteMatrix);
pictureBox1.Image = bitmap;
SaveFileDialog sFD = new SaveFileDialog();
sFD.Filter = "保存图片(*.png) |*.png|所有文件(*.*) |*.*";
sFD.DefaultExt = "*.png|*.png";
sFD.AddExtension = true;
if (sFD.ShowDialog() == DialogResult.OK)
{
if (sFD.FileName != "")
{
writeToFile(byteMatrix, System.Drawing.Imaging.ImageFormat.Png, sFD.FileName);
}
}
}
///
/// 解析
///
///
///
private void btnQRDeCode_Click(object sender, EventArgs e)
{
if (this.openFileDialog1.ShowDialog() != DialogResult.OK)
{
return;
}
Image img = Image.FromFile(this.openFileDialog1.FileName);
Bitmap bmap;
try
{
bmap = new Bitmap(img);
}
catch (System.IO.IOException ioe)
{
MessageBox.Show(ioe.ToString());
return;
}
if (bmap == null)
{
MessageBox.Show("Could not decode image");
return;
}
LuminanceSource source = new RGBLuminanceSource(bmap, bmap.Width, bmap.Height);
com.google.zxing.BinaryBitmap bitmap1 = new com.google.zxing.BinaryBitmap(new HybridBinarizer(source));
Result result;
try
{
result = new MultiFormatReader().decode(bitmap1);
}
catch (ReaderException re)
{
MessageBox.Show(re.ToString());
return;
}
txtOutputQR.Text = result.Text;
//MessageBox.Show(result.Text);
}
///
/// 关闭摄像头
///
///
///
private void btnStop_Click(object sender, EventArgs e)
{
if (cam != null)
{
//关闭摄像头
if (cam.IsRunning)
{
cam.Stop();
}
}
}
///
/// 打开摄像头
///
///
///
private void btnOpen_Click(object sender, EventArgs e)
{
cam.Start();
if (!timer1.Enabled)
{
timer1.Enabled = true;
}
}
private void Cam_NewFrame(object obj, NewFrameEventArgs eventArgs)
{
this.pictureBox1.Image = (Bitmap)eventArgs.Frame.Clone();
}
public static void writeToFile(ByteMatrix matrix, System.Drawing.Imaging.ImageFormat format, string file)
{
Bitmap bmap = toBitmap(matrix);
bmap.Save(file, format);
}
public static Bitmap toBitmap(ByteMatrix matrix)
{
int width = matrix.Width;
int height = matrix.Height;
Bitmap bmap = new Bitmap(width, height, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
for (int x = 0; x < width; x++)
{
for (int y = 0; y < height; y++)
{
bmap.SetPixel(x, y, matrix.get_Renamed(x, y) != -1 ? ColorTranslator.FromHtml("0xFF000000") : ColorTranslator.FromHtml("0xFFFFFFFF"));
}
}
return bmap;
}
///
/// 扫描识别二维码
///
///
///
private void timer1_Tick(object sender, EventArgs e)
{
//识别图片中的二维码
Image img = this.pictureBox1.Image; ;// Image.FromFile(this.openFileDialog1.FileName);
if (img == null)
return;
Bitmap bmap;
try
{
bmap = new Bitmap(img);
}
catch (System.IO.IOException ioe)
{
MessageBox.Show(ioe.ToString());
return;
}
if (bmap == null)
{
MessageBox.Show("Could not decode image");
return;
}
LuminanceSource source = new RGBLuminanceSource(bmap, bmap.Width, bmap.Height);
com.google.zxing.BinaryBitmap bitmap1 = new com.google.zxing.BinaryBitmap(new HybridBinarizer(source));
Result result;
try
{
result = new MultiFormatReader().decode(bitmap1);
}
catch (ReaderException re)
{
//MessageBox.Show(re.ToString());
return;
}
txtOutputQR.Text = result.Text;
this.timer1.Enabled = false;
this.cam.Stop();
this.pictureBox1.Image = null;
MessageBox.Show("图中二维码：" + result.Text);
}
private void frmMain_Load(object sender, EventArgs e)
{
//初始化AForge内容
Use_Webcams = new FilterInfoCollection(FilterCategory.VideoInputDevice);
if (Use_Webcams.Count > 0)
{
//实例化对象
cam = new VideoCaptureDevice(Use_Webcams[0].MonikerString);
//绑定事件
cam.NewFrame += new NewFrameEventHandler(Cam_NewFrame);
}
}
}
}
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