太神奇了！使用C#实现自动核验健康码：(1)二维码识别

VideoCaptureDevice _camera;
private void button1_Click(object sender, EventArgs e)
{
    _camera = new VideoCaptureDevice(new FilterInfoCollection(FilterCategory.VideoInputDevice)[0].MonikerString);
    _camera.NewFrame += camera_NewFrame;
    _camera.Start();
    timer1.Enabled = true;
}

private void camera_NewFrame(object sender, AForge.Video.NewFrameEventArgs eventArgs)
{
    //将摄像头每帧图像显示到pictureBox
    pictureBox1.Image = (Bitmap)eventArgs.Frame.Clone();       
}

private void timer1_Tick(object sender, EventArgs e)
{
    if (pictureBox1.Image != null)
    {
        var img = (Bitmap)pictureBox1.Image.Clone();
        var barcodeReader = new BarcodeReader();
        var result = barcodeReader.Decode(img);
        if (result != null)
        {
            var healthCode = JsonConvert.DeserializeAnonymousType(result.Text,
                 new { Color = "" });
            if (healthCode != null)
            {
                var color = healthCode.Color;
                if (color == "green")
                {
                    label1.Text = "绿码";
                    label1.ForeColor = Color.Green;
                }
                else if (color == "red")
                {
                    label1.Text = "红码";
                    label1.ForeColor = Color.Red;
                }
                else if (color == "yellow")
                {
                    label1.Text = "黄码";
                    label1.ForeColor = Color.Yellow;
                }
                else
                {
                    label1.Text = "异常";
                }
            }
        }
    }
}