QR码网络摄像头扫描仪C# [英] QR code webcam scanner c#

问题描述

我尝试了各种 QR代码库和网络摄像头捕获技术.在特定时间间隔内捕获照片，然后将其发送到 QR code 库似乎是一个好主意，但是检测 QR code 的成功率却非常低.谁能推荐一种更好的方法来通过网络摄像头检测 QR码?非常感谢:)

I Have tried various QR code libraries and webcam capturing techniques. Capturing photos within a specific time interval and then sending it to the QR code library seemed as a good idea but the success ratio for detecting the QR code is extremely low. Could anyone recommend a better approach for detecting the QR code through webcam? Thanks a lot :)

代码:

void FinalVideo_NewFrame(对象发送者，NewFrameEventArgs eventArgs) {

void FinalVideo_NewFrame(object sender, NewFrameEventArgs eventArgs) {

        Bitmap video = (Bitmap)eventArgs.Frame.Clone();

        pictureBox1.Image = video;
        try
        {
            com.google.zxing.qrcode.decoder.Decoder objDecoder = new com.google.zxing.qrcode.decoder.Decoder();
            Bitmap bitmap = new Bitmap(pictureBox1.Image);
            com.google.zxing.LuminanceSource source = new RGBLuminanceSource(bitmap, bitmap.Width,bitmap.Height); 
            var binarizer = new HybridBinarizer(source);
            var binBitmap = new BinaryBitmap(binarizer);
            QRCodeReader qrCodeReader = new QRCodeReader();
            string str = new MultiFormatReader().decode(binBitmap).Text;
            MessageBox.Show(str);

        }
        catch
        {

        }

}

我还使用了messages.toolkit.qrcode.dll. 代码如下:

I also used messaging.toolkit.qrcode.dll. The code follows:

private void mainWinForm_Load(对象发送者，EventArgs e)

private void mainWinForm_Load(object sender, EventArgs e)

    {

        webcam = new WebCam();
        webcam.InitializeWebCam(ref imgVideo);
        QRCodeDecoder decoder = new QRCodeDecoder();
        try
        {

            MessageBox.Show(decoder.decode(new QRCodeBitmapImage(imgCapture.Image as Bitmap)));
        }

        catch
        {
            //Do nothing
        }

    }

推荐答案

尝试使用AForge.NET库从网络摄像头捕获视频，然后使用ZXing.Net库读取QR码.

Try using AForge.NET library for capturing the video from your webcam, and then ZXing.Net library for reading the QR codes.

您可以按照以下类似的Youtube教程进行操作，这些教程将展示如何使用AForge.Net从网络摄像头获取视频. https://www.youtube.com/watch?v=osAOpsRYqVs&t= 311s

You can follow some Youtube tutorials like these that will show how to get video from the webcam using AForge.Net . https://www.youtube.com/watch?v=osAOpsRYqVs&t=311s

对于QRs解码，我使用以下代码，每1秒执行一次:

As for the QRs decoding I used the following code which I execute every 1 second:

`

    private void decode_QRtag()
    {
        try
        {
            //pictureBox1 shows the web cam video
            Bitmap bitmap = new Bitmap(pictureBox1.Image);

            BarcodeReader reader = new BarcodeReader { AutoRotate = true, TryHarder = true };
            Result result = reader.Decode(bitmap);
            string decoded = result.ToString().Trim();        
            //capture a snapshot if there is a match
            PictureBox2.Image = bitmap;
            textBox1.Text = decoded;
        }
        catch 
        {
        }
    }`

这篇关于QR码网络摄像头扫描仪C#的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！