.NET 6에서 Windows 데스크톱 바코드 및 QR 코드 스캐너를 빌드하는 방법

종속성 설치

dotnet add package OpenCvSharp4.Windows

dotnet add package OpenCvSharp4.Extensions

dotnet add package BarcodeQRCodeSDK

.NET 6에서 Windows 데스크톱 바코드 및 QR 코드 스캐너를 개발하는 단계

1단계: Windows Forms 앱 만들기:

dotnet new winforms -o desktop-barcode-qrcode-scanner
cd desktop-barcode-qrcode-scanner
dotnet add package OpenCvSharp4.Windows
dotnet add package OpenCvSharp4.Extensions
dotnet add package BarcodeQRCodeSDK

using Dynamsoft;
using Result = Dynamsoft.BarcodeQRCodeReader.Result;
using OpenCvSharp;
using OpenCvSharp.Extensions;

public Form1()
{
    InitializeComponent();
    BarcodeQRCodeReader.InitLicense("DLS2eyJoYW5kc2hha2VDb2RlIjoiMjAwMDAxLTE2NDk4Mjk3OTI2MzUiLCJvcmdhbml6YXRpb25JRCI6IjIwMDAwMSIsInNlc3Npb25QYXNzd29yZCI6IndTcGR6Vm05WDJrcEQ5YUoifQ=="); // Get a license key from https://www.dynamsoft.com/customer/license/trialLicense?product=dbr
    reader = BarcodeQRCodeReader.Create();
    capture = new VideoCapture(0);
}

2단계: UI 구성 요소 추가

this.pictureBox1.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
this.pictureBox1.Location = new System.Drawing.Point(13, 12);
this.pictureBox1.Margin = new System.Windows.Forms.Padding(4);
this.pictureBox1.Name = "pictureBox1";
this.pictureBox1.Size = new System.Drawing.Size(640, 640);
this.pictureBox1.SizeMode = System.Windows.Forms.PictureBoxSizeMode.Zoom;
this.pictureBox1.TabIndex = 0;
this.pictureBox1.TabStop = false;

this.button1.AllowDrop = true;
this.button1.AutoEllipsis = true;
this.button1.Font = new System.Drawing.Font("Microsoft Sans Serif", 20.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
this.button1.Location = new System.Drawing.Point(667, 12);
this.button1.Margin = new System.Windows.Forms.Padding(4);
this.button1.Name = "button1";
this.button1.Size = new System.Drawing.Size(333, 79);
this.button1.TabIndex = 1;
this.button1.Text = "Camera Scan";
this.button1.UseVisualStyleBackColor = true;
this.button1.Click += new System.EventHandler(this.button_Click);

private void button_Click(object sender, EventArgs e)
{
    if (!capture.IsOpened())
    {
        MessageBox.Show("Failed to open video stream or file");
        return;
    }

    if (button2.Text == "Camera Scan")
    {
        StartScan();
    }
    else {
        StopScan();
    }
}

3단계: PictureBox에 카메라 비디오 스트림 표시

private void StartScan() {
    button2.Text = "Stop";
    isCapturing = true;
    thread = new Thread(new ThreadStart(FrameCallback));
    thread.Start();
}

private void StopScan() {
    button2.Text = "Camera Scan";
    isCapturing = false;
    if (thread != null) thread.Join();
}

private void FrameCallback() {
    while (isCapturing) {
        Mat frame = new Mat();
        capture.Read(frame);
        pictureBox1.Image = BitmapConverter.ToBitmap(frame);
    }
}

4단계: 카메라 비디오 스트림에서 바코드 및 QR 코드 디코딩

Result[]? results = reader.DecodeBuffer(mat.Data, mat.Cols, mat.Rows, (int)mat.Step(), BarcodeQRCodeReader.ImagePixelFormat.IPF_RGB_888);

private Bitmap DecodeMat(Mat mat)
{
    Result[]? results = reader.DecodeBuffer(mat.Data, mat.Cols, mat.Rows, (int)mat.Step(), BarcodeQRCodeReader.ImagePixelFormat.IPF_RGB_888);
    if (results != null)
    {
        foreach (Result result in results)
        {
            string output = "Text: " + result.Text + Environment.NewLine + "Format: " + result.Format1 + Environment.NewLine;
            textBox1.AppendText(output);
            textBox1.AppendText(Environment.NewLine);
            int[]? points = result.Points;
            if (points != null)
            {
                OpenCvSharp.Point[] all = new OpenCvSharp.Point[4];
                int xMin = points[0], yMax = points[1];
                all[0] = new OpenCvSharp.Point(xMin, yMax);
                for (int i = 2; i < 7; i += 2)
                {
                    int x = points[i];
                    int y = points[i + 1];
                    OpenCvSharp.Point p = new OpenCvSharp.Point(x, y);
                    xMin = x < xMin ? x : xMin;
                    yMax = y > yMax ? y : yMax;
                    all[i / 2] = p;
                }
                OpenCvSharp.Point[][] contours = new OpenCvSharp.Point[][] { all };
                Cv2.DrawContours(mat, contours, 0, new Scalar(0, 0, 255), 2);
                if (result.Text != null) Cv2.PutText(mat, result.Text, new OpenCvSharp.Point(xMin, yMax), HersheyFonts.HersheySimplex, 1, new Scalar(0, 0, 255), 2);
            }
        }
    }
    else
    {
        textBox1.AppendText("No barcode detected!" + Environment.NewLine);
    }

    Bitmap bitmap = BitmapConverter.ToBitmap(mat);
    return bitmap;
}

- pictureBox1.Image = BitmapConverter.ToBitmap(frame);
+ pictureBox1.Image = DecodeMat(mat);

dotnet run

소스 코드

svn checkout https://github.com/yushulx/dotnet-barcode-qr-code-sdk/trunk/example/desktop-gui