中兴网生成的二维码中添加自定义图片或文字 [英] Add custom image or text to QR code generated by ZXing.Net

问题描述

我使用如下:

更新:

在 QR 码中嵌入自定义徽标(不破坏后者！)似乎不是一项微不足道的任务，因为科学出版物 QR 图像:优化图像嵌入 QR 码 显示...

但我还是想知道我是否可以生成一个二维码(如上面的源代码)，然后用自定义文本或徽标覆盖它，然后通过 ZXing.Net 再次验证生成的图像.

解决方案

我们开始吧(您可以使用任何徽标):

using System.Collections.Generic;使用 System.Drawing；使用 System.Windows.Forms;使用ZXing；使用 ZXing.QrCode.Internal;使用 ZXing.Rendering;命名空间测试{公共部分类 Form1 :表单{私有字符串 imagePath = @"YourPath";私人字符串 url = @"https://en.WIKIPEDIA.ORG/";私有整数大小 = 400；公共 Form1(){初始化组件();pictureBox1.Image = GenerateQR(size, size, url);图片框1.高度=大小；pictureBox1.Width = 大小；Console.WriteLine(checkQR(new Bitmap(pictureBox1.Image)));}public bool checkQR(位图二维码){var reader = new BarcodeReader();var 结果 = reader.Decode(QrCode);如果(结果 == 空)返回假；返回 result.Text == url;}public Bitmap GenerateQR(int width, int height, string text){var bw = new ZXing.BarcodeWriter();var encOptions = new ZXing.Common.EncodingOptions{宽度 = 宽度，高度 = 高度，保证金 = 0,PureBarcode = 假};encOptions.Hints.Add(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);bw.Renderer = new BitmapRenderer();bw.Options = encOptions;bw.Format = ZXing.BarcodeFormat.QR_CODE;位图 bm = bw.Write(text);位图叠加 = 新位图 (imagePath);int deltaHeigth = bm.Height - overlay.Height;int deltaWidth = bm.Width - overlay.Width;图形 g = Graphics.FromImage(bm);g.DrawImage(overlay, new Point(deltaWidth/2,deltaHeigth/2));返回 bm;}}

结果:

和输出:

<块引用>

正确

I use ZXing.Net library to generate a QR code image -

At the top of my class:

    [System.Runtime.InteropServices.DllImport("gdi32.dll")]
    public static extern bool DeleteObject(IntPtr hObject);

My method:

    protected void UpdateQRSource(String address)
    {
        QRCodeWriter qrcode = new QRCodeWriter();
        BarcodeWriter barcodeWriter = new BarcodeWriter
        {
            Format = BarcodeFormat.QR_CODE,
            Options = new EncodingOptions
            {
                Width = 300,
                Height = 300,
                Margin = 4
            }
        };

        using (Bitmap bitmap = barcodeWriter.Write(address))
        {
            IntPtr hbmp = bitmap.GetHbitmap();
            try
            {
                BitmapSource source = Imaging.CreateBitmapSourceFromHBitmap(
                    hbmp, 
                    IntPtr.Zero, 
                    Int32Rect.Empty,
                    BitmapSizeOptions.FromEmptyOptions());
                qrImage.Source = source; // set WPF image source
            }
            finally
            {
                DeleteObject(hbmp);
            }
        }
    }

Please advise me how to add short text string or a custom image in the middle of the QR code - similar to the Wikipedia visual QR code below:

UPDATE:

Embedding custom logo in QR code (without breaking the latter!) seems to be not a trivial task as the scientific publication QR Images: Optimized Image Embedding in QR Codes shows...

But I still wonder if I could generate a QR code (as in the above source code), then overlay it with a custom text or logo, then validate the resulting image again by ZXing.Net.

解决方案

Here we go (you can use any logo):

using System.Collections.Generic;
using System.Drawing;
using System.Windows.Forms;
using ZXing;
using ZXing.QrCode.Internal;
using ZXing.Rendering;


namespace Test
{
    public partial class Form1 : Form
{

    private string imagePath = @"YourPath";
    private string url = @"https://en.WIKIPEDIA.ORG/";
    private int size = 400;
    public Form1()
    {
        InitializeComponent();

        pictureBox1.Image = GenerateQR(size, size, url);
        pictureBox1.Height = size;
        pictureBox1.Width = size;
        Console.WriteLine(checkQR(new Bitmap(pictureBox1.Image)));
    }

    public bool checkQR(Bitmap QrCode)
    {
        var reader = new BarcodeReader();
        var result = reader.Decode(QrCode);
        if (result == null)
            return false;
        return result.Text == url;
    }


    public Bitmap GenerateQR(int width, int height, string text)
    {
        var bw = new ZXing.BarcodeWriter();

        var encOptions = new ZXing.Common.EncodingOptions
        {
            Width = width,
            Height = height,
            Margin = 0,
            PureBarcode = false
        };

        encOptions.Hints.Add(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);

        bw.Renderer = new BitmapRenderer();
        bw.Options = encOptions;
        bw.Format = ZXing.BarcodeFormat.QR_CODE;
        Bitmap bm = bw.Write(text);
        Bitmap overlay = new Bitmap(imagePath);

        int deltaHeigth = bm.Height - overlay.Height;
        int deltaWidth = bm.Width - overlay.Width;

        Graphics g = Graphics.FromImage(bm);
        g.DrawImage(overlay, new Point(deltaWidth/2,deltaHeigth/2));

        return bm;
    }

}

The result:

And the output:

True

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