using IronBarCode; using System.Drawing; // Creating a barcode is as simple as: var myBarcode = BarcodeWriter.CreateBarcode("12345", BarcodeWriterEncoding.EAN8); // And save our barcode as in image: myBarcode.SaveAsImage("EAN8.jpeg"); Image myBarcodeImage = myBarcode.Image; // Can be used as Image Bitmap myBarcodeBitmap = myBarcode.ToBitmap(); // Can be used as Bitmap // Reading a barcode is easy with IronBarcode: var resultFromFile = BarcodeReader.Read(@"file/barcode.png"); // From a file var resultFromBitMap = BarcodeReader.Read(new Bitmap("barcode.bmp")); // From a bitmap var resultFromImage = BarcodeReader.Read(Image.FromFile("barcode.jpg")); // From an image var resultFromPdf = BarcodeReader.ReadPdf(@"file/mydocument.pdf"); // From PDF use ReadPdf // After creating a barcode, we may choose to resize and save which is easily done with: var myNewBarcode = BarcodeWriter.CreateBarcode("12345", BarcodeWriterEncoding.EAN8); myNewBarcode.ResizeTo(400, 100); myNewBarcode.SaveAsImage("myBarcodeResized.jpeg"); // To set more options and optimization with your Barcode Reading, // Please utilize the BarcodeReaderOptions paramter of read: var myOptionsExample = new BarcodeReaderOptions { // Choose a speed from: Faster, Balanced, Detailed, ExtremeDetail // There is a tradeoff in performance as more Detail is set Speed = ReadingSpeed.Balanced, // Reader will stop scanning once a barcode is found, unless set to true ExpectMultipleBarcodes = true, // By default, all barcode formats are scanned for. // Specifying one or more, performance will increase. ExpectBarcodeTypes = BarcodeEncoding.AllOneDimensional, // Utilizes multiple threads to reads barcodes from multiple images in parallel. Multithreaded = true, // Maximum threads for parallel. Default is 4 MaxParallelThreads = 2, // The area of each image frame in which to scan for barcodes. // Will improve performance significantly and avoid unwanted results and avoid noisy parts of the image. CropArea = new Rectangle(), // Special Setting for Code39 Barcodes. // If a Code39 barcode is detected. Try to use extended mode for the full ASCII Character Set UseCode39ExtendedMode = true }; // And, apply: var results = BarcodeReader.Read("barcode.png", myOptionsExample);

using IronBarCode; using System.Drawing; /*** CREATING BARCODE IMAGES ***/ // Shorthand:: Create and save a barcode in a single line of code BarcodeWriter.CreateBarcode("12345", BarcodeWriterEncoding.EAN8).ResizeTo(400, 100).SaveAsImage("EAN8.jpeg"); /***** IN-DEPTH BARCODE CREATION OPTIONS *****/ // BarcodeWriter.CreateBarcode creates a GeneratedBarcode which can be styles and exported as an Image object or File GeneratedBarcode MyBarCode = BarcodeWriter.CreateBarcode("Any Number, String or Binary Value", BarcodeWriterEncoding.Code128); // Style the Barcode in a fluent LINQ style fashion MyBarCode.ResizeTo(300, 150).SetMargins(20).AddAnnotationTextAboveBarcode("Example EAN8 Barcode").AddBarcodeValueTextBelowBarcode(); MyBarCode.ChangeBackgroundColor(Color.LightGoldenrodYellow); // Save MyBarCode as an image file MyBarCode.SaveAsImage("MyBarCode.png"); MyBarCode.SaveAsGif("MyBarCode.gif"); MyBarCode.SaveAsHtmlFile("MyBarCode.html"); MyBarCode.SaveAsJpeg("MyBarCode.jpg"); MyBarCode.SaveAsPdf("MyBarCode.Pdf"); MyBarCode.SaveAsPng("MyBarCode.png"); MyBarCode.SaveAsTiff("MyBarCode.tiff"); MyBarCode.SaveAsWindowsBitmap("MyBarCode.bmp"); // Save MyBarCode as a .NET native objects Image MyBarCodeImage = MyBarCode.Image; Bitmap MyBarCodeBitmap = MyBarCode.ToBitmap(); byte[] PngBytes = MyBarCode.ToPngBinaryData(); using (System.IO.Stream PdfStream = MyBarCode.ToPdfStream()) { // Stream barcode image output also works for GIF,JPEG, PDF, PNG, BMP and TIFF } // Save MyBarCode as HTML files and tags MyBarCode.SaveAsHtmlFile("MyBarCode.Html"); string ImgTagForHTML = MyBarCode.ToHtmlTag(); string DataURL = MyBarCode.ToDataUrl(); // Save MyBarCode to a new PDF, or stamp it in any position on any page(s) of an existing Document MyBarCode.SaveAsPdf("MyBarCode.Pdf"); MyBarCode.StampToExistingPdfPage("ExistingPDF.pdf", 200, 50, 1); // position 200x50 on page 1 MyBarCode.StampToExistingPdfPages("ExistingPDF.pdf", 200, 50, new[] { 1, 2, 3 }, "Password123"); // multiple pages of an encrypted PDF

using IronBarCode; using System; using System.Drawing; /*** STYLING GENERATED BARCODES ***/ // BarcodeWriter.CreateBarcode creates a GeneratedBarcode object which allows the barcode to be styled and annotated. GeneratedBarcode MyBarCode = BarcodeWriter.CreateBarcode("Iron Software", BarcodeWriterEncoding.QRCode); // Any text (or commonly, the value of the barcode) can be added to the image in a default or specified font. // Text positions are automatically centered, above or below. Fonts that are too large for a given image are automatically scaled down. MyBarCode.AddBarcodeValueTextBelowBarcode(); MyBarCode.AddAnnotationTextAboveBarcode("This is My Barcode", new Font(new FontFamily("Arial"), 12, FontStyle.Regular, GraphicsUnit.Pixel), Color.DarkSlateBlue); // Resize, add Margins and Check final Image Dimensions MyBarCode.ResizeTo(300, 300); // pixels MyBarCode.SetMargins(0, 20, 0, 20); int FinalWidth = MyBarCode.Width; int FinalHeight = MyBarCode.Height; //Recolor the barcode and its background MyBarCode.ChangeBackgroundColor(Color.LightGray); MyBarCode.ChangeBarCodeColor(Color.DarkSlateBlue); if (!MyBarCode.Verify()) { Console.WriteLine("Color contrast should be at least 50% or a barcode may become unreadable. Test using GeneratedBarcode.Verify()"); } // Finally save the result MyBarCode.SaveAsHtmlFile("StyledBarcode.html"); /*** STYLING BARCODES IN A SINGLE LINQ STYLE EXPRESSION ***/ // Fluent API BarcodeWriter.CreateBarcode("https://ironsoftware.com", BarcodeWriterEncoding.Aztec).ResizeTo(250, 250).SetMargins(10).AddBarcodeValueTextAboveBarcode().SaveAsImage("StyledBarcode.png"); /*** STYLING QR CODES WITH LOGO IMAGES OR BRANDING ***/ // Use the QRCodeWriter.CreateQrCodeWithLogo Method instead of BarcodeWriter.CreateBarcode // Logo will automatically be sized appropriately and snapped to the QR grid. var qrCodeLogo = new QRCodeLogo("ironsoftware_logo.png"); GeneratedBarcode myQRCodeWithLogo = QRCodeWriter.CreateQrCodeWithLogo("https://ironsoftware.com/", qrCodeLogo); myQRCodeWithLogo.ResizeTo(500, 500).SetMargins(10).ChangeBarCodeColor(Color.DarkGreen); myQRCodeWithLogo.ResizeTo(500, 500).SetMargins(10).ChangeBarCodeColor(Color.DarkGreen); myQRCodeWithLogo.SaveAsPng("QRWithLogo.Png").SaveAsPdf("MyVerifiedQR.html"); // save as 2 formats

Published May 12, 2022

QR Code Reader from Image Online Tools

The term QR code stands for Quick Response Code. QR codes are 2D barcodes that are readable by smartphones and other devices. They can be used to store a large amount of information in a small space, and are often used to display text, contact information, binary code, or links to websites. QR codes were first invented in 1994 by Denso Wave Inc. They were designed as a type of barcode that could be read electronically with the help of a scanner or camera. A QR code works in the same way as a barcode at the supermarket. It is a machine-scannable image that can instantly be read using a smartphone native camera app.

QR codes have become more necessary in our society because they can store so much information, and they have become more accessible with the invention of smartphones and other devices. They are also helpful for businesses because it allows them to put their contact information on all of their marketing materials, which leads to higher customer conversion rates from marketing efforts.

QR codes have become a vital part of our lives as they can be found on most products, advertisements, and even business cards. The QR code has been used for years but became popular in recent years due to smartphones being able to scan them. We can scan QR codes using the Google Lens app on a mobile phone. It is available in the Google Photos app.

There are more online QR code tools for scanning QR codes. Let's have a look at them:

Online QR code reader:

4qrcode:

4qrcode is a handy tool that can create and scan QR codes. You just need to enter information (such as a URL) and the software automatically generates your own QR code. Also, you can save them in different formats such as PNG, JPEG, SVG, and EPS. We want you to make sure that you remember what kind of content you want to encode in it. Input text can be any type of information. Examples of input are text, numbers, a website link, an image, or even a video. QR codes with different types of content can be generated depending on the service. There are many types of QR codes, so be sure to use the right one. You can try to find a QR code generator that suits your options.

Let's see how we can scan QR codes using 4qrcode:

Go to the 4qrcode website.

Click on the File icon and select the QR code image. You can drag and drop the image file.
When you select the image, it will automatically decode and show the output in the next box.

ZXing Decoder Online

ZXing Decoder Online is an online barcode and QR code scanner. Simply upload PNG or other formats of the image of the QR code, and it will begin decoding. Similarly, you can create a QR code for any information. Mostly that information will be URL or text that you want to encode in a QR code.

Let's look at how we can use the ZXing online decoder:

Open the ZXing Decodere website.

Click on the Choose File button and choose a QR image file. After selecting the image, click the submit button. It will begin reading for code. If there is a recognizable code, it will read QR codes and display the result.

We have seen how we can easily scan QR codes using the ZXing QR code app.

IMGonline.com.ua

IMGonline is an amazing tool that can decode QR Codes online. It will scan QR codes and show the decoded value. Let's look at how to do it:

Go to the IMGonline website.

Click the Choose File button, and select the QR code image. You can choose image formats such as BMP, GIF, JPEG, PNG, and TIFF format.
After selecting the QR code icon image, click the OK button. It will begin processing the QR code and show the QR code details on the next page.

This is how we can see what details a QR code consists of, online, and for free.

IronBarcode: C# Barcode Library

IronBarcode is the first and only barcode library for C programmers. It provides a simple API for generating barcodes in C. It also has a QR code reader and QR code generator which can be used to read and generate QR codes in C programs. The IronBarcode library can parse barcodes in PNG, JPEG, GIF, BMP, and TIFF formats. It can also generate the same barcode types. IronBarcode also has a built-in QR code generator.

IronBarcode includes a BarcodeReader class, a BarcodePrint class, and custom Xamarin.Forms barcodes. It also includes new colors to select in the Barcode class, in addition to the existing black, white, and red colors already provided in IronBarcode, new colors were introduced to support skin shades and hair colors: medium tan, light tan, dark brown, dark blond/brown mix, light blond/brown mix.

Let's look at how we can read a QR code using the IronBarcode library:

BarcodeResult Result = BarcodeReader.QuicklyReadOneBarcode("QuickStart.jpg");
if(Result != null){
    Console.WriteLine(Result.Text)  
}

BarcodeResult Result = BarcodeReader.QuicklyReadOneBarcode("QuickStart.jpg");
if(Result != null){
    Console.WriteLine(Result.Text)  
}

Dim Result As BarcodeResult = BarcodeReader.QuicklyReadOneBarcode("QuickStart.jpg")
If Result IsNot Nothing Then
	Console.WriteLine(Result.Text)
End If

VB C#

This is a very simple way to read a QR code using the IronBarcode library. The QuicklyReadOneBarcode() function will read the QR code and store the output in the Result variable. We can improve the working by following this code:

ReadArea = new System.Drawing.Rectangle(100,200,300,400);
BarcodeResult Result = BarcodeReader.QuicklyReadOneBarcode("QuickStart.jpg", ReadArea, BarcodeEncoding.QRCode | BarcodeEncoding.Code128);
if(Result != null){
    Console.WriteLine(Result.Text)  
}

ReadArea = new System.Drawing.Rectangle(100,200,300,400);
BarcodeResult Result = BarcodeReader.QuicklyReadOneBarcode("QuickStart.jpg", ReadArea, BarcodeEncoding.QRCode | BarcodeEncoding.Code128);
if(Result != null){
    Console.WriteLine(Result.Text)  
}

ReadArea = New System.Drawing.Rectangle(100,200,300,400)
Dim Result As BarcodeResult = BarcodeReader.QuicklyReadOneBarcode("QuickStart.jpg", ReadArea, BarcodeEncoding.QRCode Or BarcodeEncoding.Code128)
If Result IsNot Nothing Then
	Console.WriteLine(Result.Text)
End If

VB C#

The following code will increase the speed and accuracy of reading barcodes by specifying the specific area of the QR code. We can specify a specific barcode format (or formats) so that Iron Barcode doesn't have to try for every single type of barcode known. You can get more information from this link.

The IronBarcode library is free for personal use, but if you are a developer, you need to purchase a license from IronBarcode to use it in your commercial projects. It also has a free trial to use in production without any watermark. You can access the trial without any payment information. Once you have decided to buy the software, go to this link and choose the plan according to your choice.