Read Barcodes from Images in C#

Or download the DLL directly here

Barcode Quickstart See All 9 Code Examples

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);

Install-Package BarCode

Imperfect Barcodes and Image Correction See All 9 Code Examples

using IronBarCode;
using IronSoftware.Drawing;
using System.Linq;

// Choose which filters are to be applied (in order);
var filtersToApply = new ImageFilterCollection() {
    new SharpenFilter(),
    new InvertFilter(),
    new ContrastFilter(),
    new BrightnessFilter(),
    new AdaptiveThresholdFilter(),
    new BinaryThresholdFilter()
};

BarcodeReaderOptions myOptionsExample = new BarcodeReaderOptions()
{
    // Set chosen filters in BarcodeReaderOptions:
    ImageFilters = filtersToApply,

    // Other Barcode Reader Options:
    Speed = ReadingSpeed.Balanced,
    ExpectMultipleBarcodes = true,
};

// And, apply with a Read:
BarcodeResults results = BarcodeReader.Read("screenshot.png", myOptionsExample);

AnyBitmap[] filteredImages = results.FilterImages();

// Export file to disk
for (int i = 0 ; i < filteredImages.Count() ; i++)
    filteredImages[i].SaveAs($"{i}_barcode.png");

// Or
results.ExportFilterImagesToDisk("filter-result.jpg");

Install-Package BarCode

Creating Barcodes Images See All 9 Code Examples

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

Install-Package BarCode

Barcode Styling & Annotation See All 9 Code Examples

using IronBarCode;
using System;
using System.Drawing;

/*** STYING 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");

/*** STYING 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");

/*** STYING 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

Install-Package BarCode

Export Barcodes as HTML See All 9 Code Examples

using IronBarCode;

/*** EXPORTING BARCODES AS HTML FILES OR TAGS ***/

GeneratedBarcode MyBarCode = BarcodeWriter.CreateBarcode("1234567890", BarcodeWriterEncoding.Code128);

// Save as a stand-alone HTML file with no image assets required
MyBarCode.SaveAsHtmlFile("MyBarCode.html");

// Save as a stand-alone HTML image tag which can be served in HTML files, ASPX or MVC Views.  No image assets required, the tag embeds the entire image in its Src contents
string ImgTag = MyBarCode.ToHtmlTag();

// Turn the image into an Html/CSS Data URI.  https://en.wikipedia.org/wiki/Data_URI_scheme
string DataURI = MyBarCode.ToDataUrl();