Set PDF Barcode Reader Options
using IronBarCode;

PdfBarcodeReaderOptions myPdfOptionsExample = new PdfBarcodeReaderOptions()
{
    // The password string to open the PDF if there is one
    Password = "password123",

    // Pages of the PDF you want to scan
    PageNumbers = new[] { 1, 3 },

    // By default, all barcode formats are scanned for
    // Specifying a subset of barcode types to search for would improve performance
    ExpectBarcodeTypes = BarcodeEncoding.AllOneDimensional,

    // The DPI (dots per inch) to render each barcode image for reading
    DPI = 72,

    // The scaling factor to scale the width and height when converting the PDF to image
    // Default is 3.5 for both dimensions
    Scale = 4
};

// Read the pdf with the options applied
var results = BarcodeReader.ReadPdf("barcode.pdf", myPdfOptionsExample);
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Set PDF Barcode Reader Options

Set PDF Barcode Reader Options

IronBarcode has a variety of options in the PdfBarcodeReaderOptions class to support customized and optimized reads for PDFs specifically. This will handle PDF passwords, choose which pages to scan, the DPI to parse the PDF in, and any additional scaling needed to improve the read quality.

Key Points

  1. Creating PdfBarcodeReaderOptions:
    • An instance of PdfBarcodeReaderOptions is created to set various options for PDF processing:
      • DPI: Sets the resolution for PDF parsing. Higher DPI can improve barcode detection accuracy.
      • PageNumbers: Specifies the PDF pages that should be scanned. This can be customized to target specific pages.
      • Password: If the PDF is password-protected, the correct password can be provided using this option.
      • Scale: This option (default 3.5) allows adjusting the scale of the PDF image to help in enhancing the barcode detection accuracy.
  2. Reading Barcodes:
    • The BarcodeReader.ReadPdf method is used to read and decode barcodes from the PDF file. It utilizes the options specified.
  3. Iterating and Displaying Results:
    • A foreach loop iterates over the barcode results, displaying each barcode's Type and Value on the console.
    • This ensures that all detected barcodes from the specified pages are outputted for verification or further processing.
Learn how to read barcodes from PDFs with C#
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