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Then, loop through all the pages and call the Process() method to render into the stream.Next, create an instance of the PngDevice class.
We can read barcodes from converted PDF pages as PNG images by following the steps given below: It allows converting pages of the PDF document into PNG images. The only difference is that in this method, we will convert the pages of the PDF document into images using the PngDevice class of the API. Here goes another method similar to the previous one. Read Barcodes from PDF using PngDevice in C#
The following code example shows how to convert PDF pages into images and read barcodes using C#.
Then, create an instance of the BarCodeReader class with the stream object. 
Next, save the image to stream in a loop. Then, call the DoConvert() method to render selected pages into images. Next, specify StartPage and EndPage to render a range of pages into images. Optionally, set rendering options such as BarcodeOptimization. Next, create an instance of the PdfConverter class. We can read barcodes from converted PDF pages by following the steps given below: It allows converting each page of a PDF file to an image, and then we will read the barcode information from the converted image. We can read barcodes from the PDF document by converting PDF pages into images using the PdfConverter class. Convert PDF to Image and Read Barcodes using C# Please download the input PDF document with Barcodes used in this blog post. Codetext found: Aspose.Barcode Pdf417 ExampleĬodetext found: Aspose.Barcode QR ExampleĬodetext found: Aspose.Barcode DataMatrix Example The following code example shows how to read a barcode from a PDF document using C#. After that, call the ReadBarCodes() method to get the BarCodeResult object. Then, create an instance of the BarCodeReader class with a stream object. Next, loop through all the pages and render them to the memory stream. Firstly, load a PDF document using the Document class. We can read barcode images embedded on any of the pages of the PDF document by following the steps given below: The BarCodeResult class stores detected barcode information such as barcode type, code text, region and other parameters. The BarCodeReader class of the Aspose.BarCode API enables us to perform ReadBarCodes operations to detect barcodes. The ConvertToPNGMemoryStream() function of the API renders a PDF page into a PNG memory stream. The Document class of the Aspose.PDF API represents a PDF document. Please either download the DLL of the API or install it using NuGet. After that, we will read the barcode from the rendered images using the Aspose.BarCode for. NET API to load a PDF document, then we will render its pages to raster images. Firstly, we will be using the Aspose.PDF for. We will follow a two-step procedure to read barcodes from PDF documents. The article shall cover the following topics: In this article, we will learn how to read a barcode from a PDF document using C#. It helps to decode embedded information in the form of barcodes and QR codes from PDF documents such as invoices, receipts, or reports. In certain cases, we may need to detect and read the barcodes embedded into PDF documents programmatically. We can generate and add barcodes to PDF documents as described in my previous post.
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