How to read text on PDF file and Image File using C# ?

tushar gawande

9y8.4k.NET

HI,

We have an application which Gets a Scanned paper PDF files,

Our requirement is to read the text present on those files and Save that text while user Uploads a PDF at that time.

Is it possible to do with.Net or please tell me if any other approaches are available.

5 Replies

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Tony Chen8y ago
Read text on PDF file using c#, try iDiTect.Converter https://www.iditect.com/tutorial/pdf-to-text/
PdfToTxtConverter converter = new PdfToTxtConverter();
converter.Load(File.ReadAllBytes("sample.pdf"));

for (int i = 0; i < converter.PageCount; i++)
{
    //Extract each page text from PDF with original layout
    string pageText = converter.PageToText(i);
}
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Brijesh Patil8y ago
Hello,
How can we extract text from edited PDF files. because edted pdf can not be extracted by this code nad itextsharp.dll also.

Do you have any idea. Please let me know.
+1
Kim Black8y ago
Just use ZetPDF.com , it will help you
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Mohamed Abedallah9y ago
With LEADTOOLS OCR features you can recognize text from almost all common image formats along with PDF files.
You can achieve that using LEADTOOLS with .NET code similar to this:
IOcrEngine _ocrEngine;
_ocrEngine = OcrEngineManager.CreateEngine(OcrEngineType.Advantage, false);
_ocrEngine.Startup(null, null, null, null);
IOcrDocument ocrDoc = _ocrEngine.DocumentManager.CreateDocument();
ocrDoc.Pages.AddPage(inputFileName, null);
ocrDoc.Pages[0].Recognize(null);
// Save the result to a disk as plain text
string outputFileName = "output.txt";
ocrDoc.Save(outputFileName, Leadtools.Forms.DocumentWriters.DocumentFormat.Text, null);
_ocrEngine.Shutdown();
To see how it works, check this link:
http://demo.leadtools.com/JavaScript/OCR/index.html
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Nilesh Patil9y ago
Hi Tushar,

Refer below links

https://www.e-iceblue.com/Tutorials/Spire.PDF/Spire.PDF-Program-Guide/Read-PDF-Read-PDF-Images-and-Text-in-C-VB.NET.html

http://www.nullskull.com/q/10465415/read-image-text-from-pdf-file-to-itextsharp-in-aspnet-c.aspx
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