Read Specific text from scanned pdf document

Archit Shrivastava

Hi all,

Is there any way to read specific text from scanned pdf document...i have multiple document of multiple user in one pdf..now my need is i want to separate user document and create a new pdf for every user.

5 Replies

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Leon D7y ago
Accepted answer
Check the following articles:
https://www.e-iceblue.com/Tutorials/Spire.PDF/Spire.PDF-Program-Guide/Extract/Read/Extract-Text-from-a-Specific-Rectangular-Area-in-PDF-using-C.html

https://www.e-iceblue.com/Tutorials/Spire.PDF/Spire.PDF-Program-Guide/Document-Operation/Split-PDF-into-Multiple-PDFs-using-a-Range-of-Pages-in-C-VB.NET.html
+1
Mohamed Abedallah7y ago
Since the PDF files you are using are scanned documents, this means that the PDF files you have are Raster PDF and you need use OCR to extract the text form it.
Once you get the text from the document, you can search the resulting text for the words you need and then decide what you want to do with the PDF.

The following C# code shows how you can do this using LEADTOOLS functions:
RasterImage _ocrimage = null;

using (IOcrEngine ocrEngine = OcrEngineManager.CreateEngine(OcrEngineType.LEAD, false))
{
ocrEngine.Startup(null, null, null, null);
using (IOcrDocument ocrDocument = ocrEngine.DocumentManager.CreateDocument())
{
using (RasterCodecs codecs = new RasterCodecs())
{
_ocrimage = codecs.Load(@"C:\Source.pdf");
if (_ocrimage != null)
{
//Pass the processed image to the OCR engine
using (IOcrPage ocrPage = ocrDocument.Pages.AddPage(_ocrimage, null))
{
ocrPage.AutoZone(null);
ocrPage.Recognize(null);
Console.WriteLine(ocrPage.GetText(-1));
}
_ocrimage.Dispose();
}
}
}
}
You can find more information here:
https://www.leadtools.com/help/leadtools/v20/dh/fo/iocrpage.html
https://www.leadtools.com/help/leadtools/v20/dh/to/recognizing-ocr-pages.html

LEADTOOLS also has OCR Cloud Web API:
https://services.leadtools.com/features/ocr
0
Amit Gupta7y ago
Try https://www.google.com/search?q=read+pdf+using+itextsharp+c%23
0
Archit Shrivastava7y ago
can u please share any link or refrences...
0
Amit Gupta7y ago
Use itextsharp for that.
0