Read Specific text from scanned pdf document

Question

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.

Leon D · 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

Mohamed Abedallah · Answer

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

Amit Gupta · Answer

Try https://www.google.com/search?q=read+pdf+using+itextsharp+c%23

Archit Shrivastava · Answer

can u please share any link or refrences...

Amit Gupta · Answer

Use itextsharp for that.