How to search text in pdf file in ASP.NET MVC by using OCR?

Anusha Bommidela

I need one example how to search text in pdf file in asp.net mvc by using OCR

3 Replies

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Rajanikant Hawaldar6y ago
The solution depends on the PDF file you use: 1. If the PDF pages are images (without text), you can recognize the text in these images using an OCR engine. 2. If the PDF pages are searchable (Text based), you can parse the objects in the PDF pages and then get the text objects. Since PDF files are not directly supported in .NET Frameworks, you can use LEADTOOLS SDK to get the text from PDF. See this link: http://demo.leadtools.com/JavaScript/OCR/
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Kip Hackman6y ago
You can use LEADTOOLS Document SDK technology in your application.
https://www.leadtools.com/sdk/document
Here is some sample code:
List documentText = new List();
var options = new LoadDocumentOptions();
using (LEADDocument document = DocumentFactory.LoadFromFile(@"SEARCHABLE PDF FILE PATH", options))
{
    document.Text.TextExtractionMode = DocumentTextExtractionMode.Auto;
    document.Text.OcrEngine = ocrEngine;
    foreach (DocumentPage page in document.Pages)
    {
        DocumentPageText pageText = page.GetText();
        //Build the words if you want the word information (bounds and each word value)
        //pageText.BuildWords();
        pageText.BuildText();
        documentText.Add(pageText);
    }
}
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Rajeesh Menoth6y ago
Hi,

Please check the following reference and hopefully you will get some idea obout the ocr in ASP.NET.

Reference :

https://www.c-sharpcorner.com/article/cognitive-services-optical-character-recognition-ocr-from-an-image-using-com/
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