Handling OCR

Introduction

In this tutorial, we will explore how to use GroupDocs.Parser for .NET to handle Optical Character Recognition (OCR) tasks efficiently. This library provides powerful tools to extract text from documents, and with OCR, you can extract text even from images or scanned documents. Let’s dive into the process step by step.

Prerequisites

Before we begin, make sure you have the following set up:

  • GroupDocs.Parser for .NET Library: Download the library from here.
  • Your Sample File: Prepare a sample file (document or image) from which you want to extract text.
  • Basic knowledge of C# and .NET environment.

Import Namespaces

First, you need to import the necessary namespaces to use GroupDocs.Parser functionalities in your .NET application.

using System;
using System.Collections.Generic;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using Aspose.OCR;
using GroupDocs.Parser.Data;
using GroupDocs.Parser.Options;

Step 1: Create Parser Settings with OCR Connector

Initialize the ParserSettings class with the OCR connector. For instance, using Aspose OCR on-premise.

ParserSettings settings = new ParserSettings(new AsposeOcrOnPremise());

Step 2: Configure OCR Options

Set up an OcrEventHandler to handle warnings during OCR processing.

OcrEventHandler handler = new OcrEventHandler();
OcrOptions ocrOptions = new OcrOptions(handler);

Step 3: Configure Text Extraction Options

Create TextOptions to enable OCR-based text extraction.

TextOptions options = new TextOptions(false, true, ocrOptions);

Step 4: Extract Text using OCR

Instantiate the Parser class with the settings and extract text using OCR.

using (Parser parser = new Parser("YourSampleFile.pdf", settings))
{
    using (TextReader reader = parser.GetText(options))
    {
        if (reader == null)
        {
            Console.WriteLine("Text extraction isn't supported.");
        }
        else
        {
            Console.WriteLine(reader.ReadToEnd());
        }
    }
    if (handler.HasWarnings)
    {
        Console.WriteLine("The following warnings occurred during text recognition:");
        foreach (string w in handler.Warnings)
        {
            Console.WriteLine("\t* " + w);
        }
    }
    else
    {
        Console.WriteLine("Text recognition was performed without any warnings.");
    }
}

Conclusion

By following these steps, you can leverage GroupDocs.Parser for .NET to handle OCR tasks effectively within your applications. Extracting text from images or scanned documents becomes seamless with the powerful capabilities offered by this library.

FAQ’s

Is GroupDocs.Parser for .NET compatible with different file formats?

Yes, GroupDocs.Parser supports a wide range of file formats including PDF, DOCX, PPTX, XLSX, images (JPEG, PNG, TIFF), and more.

Can I use GroupDocs.Parser for .NET in my commercial projects?

Yes, you can integrate GroupDocs.Parser for .NET into your commercial applications after purchasing a license.

Does GroupDocs.Parser handle encrypted or password-protected files?

GroupDocs.Parser can parse and extract text from password-protected PDF documents.

Is there a trial version available for GroupDocs.Parser for .NET?

Yes, you can download a free trial version from here.

You can visit the GroupDocs.Parser forum for any support queries or discussions.

Recognizing Text