How to use Tesseract OCR in C# Alternatives with IronOCR

using IronOcr;
using System;

// Initialize IronTesseract for performing OCR (Optical Character Recognition)
var ocr = new IronTesseract
{
    // Set the language for the OCR process to English
    Language = OcrLanguage.English
};

// Create a new OCR input that can hold the images to be processed
using var input = new OcrInput();

// Specify the page indices to be processed from the TIFF image
var pageIndices = new int[] { 1, 2 };

// Load specific pages of the TIFF image into the OCR input object; this is useful for multi-page image files
input.LoadImageFrames(@"img\example.tiff", pageIndices);

// Optional pre-processing steps (uncomment as needed)
// input.DeNoise();  // Use this to remove noise from the image if necessary
// input.Deskew();   // Use this to straighten images that are slightly tilted

// Perform OCR on the provided input
OcrResult result = ocr.Read(input);

// Output the recognized text to the console
Console.WriteLine(result.Text);

// Note: The OcrResult object contains additional information about the OCR process
// and can be explored further using IntelliSense features in your IDE.

Imports IronOcr

Imports System



' Initialize IronTesseract for performing OCR (Optical Character Recognition)

Private ocr = New IronTesseract With {.Language = OcrLanguage.English}



' Create a new OCR input that can hold the images to be processed

Private input = New OcrInput()



' Specify the page indices to be processed from the TIFF image

Private pageIndices = New Integer() { 1, 2 }



' Load specific pages of the TIFF image into the OCR input object; this is useful for multi-page image files

input.LoadImageFrames("img\example.tiff", pageIndices)



' Optional pre-processing steps (uncomment as needed)

' input.DeNoise();  // Use this to remove noise from the image if necessary

' input.Deskew();   // Use this to straighten images that are slightly tilted



' Perform OCR on the provided input

Dim result As OcrResult = ocr.Read(input)



' Output the recognized text to the console

Console.WriteLine(result.Text)



' Note: The OcrResult object contains additional information about the OCR process

' and can be explored further using IntelliSense features in your IDE.

// Import the IronOcr and System namespaces. IronOcr is a library for Optical Character Recognition.
using IronOcr;
using System;

// Create an instance of the IronTesseract class from the IronOcr library.
// This class provides methods to perform OCR on image inputs.
var ocr = new IronTesseract();

// Create an OcrInput object to load and manipulate images for OCR processing.
// The 'using' construct ensures that resources are automatically cleaned up after use.
using var input = new OcrInput();

// Specify the indices of the pages to be loaded from the multi-page TIFF image. 
// Note: Page indices for image processing libraries typically start from 1.
var pageIndices = new int[] { 1, 2 };

// Load the specified image frames from the TIFF file located at the given relative path.
// Relative paths are resolved against the working directory of the application.
input.LoadImageFrames(@"img\example.tiff", pageIndices);

// Apply a de-noising filter to the images to reduce digital noise.
// This enhances the accuracy of subsequent OCR processing.
input.DeNoise();

// Apply a deskewing filter to correct any rotation or perspective distortion 
// in the images. This helps in improving OCR precision.
input.Deskew();

// Perform the OCR operation on the prepared input and obtain the result.
// The result contains the recognized text from the processed images.
OcrResult result = ocr.Read(input);

// Output the recognized text to the console.
Console.WriteLine(result.Text);

' Import the IronOcr and System namespaces. IronOcr is a library for Optical Character Recognition.

Imports IronOcr

Imports System



' Create an instance of the IronTesseract class from the IronOcr library.

' This class provides methods to perform OCR on image inputs.

Private ocr = New IronTesseract()



' Create an OcrInput object to load and manipulate images for OCR processing.

' The 'using' construct ensures that resources are automatically cleaned up after use.

Private input = New OcrInput()



' Specify the indices of the pages to be loaded from the multi-page TIFF image. 

' Note: Page indices for image processing libraries typically start from 1.

Private pageIndices = New Integer() { 1, 2 }



' Load the specified image frames from the TIFF file located at the given relative path.

' Relative paths are resolved against the working directory of the application.

input.LoadImageFrames("img\example.tiff", pageIndices)



' Apply a de-noising filter to the images to reduce digital noise.

' This enhances the accuracy of subsequent OCR processing.

input.DeNoise()



' Apply a deskewing filter to correct any rotation or perspective distortion 

' in the images. This helps in improving OCR precision.

input.Deskew()



' Perform the OCR operation on the prepared input and obtain the result.

' The result contains the recognized text from the processed images.

Dim result As OcrResult = ocr.Read(input)



' Output the recognized text to the console.

Console.WriteLine(result.Text)

using IronOcr;
using System;

// This code demonstrates how to perform OCR using IronTesseract on various input types.
// These include password-protected PDFs, multi-frame TIFF images, and other image files.

// Create an instance of IronTesseract to handle OCR operations.
var ocr = new IronTesseract();

// Create an OcrInput object to load PDF and image files.
using var input = new OcrInput();

// Load a password-protected PDF file. 
// "example.pdf" is the file name, and "password" is the PDF password.
// If the PDF is not password-protected, omit the second argument.
input.LoadPdf("example.pdf", "password");

// Define the indices of the pages to be loaded from a multi-frame TIFF image.
// Page indices are zero-based, meaning the first page is index 0.
// In this example, pages 1 and 2 will be loaded.
var pageIndices = new int[] { 1, 2 };

// Load specific pages from a multi-frame TIFF image, specified by the pageIndices array.
input.LoadImageFrames("multi-frame.tiff", pageIndices);

// Load individual image files into the OCR input.
// The images are loaded in the order they are added. You can load as many as needed.
input.LoadImage("image1.png");
input.LoadImage("image2.jpeg");

// Perform OCR on all the loaded inputs (PDF, TIFF frames, and images).
// The result contains the recognized text from all the input sources.
var result = ocr.Read(input);

// Output the recognized text to the console.
Console.WriteLine(result.Text);

Imports IronOcr

Imports System



' This code demonstrates how to perform OCR using IronTesseract on various input types.

' These include password-protected PDFs, multi-frame TIFF images, and other image files.



' Create an instance of IronTesseract to handle OCR operations.

Private ocr = New IronTesseract()



' Create an OcrInput object to load PDF and image files.

Private input = New OcrInput()



' Load a password-protected PDF file. 

' "example.pdf" is the file name, and "password" is the PDF password.

' If the PDF is not password-protected, omit the second argument.

input.LoadPdf("example.pdf", "password")



' Define the indices of the pages to be loaded from a multi-frame TIFF image.

' Page indices are zero-based, meaning the first page is index 0.

' In this example, pages 1 and 2 will be loaded.

Dim pageIndices = New Integer() { 1, 2 }



' Load specific pages from a multi-frame TIFF image, specified by the pageIndices array.

input.LoadImageFrames("multi-frame.tiff", pageIndices)



' Load individual image files into the OCR input.

' The images are loaded in the order they are added. You can load as many as needed.

input.LoadImage("image1.png")

input.LoadImage("image2.jpeg")



' Perform OCR on all the loaded inputs (PDF, TIFF frames, and images).

' The result contains the recognized text from all the input sources.

Dim result = ocr.Read(input)



' Output the recognized text to the console.

Console.WriteLine(result.Text)

using IronOcr;
using System;

// This code configures and uses the IronTesseract OCR library to read text from specific pages of a multi-page TIFF image.

// Initialize IronTesseract for OCR
var ocr = new IronTesseract();

// Configure for speed: blacklist certain characters to improve processing speed
ocr.Configuration.BlackListCharacters = "~`$#^*_}{][
\\@¢©«»°±·×‑–—‘’“”•…′″€™←↑→↓↔⇄⇒∅∼≅≈≠≤≥≪≫⌁⌘○◔◑◕●☐☑☒☕☮☯☺♡⚓✓✰";

// Set the page segmentation mode to automatically detect elements in the image
ocr.Configuration.PageSegmentationMode = TesseractPageSegmentationMode.Auto;

// Disable reading of barcodes to speed up the OCR process
ocr.Configuration.ReadBarCodes = false;

// Use a fast variant of the English language pack for quick OCR processing
ocr.Language = OcrLanguage.EnglishFast;

// Create a new OcrInput object to hold the images to be processed
using var input = new OcrInput();

// Define the page indices to load from the multi-page TIFF image
var pageIndices = new int[] { 1, 2 }; // Assumes pages are indexed from 0

// Load specific frames (pages) from the TIFF image
input.LoadImageFrames(@"img\Potter.tiff", pageIndices);

// Perform OCR on the input images
var result = ocr.Read(input);

// Output the OCR result text to the console
Console.WriteLine(result.Text);

Imports IronOcr

Imports System



' This code configures and uses the IronTesseract OCR library to read text from specific pages of a multi-page TIFF image.



' Initialize IronTesseract for OCR

Private ocr = New IronTesseract()



' Configure for speed: blacklist certain characters to improve processing speed

ocr.Configuration.BlackListCharacters = "~`$#^*_}{][
\@¢©«»°±·×‑–—‘’“”•…′″€™←↑→↓↔⇄⇒∅∼≅≈≠≤≥≪≫⌁⌘○◔◑◕●☐☑☒☕☮☯☺♡⚓✓✰"



' Set the page segmentation mode to automatically detect elements in the image

ocr.Configuration.PageSegmentationMode = TesseractPageSegmentationMode.Auto



' Disable reading of barcodes to speed up the OCR process

ocr.Configuration.ReadBarCodes = False



' Use a fast variant of the English language pack for quick OCR processing

ocr.Language = OcrLanguage.EnglishFast



' Create a new OcrInput object to hold the images to be processed

Dim input = New OcrInput()



' Define the page indices to load from the multi-page TIFF image

Dim pageIndices = New Integer() { 1, 2 } ' Assumes pages are indexed from 0



' Load specific frames (pages) from the TIFF image

input.LoadImageFrames("img\Potter.tiff", pageIndices)



' Perform OCR on the input images

Dim result = ocr.Read(input)



' Output the OCR result text to the console

Console.WriteLine(result.Text)

// Import the IronOcr namespace to use OCR functionalities provided by the IronTesseract class.
using IronOcr;

// Create an instance of the IronTesseract class to perform OCR.
var ocr = new IronTesseract();

// Read the specified image file and extract the text using the OCR engine.
// Ensure that the image file "img.png" exists in the same directory as the executable or provide an appropriate path.
try
{
    OcrResult ocrResult = ocr.Read("img.png");

    // Extract the recognized text from the OCR result.
    string extractedText = ocrResult.Text;

    // Output the extracted text to the console for review.
    Console.WriteLine(extractedText);
}
catch (Exception ex)
{
    // If any error occurs during the OCR process, write the error message to the console.
    Console.WriteLine("An error occurred while trying to read the image: " + ex.Message);
}

' Import the IronOcr namespace to use OCR functionalities provided by the IronTesseract class.

Imports IronOcr



' Create an instance of the IronTesseract class to perform OCR.

Private ocr = New IronTesseract()



' Read the specified image file and extract the text using the OCR engine.

' Ensure that the image file "img.png" exists in the same directory as the executable or provide an appropriate path.

Try

	Dim ocrResult As OcrResult = ocr.Read("img.png")



	' Extract the recognized text from the OCR result.

	Dim extractedText As String = ocrResult.Text



	' Output the extracted text to the console for review.

	Console.WriteLine(extractedText)

Catch ex As Exception

	' If any error occurs during the OCR process, write the error message to the console.

	Console.WriteLine("An error occurred while trying to read the image: " & ex.Message)

End Try

using IronOcr;

// This code snippet demonstrates how to use IronTesseract OCR engine to process multi-frame images, 
// specifically to perform OCR on Arabic texts.

// Create an instance of the IronTesseract OCR engine.
var ocr = new IronTesseract
{
    // Set the OCR language to Arabic.
    Language = OcrLanguage.Arabic
};

// Create an OcrInput object to manage the input images for OCR.
// The using statement ensures that OcrInput is disposed of correctly, releasing any resources.
using var input = new OcrInput();

// Specify the frame indices of multi-frame images (e.g., GIF) that you want to process with OCR.
// The frame indices are 1-based, meaning that the first frame has an index of 1.
var pageIndices = new int[] { 1, 2 };

// Load the specified frames from the file into the OcrInput object for processing.
input.LoadImageFrames("img/arabic.gif", pageIndices);

// Optional: Add image filters if needed. This can help improve OCR quality, especially with low-quality images.
// IronTesseract includes advanced image filtering capabilities.

// Perform OCR on the input images and store the result.
var result = ocr.Read(input);

// If the console can't print Arabic on Windows easily, you can save the results instead.
// Save the OCR result to a text file for later review or processing.
result.SaveAsTextFile("arabic.txt");

Imports IronOcr



' This code snippet demonstrates how to use IronTesseract OCR engine to process multi-frame images, 

' specifically to perform OCR on Arabic texts.



' Create an instance of the IronTesseract OCR engine.

Private ocr = New IronTesseract With {.Language = OcrLanguage.Arabic}



' Create an OcrInput object to manage the input images for OCR.

' The using statement ensures that OcrInput is disposed of correctly, releasing any resources.

Private input = New OcrInput()



' Specify the frame indices of multi-frame images (e.g., GIF) that you want to process with OCR.

' The frame indices are 1-based, meaning that the first frame has an index of 1.

Private pageIndices = New Integer() { 1, 2 }



' Load the specified frames from the file into the OcrInput object for processing.

input.LoadImageFrames("img/arabic.gif", pageIndices)



' Optional: Add image filters if needed. This can help improve OCR quality, especially with low-quality images.

' IronTesseract includes advanced image filtering capabilities.



' Perform OCR on the input images and store the result.

Dim result = ocr.Read(input)



' If the console can't print Arabic on Windows easily, you can save the results instead.

' Save the OCR result to a text file for later review or processing.

result.SaveAsTextFile("arabic.txt")

using IronOcr;

// Ensure that the IronOCR library is installed and appropriate language packs are added through NuGet.
// For the Chinese Language Pack use the following NuGet Package Manager command:
// PM> Install-Package IronOcr.Languages.ChineseSimplified

// Instantiate the IronTesseract OCR engine
var ocr = new IronTesseract();

// Set the primary OCR language to Simplified Chinese
ocr.Language = OcrLanguage.ChineseSimplified;

// Add English as a secondary OCR language. 
// This helps the OCR engine better recognize documents containing both Chinese and English text.
ocr.AddSecondaryLanguage(OcrLanguage.English);

// Create a new OcrInput instance to hold the documents to be scanned.
// The use of a `using` statement ensures that resources are automatically released when the operation is completed.
using var input = new OcrInput();

// Load the PDF document into the OcrInput instance.
// Ensure the path is correct and that the file exists in the specified location.
input.AddPdf("multi-language.pdf");

// Run the OCR process on the loaded input. This will return an OcrResult object containing the extracted text.
var result = ocr.Read(input);

// Save the extracted text to a text file.
// The result.SaveAsTextFile method writes the OCR results to "results.txt".
result.SaveAsTextFile("results.txt");

// This methodology allows for the processing of multi-language documents using IronOCR, 
// enabling the extraction of text from PDFs in languages specified by the IronTesseract configuration.

Imports IronOcr



' Ensure that the IronOCR library is installed and appropriate language packs are added through NuGet.

' For the Chinese Language Pack use the following NuGet Package Manager command:

' PM> Install-Package IronOcr.Languages.ChineseSimplified



' Instantiate the IronTesseract OCR engine

Private ocr = New IronTesseract()



' Set the primary OCR language to Simplified Chinese

ocr.Language = OcrLanguage.ChineseSimplified



' Add English as a secondary OCR language. 

' This helps the OCR engine better recognize documents containing both Chinese and English text.

ocr.AddSecondaryLanguage(OcrLanguage.English)



' Create a new OcrInput instance to hold the documents to be scanned.

' The use of a `using` statement ensures that resources are automatically released when the operation is completed.

Dim input = New OcrInput()



' Load the PDF document into the OcrInput instance.

' Ensure the path is correct and that the file exists in the specified location.

input.AddPdf("multi-language.pdf")



' Run the OCR process on the loaded input. This will return an OcrResult object containing the extracted text.

Dim result = ocr.Read(input)



' Save the extracted text to a text file.

' The result.SaveAsTextFile method writes the OCR results to "results.txt".

result.SaveAsTextFile("results.txt")



' This methodology allows for the processing of multi-language documents using IronOCR, 

' enabling the extraction of text from PDFs in languages specified by the IronTesseract configuration.