安装 Tesseract（带图片的逐步教程）

Installer Language

Once the unpacking of the setup is completed, the installer's language data dialog will appear. You can install Tesseract to use multiple languages by selecting additional language packs, but here we'll just install the language data for the English language.

Tesseract Installer

Click OK, and the Installer language for Tesseract OCR is set.

Tesseract OCR Setup

Next, the setup wizard will appear. This Setup Wizard will guide the Tesseract installation for Windows.

Tesseract OCR Setup Wizard

Click Next to continue the installation.

Accept License Agreement

Tesseract OCR is licensed under the Apache License Version 2.0. As it is open source and free to use, you can redistribute and modify versions of Tesseract without any royalty concerns.

Tesseract OCR is licensed under Apache License v2.0. Please accept this license to continue with the installation.

Click I Agree to proceed to installation.

Choose Users

You can choose to install Tesseract for multiple users or for a single user.

Choose to install Tesseract OCR for the Current User (you) or for all user accounts

Click Next to choose the components to install with Tesseract.

Choose Components

From the components list to install, ScrollView, Training Tools, Shortcuts creation, and Language data are all selected by default. We will keep all of the default selected options. You can choose any or skip any component based on the needs. Usually, all are necessary to install.

Here, you can choose to include or exclude Tesseract OCR components. For the best results, continue the installation with the default components selected.

Click Next to choose the installation location.

Choose Installation Location

Next, we'll choose the location to install Tesseract. Make sure you copy the destination folder path. We will need this later to add the installation location to the machine's path Environment Variable.

Select an install location for the Tesseract OCR library, and remember this location for later.

Click Next to further setup the installation of Tesseract.

Choose the Start Menu Folder

This is the last step in which we will create shortcuts in the Start menu. You can name the folder anything, but I've kept it the same as the default.

Choose the name of Tesseract OCR's Start Menu Folder

Now, click Install and wait for the installation to complete. Once the installation is done, the following screen will appear. Click Finish, and we are done with installing Tesseract OCR in Windows successfully.

Tesseract OCR Installation is now complete.

System Properties

Once the System Properties dialog box opens, click on the Advanced tab, and then click the Environment Variables button, located towards the bottom right of the screen.

The Environment Variables dialog box will be presented to you.

Environment Variables

Under System variables, click on the Path variable.

Access the Windows' System Environment Variables

Now, click Edit.

Add Tesseract OCR for Windows Installation Directory to Environment Variables

From the Edit environment variable dialog box, click New. Paste the installation location path which was copied during the second step, and click OK.

Edit Windows' Path System Environment Variable by adding an entry that includes the Absolute path to the Tesseract OCR installation

That's it! We have successfully downloaded, installed, and set the environment variable for Tesseract OCR in Windows machine.

Install with NuGet Package Manager

Installing IronOCR in Visual Studio or using the Command line with the NuGet Package Manager is straightforward. In Visual Studio, navigate to the Menu options with:

Tools > NuGet Package Manager > Package Manager Console

Then in Command line, type the following command:

Install-Package IronOcr

This will install IronOCR with ease, and now you can use it to extract its full potential.

You can also download other IronOCR NuGet Packages for different platforms:

• Windows: https://www.nuget.org/packages/IronOcr
• Linux: https://www.nuget.org/packages/IronOcr.Linux
• MacOS: https://www.nuget.org/packages/IronOcr.MacOs
• MacOS ARM: https://www.nuget.org/packages/IronOcr.MacOs.ARM

IronOCR with Tesseract 5

The below sample code shows how easy it is to use IronOCR Tesseract to read text from an image and perform OCR using C#.

// Import the IronOCR library
using IronOcr;

// Create an instance of IronTesseract
var Ocr = new IronTesseract();

string Text = Ocr.Read(@"test-files/redacted-employmentapp.png").Text;

// Output the extracted text to the console
Console.WriteLine(Text); // Printed text

// Import the IronOCR library
using IronOcr;

// Create an instance of IronTesseract
var Ocr = new IronTesseract();

string Text = Ocr.Read(@"test-files/redacted-employmentapp.png").Text;

// Output the extracted text to the console
Console.WriteLine(Text); // Printed text

' Import the IronOCR library
Imports IronOcr

' Create an instance of IronTesseract
Private Ocr = New IronTesseract()

Private Text As String = Ocr.Read("test-files/redacted-employmentapp.png").Text

' Output the extracted text to the console
Console.WriteLine(Text) ' Printed text

$vbLabelText   $csharpLabel

If you want more robust code, then the following should help you in achieving the same task:

// Import the IronOCR library
using IronOcr;

// Create an instance of IronTesseract
var Ocr = new IronTesseract();

// Using the OcrInput class to handle multiple images
using (var Input = new OcrInput()){
    // Add an image to the input collection
    Input.AddImage("test-files/redacted-employmentapp.png");
    // You can add any number of images

    // Read the OCR text from the input
    var Result = Ocr.Read(Input);

    // Output the extracted text to the console
    Console.WriteLine(Result.Text);
}

// Import the IronOCR library
using IronOcr;

// Create an instance of IronTesseract
var Ocr = new IronTesseract();

// Using the OcrInput class to handle multiple images
using (var Input = new OcrInput()){
    // Add an image to the input collection
    Input.AddImage("test-files/redacted-employmentapp.png");
    // You can add any number of images

    // Read the OCR text from the input
    var Result = Ocr.Read(Input);

    // Output the extracted text to the console
    Console.WriteLine(Result.Text);
}

' Import the IronOCR library
Imports IronOcr

' Create an instance of IronTesseract
Private Ocr = New IronTesseract()

' Using the OcrInput class to handle multiple images
Using Input = New OcrInput()
	' Add an image to the input collection
	Input.AddImage("test-files/redacted-employmentapp.png")
	' You can add any number of images

	' Read the OCR text from the input
	Dim Result = Ocr.Read(Input)

	' Output the extracted text to the console
	Console.WriteLine(Result.Text)
End Using

$vbLabelText   $csharpLabel

Input Image

Sample input image for IronOCR processing

Output Image

The output is printed on the Console as:

The console returned from the execution of IronOCR on the sample image.