Iris & IronOCR 之间的 OCR 软件比较

There are multiple ways to install the IronOCR library.

1. Using Visual Studio NuGet Package Manager

NuGet is the package manager for downloading and installing dependencies in your project. Its packages contain compiled code (DLL) and the manifest file. Access it using the following method:

• Click on the Tools tab.
• Extend the NuGet Package Manager option.

• Click Manage NuGet Packages for Solutions.

  

• or, right-click Solution Explorer.

• Click Manage NuGet Packages.

  

Now, the NuGet Package Manager window will open. Browse for IronOCR and click Install.

2. Download From NuGet Website

It can be downloaded directly from the NuGet official website.

1. Visit the NuGet website.
2. Click the download package option on the right-hand side of the page.
3. Open the downloaded package and it will start installing.
4. Finally, reload the solution, and it's done.

3. Download Using the IronOCR Web Page

Simply visit the Iron Software website and navigate to the IronOCR for the .NET webpage. Scroll to the bottom and click Download DLL or Download Windows installer.

A zip file is downloaded. Extract your project file or run the Windows installer. Follow the steps below to add it to your project.

1. Right-click the dependencies of the project in Visual Studio from the solution explorer.
2. Then, select the option Add Project Reference.
3. Browse the downloaded DLL file location.
4. Finally, click on OK to add a project reference.

4. Using Command Prompt in Visual Studio

1. Navigate to the Tools tab in Visual Studio.
2. Extend the NuGet Package Manager option.

3. Select Package Manager Console and type the following command:

   Install-Package IronOcr

This will automatically download and install IronOCR in your project.

5. Adding Necessary IronOCR Namespaces

There is only one namespace required, which needs to be added on top of the source code file where we need to access its functions.

using IronOcr;

using IronOcr;

Imports IronOcr

Now, we are ready to use IronOCR in our project.

Reading data from images is quite a tedious task. Images resolution and quality play an important role while extracting content. Both libraries provide optical character recognition functionality to extract text from images.

1.1. Using IronOCR

IronOCR makes it very easy for developers to read the contents of an image file with its powerful IronTessaract class. Here we will use a PNG image to read text from an image file and the code is as follows:

var OCR = new IronTesseract();
// We use a using statement to ensure resources are freed after use
using (var Input = new OcrInput())
{
    // Add the image from which you want to extract text
    Input.AddImage("test-files/employmentapp.png");
    // Perform OCR to read the text
    var Result = OCR.Read(Input);
    // Output the extracted text to the console
    Console.WriteLine(Result.Text);
}

var OCR = new IronTesseract();
// We use a using statement to ensure resources are freed after use
using (var Input = new OcrInput())
{
    // Add the image from which you want to extract text
    Input.AddImage("test-files/employmentapp.png");
    // Perform OCR to read the text
    var Result = OCR.Read(Input);
    // Output the extracted text to the console
    Console.WriteLine(Result.Text);
}

Dim OCR = New IronTesseract()
' We use a using statement to ensure resources are freed after use
Using Input = New OcrInput()
	' Add the image from which you want to extract text
	Input.AddImage("test-files/employmentapp.png")
	' Perform OCR to read the text
	Dim Result = OCR.Read(Input)
	' Output the extracted text to the console
	Console.WriteLine(Result.Text)
End Using

INPUT IMAGE

OUTPUT

The output of IronOCR matches the original image given to it. The code is clean and easy to understand without any technicalities.

1.2. Using Iris OCR

Iris OCR software allows all your paper documents to be scanned and used for text recognition. Text extraction is very simple using Iris OCR technology. Select an image file from the "From File" in the Home menu tab. The same image is used to test and compare the outputs of the two software.

You can apply image correction to the uploaded image. In the output file tab, you can choose any format as your output. It provides multiple output formats like Word, Excel, PDF, text files, etc. Simply save the file in any format and open it for viewing the extracted text.

OUTPUT

You can see that there is a clear difference in the output of the two software. IronOCR extracted the exact text from the image along with the formatting. Whereas, Iris OCR preserved the formatting but the full name and phone number are messed up.

2.1. Using IronOCR

IronOCR provides a unique and useful feature while reading images i.e. it can read barcodes and QR codes. It can detect barcodes and display their value with ease.

To do so, set the read barcode configuration to true and then iterate through each of the barcodes in the OCR results. The code for reading barcodes is given below:

var OCR = new IronTesseract();
OCR.Configuration.ReadBarCodes = true;
// Using statement to automatically dispose of resources
using (var input = new OcrInput())
{
    // Add the image to be processed
    input.AddImage("test-files/Barcode.png");
    // Read the OCR result
    var Result = OCR.Read(input);
    // Iterate through the barcodes detected and display their values
    foreach (var Barcode in Result.Barcodes)
    {
        Console.WriteLine(Barcode.Value);
    }
}

var OCR = new IronTesseract();
OCR.Configuration.ReadBarCodes = true;
// Using statement to automatically dispose of resources
using (var input = new OcrInput())
{
    // Add the image to be processed
    input.AddImage("test-files/Barcode.png");
    // Read the OCR result
    var Result = OCR.Read(input);
    // Iterate through the barcodes detected and display their values
    foreach (var Barcode in Result.Barcodes)
    {
        Console.WriteLine(Barcode.Value);
    }
}

Dim OCR = New IronTesseract()
OCR.Configuration.ReadBarCodes = True
' Using statement to automatically dispose of resources
Using input = New OcrInput()
	' Add the image to be processed
	input.AddImage("test-files/Barcode.png")
	' Read the OCR result
	Dim Result = OCR.Read(input)
	' Iterate through the barcodes detected and display their values
	For Each Barcode In Result.Barcodes
		Console.WriteLine(Barcode.Value)
	Next Barcode
End Using

INPUT IMAGE

OUTPUT

All three barcodes in the input image are read successfully, and their hidden text is displayed.

2.2. Using Iris OCR

Iris OCR also provides the facility to extract the barcode data from images or PDF files. However, for barcodes, we have to manually select the barcode area to be detected. Move to the zones tab and select the barcode to get recognized.

Right-click the selected region and copy it as data, then save it in a word processing file to view the data.

In this case, Iris OCR software is not able to detect the hidden text behind the barcodes given in the picture.

3.1. Using IronOCR

Reading PDF files is as easy as reading images in IronOCR. You only need to change the AddImage method to AddPdf in the image reading code. The code goes as follows:

var OCR = new IronTesseract();
// Using statement for resource management
using (var Input = new OcrInput())
{
    // Add the PDF file to be processed
    Input.AddPdf("test-files/example.pdf");
    // Get the OCR results
    var Result = OCR.Read(Input);
    // Output the extracted text
    Console.WriteLine(Result.Text);
}

var OCR = new IronTesseract();
// Using statement for resource management
using (var Input = new OcrInput())
{
    // Add the PDF file to be processed
    Input.AddPdf("test-files/example.pdf");
    // Get the OCR results
    var Result = OCR.Read(Input);
    // Output the extracted text
    Console.WriteLine(Result.Text);
}

Dim OCR = New IronTesseract()
' Using statement for resource management
Using Input = New OcrInput()
	' Add the PDF file to be processed
	Input.AddPdf("test-files/example.pdf")
	' Get the OCR results
	Dim Result = OCR.Read(Input)
	' Output the extracted text
	Console.WriteLine(Result.Text)
End Using

OUTPUT

The extracted text is in the same formatting as the PDF file.

3.2. Using Iris OCR

Reading PDF files is also very easy using Iris software. It supports all digital formats and PDF is one of them. You can also make searchable formats using Iris OCR software. PDF is a paper document and every page is treated as a separate image file. Open paper documents using From File option. Select the page range you want to extract text from and save it in any editable format of your choice from the given options.

OUTPUT