IronOCR 和 Abbyy Finereader 之间的比较

1.1 ABBYY FineReader PDF — Introduction and Features

ABBYY FineReader PDF is an optical character recognition (OCR) application created by ABBYY. It allows us to convert image documents (pictures, scans, PDF files), and screen captures can be converted to editable file formats such as Microsoft Word, Microsoft Excel, Microsoft PowerPoint, Rich Text Format, HTML, PDF/A, searchable PDF, CSV, and text (plain text).

ABBYY FineReader is a desktop application available for both Windows, Linux, and macOS. It also allows the creation of editable formats for pdf files. We can also read PDFs just like we can with Adobe Acrobat. ABBYY FineReader integrates scanned documents into digital workflows.

Manage and complete documents in a simple and efficient manner to save time and effort. Work with any document in the same methodical way, whether it was created digitally or converted from paper. You can alter the text, tables, and full layout of your PDF without having to convert it first.

ABBYY FineReader PDF can create PDFs from more than 25 different file formats, straight from paper documents or by printing to a PDF printer from practically any application. PDF/A-1 to PDF/A-3 are supported for long-term archiving, and PDF/UA ensures that content is accessible when using assistive software such as screen readers. It also empowers professionals to maximize efficiency in the digital workplace.

Create and update your own interactive PDF forms using ABBYY FineReader to successfully collect information and standardize documents. Create forms by combining interactive fields of various types, setting actions, editing existing PDF forms, or adding form elements to a conventional PDF.

ABBYY FineReader can instantly convert paper documents, scans, and scanned PDFs into searchable PDFs, allowing you to retrieve documents from digital archives and access the information they contain. FineReader PDF supports all compliance levels and variants of the PDF/A format, the industry standard for long-term archiving, from PDF/A-1 through PDF/A-3.

ABBYY’s latest AI-based OCR technology, FineReader PDF, makes it easier to digitize, retrieve, edit, protect, share, and collaborate on all kinds of documents in the same workflow. FineReader also includes document comparison, which helps us to compare original documents, as well as converted PDFs and image files.

1.2 IronOCR — Introduction and Features

IronOCR provides software for engineers who use IronOCR for .NET to read text content from photos and PDFs in .NET apps and Web sites. It scans photos for text and barcodes, and supports numerous worldwide languages; it can then provide output as either plain text or structured data. The OCR library from Iron Software can be used in MVC, Web, console, and desktop .NET applications. For commercial deployments, licensing is provided with direct assistance from the development team.

• Using the latest Tesseract 5 engine, IronOCR reads text, barcodes, and QR codes from any picture or PDF format. This library quickly adds OCR to desktop, console, and web applications.
• IronOCR supports 125 international languages. It also supports custom language and word lists.
• IronOCR is able to read more than 20 barcode formats and QR codes.
• IronOCR supports multipage gifs and tiff image formats.
• IronOCR provides correction for low-quality scanned images.
• IronOCR supports multithreading — it executes one or more processes at a time.
• IronOCR can provide structured data output for pages, paragraphs, lines, words, characters, etc.
• IronOCR supports a variety of operating systems such as Windows, Linux, macOS, etc.

3.1 Install ABBYY FineReader PDF

We can download the ABBYY FineReader here.

The above image shows that there are two versions, Individual and Business, that you can download as per your requirements. Select the "download free trial" option. It will redirect you to a form as in the image below:

We will need to fill out the form to get the EXE file location. Click the download option to download the file.

Once the file download is completed, we can double-click the EXE file to start the installation. Once completed, it will display a popup message, and it is now ready to use.

3.2 Install IronOCR

IronOCR Library can be downloaded and installed in four ways.

These are:

• Using Visual Studio
• Using the Visual Studio Command-Line
• Direct download from the NuGet website
• Direct download from the IronPDF website

3.2.1 Using Visual Studio

The Visual Studio software provides the NuGet Package Manager option to install the package directly to the solution. The below screenshot shows how to open the NuGet Package Manager.

It provides a search box to show the list of packages from the NuGet website. In the package manager, we need to search for the keyword IronOCR, as in the screenshot below:

From the above image, we will get the list of related search items. We need to select the required option to install the package to the solution.

3.2.2 Using the Visual Studio Command-Line

In Visual Studio, go to Tools -> NuGet Package Manager -> Package Manager Console

Enter the following line in the Package Manager Console tab:

Install-Package IronOcr

This command will download and install the package in the current project, and it will be ready to use.

3.2.3 Direct download from the NuGet website

The third way is to download the NuGet package directly from the website.

• Navigate to the Link.
• Select the download package option from the menu on the right-hand side.
• Double-click the downloaded package. It will be installed automatically.
• Next, reload the solution and start using it in the project.

3.2.4 Direct download from the IronOCR website

Click the link here to download the latest package direct from the website. Once downloaded, follow the steps below to add the package to the project.

• Right-click the project from the solution window.
• Then, select the "Add Reference" option and browse the location of the downloaded reference.
• Next, click OK to add the reference.

4.1 Using ABBYY FineReader PDF

Next, open the ABBYY FineReader PDF app which will open with multiple options, as in the image below.

Next, select the option "Open" from the OCR Editor options. This will prompt an option to select image files:

After selecting a file, it will automatically start scanning the image into editable text, and then show the result in the window as in the screenshot below:

The above image shows the source image converted into editable text. However, the result is not too accurate. Some of the numbers are not recognized by the ABBYY FineReader PDF app. This is clearly shown in the comparison windows — on the left side is the source image, and on the right side is the OCR converted text.

4.2 Using IronOCR

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

// Configure OCR language and Tesseract version
Ocr.Language = OcrLanguage.EnglishBest;
Ocr.Configuration.TesseractVersion = TesseractVersion.Tesseract5;

// Create a new OcrInput object to manage input images
using (var Input = new OcrInput())
{
    // Add an image to the input for processing
    Input.AddImage(@"3.png");

    // Perform OCR to read text from the image
    var Result = Ocr.Read(Input);

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

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

// Configure OCR language and Tesseract version
Ocr.Language = OcrLanguage.EnglishBest;
Ocr.Configuration.TesseractVersion = TesseractVersion.Tesseract5;

// Create a new OcrInput object to manage input images
using (var Input = new OcrInput())
{
    // Add an image to the input for processing
    Input.AddImage(@"3.png");

    // Perform OCR to read text from the image
    var Result = Ocr.Read(Input);

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

' Create an instance of IronTesseract for OCR operations
Dim Ocr = New IronTesseract()

' Configure OCR language and Tesseract version
Ocr.Language = OcrLanguage.EnglishBest
Ocr.Configuration.TesseractVersion = TesseractVersion.Tesseract5

' Create a new OcrInput object to manage input images
Using Input = New OcrInput()
	' Add an image to the input for processing
	Input.AddImage("3.png")

	' Perform OCR to read text from the image
	Dim Result = Ocr.Read(Input)

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

The Tesseract 5 API, which allows us to convert image files into text, is demonstrated above. We're creating an instance of IronTesseract in the above code snippet. We're also using an OcrInput object that will allow us to add one or more image files. We must provide the path of the available image inside the code when utilizing the OcrInput object method AddImage. Any number of images can be added. The function Read in the IronTesseract object that we constructed earlier may be utilized to perform OCR by parsing the image file and extracting the result into the OCR result. It is capable of extracting text from images and converting it to a string.

We can also use Tesseract to add multi-frame images. AddMultiFrameTiff is a different method for this operation. The Tesseract library reads each frame in the image, and each frame is treated as a distinct page. The process will read the first frame of the image and then proceed onto the next frame, and so on, until all of the image's frames have been scanned. Only the tiff image format is supported by this method.

The above image is the output of the IronOCR result, which is accurate and shows the data correctly converted into editable text.

5.1 Using ABBYY FineReader PDF

Open the ABBYY FineReader PDF software. This will open a page like the image below, offering multiple options.

Next, select the option "Open" from the OCR Editor options. This will prompt an option to select the image/PDF. We can select either a PDF or an image, or we can select both files.

After selecting the file, click the OK button. It will automatically start scanning the image into editable text and show the result in a window like the screenshot below.

The above image shows the source PDF converted into editable text. However, the result is not completely accurate. Some of the numbers are not recognized by the ABBYY FineReader PDF application. This is clearly shown in the comparison windows — on the left side is the source PDF, and on the right side is the OCR converted text.

5.2 Using IronOCR

We can also use OCRInput to manage PDF files. Every page of the documents will be read by the Iron Tesseract class. The text will then be extracted from the pages. We may also open protected documents using a second function called AddPdf, which allows us to add PDFs to our document list (password if it is protected). The following code demonstrates how to open a password-protected PDF document:

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

// Create OcrInput to manage input PDFs
using (var Input = new OcrInput())
{
    // Add a password-protected PDF to the input
    Input.AddPdf("example.pdf", "password");

    // Perform OCR to read text from the PDF
    var Result = Ocr.Read(Input);

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

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

// Create OcrInput to manage input PDFs
using (var Input = new OcrInput())
{
    // Add a password-protected PDF to the input
    Input.AddPdf("example.pdf", "password");

    // Perform OCR to read text from the PDF
    var Result = Ocr.Read(Input);

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

' Create an instance of IronTesseract for OCR operations
Dim Ocr = New IronTesseract()

' Create OcrInput to manage input PDFs
Using Input = New OcrInput()
	' Add a password-protected PDF to the input
	Input.AddPdf("example.pdf", "password")

	' Perform OCR to read text from the PDF
	Dim Result = Ocr.Read(Input)

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

The following methods are also provided by Iron Tesseract:

• AddPdfPage
• AddPdfPages

We may read and extract content from a single page in a PDF document using AddPdfPage. Only the page number from which we wish to extract text needs to be specified. AddPdfPages allows us to extract text from multiple pages that we specify. In IEnumerable<int>, we simply need to specify the number of pages. We must also include the file location as well as the extension of the file. This is demonstrated in the following code example:

// Define numbers representing pages to extract from the PDF
IEnumerable<int> numbers = new List<int> { 2, 8, 10 };

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

// Create OcrInput to manage input PDFs
using (var Input = new OcrInput())
{
    // Add a specific page from PDF for OCR
    // Input.AddPdfPage("example.pdf", 10);

    // Add multiple specific pages from PDF for OCR
    // Input.AddPdfPages("example.pdf", numbers);

    // Perform OCR to read text from the specified pages
    var Result = Ocr.Read(Input);

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

    // Save the extracted text to a file
    Result.SaveAsTextFile("ocrtext.txt");
}

// Define numbers representing pages to extract from the PDF
IEnumerable<int> numbers = new List<int> { 2, 8, 10 };

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

// Create OcrInput to manage input PDFs
using (var Input = new OcrInput())
{
    // Add a specific page from PDF for OCR
    // Input.AddPdfPage("example.pdf", 10);

    // Add multiple specific pages from PDF for OCR
    // Input.AddPdfPages("example.pdf", numbers);

    // Perform OCR to read text from the specified pages
    var Result = Ocr.Read(Input);

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

    // Save the extracted text to a file
    Result.SaveAsTextFile("ocrtext.txt");
}

' Define numbers representing pages to extract from the PDF
Dim numbers As IEnumerable(Of Integer) = New List(Of Integer) From {2, 8, 10}

' Create an instance of IronTesseract for OCR operations
Dim Ocr = New IronTesseract()

' Create OcrInput to manage input PDFs
Using Input = New OcrInput()
	' Add a specific page from PDF for OCR
	' Input.AddPdfPage("example.pdf", 10);

	' Add multiple specific pages from PDF for OCR
	' Input.AddPdfPages("example.pdf", numbers);

	' Perform OCR to read text from the specified pages
	Dim Result = Ocr.Read(Input)

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

	' Save the extracted text to a file
	Result.SaveAsTextFile("ocrtext.txt")
End Using

Using the SaveAsTextFile function, we can store the result as a text file, allowing us to download the file to the output directory path. Also, we can save the file as an HTML file using SaveAsHocrFile.

6.1 Using ABBYY FineReader PDF

FineReader has some additional options such as: Draw Text Area, Draw Picture Area, Draw Table Area, Draw Recognize Area, etc. These help the user to improve the performance of the OCR. Further, in addition to performing OCR, the application also enables users to complete operations such as combining PDFs, splitting PDFs, editing PDFs, etc.

6.2 Using IronOCR

IronOCR has unique features which allow us to read barcodes and QR codes from scanned documents. The below code shows how we can read barcodes from a given image or document.

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

// Configure OCR language and barcode reading
Ocr.Language = OcrLanguage.EnglishBest;
Ocr.Configuration.ReadBarCodes = true;
Ocr.Configuration.TesseractVersion = TesseractVersion.Tesseract5;

// Create OcrInput to manage input images
using (var Input = new OcrInput())
{
    // Add an image containing barcodes
    Input.AddImage("barcode.gif");

    // Perform OCR to read text and barcodes from the image
    var Result = Ocr.Read(Input);

    // Iterate through detected barcodes and output their values
    foreach (var Barcode in Result.Barcodes)
    {
        Console.WriteLine(Barcode.Value);
    }
}

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

// Configure OCR language and barcode reading
Ocr.Language = OcrLanguage.EnglishBest;
Ocr.Configuration.ReadBarCodes = true;
Ocr.Configuration.TesseractVersion = TesseractVersion.Tesseract5;

// Create OcrInput to manage input images
using (var Input = new OcrInput())
{
    // Add an image containing barcodes
    Input.AddImage("barcode.gif");

    // Perform OCR to read text and barcodes from the image
    var Result = Ocr.Read(Input);

    // Iterate through detected barcodes and output their values
    foreach (var Barcode in Result.Barcodes)
    {
        Console.WriteLine(Barcode.Value);
    }
}

' Create an instance of IronTesseract for OCR operations
Dim Ocr = New IronTesseract()

' Configure OCR language and barcode reading
Ocr.Language = OcrLanguage.EnglishBest
Ocr.Configuration.ReadBarCodes = True
Ocr.Configuration.TesseractVersion = TesseractVersion.Tesseract5

' Create OcrInput to manage input images
Using Input = New OcrInput()
	' Add an image containing barcodes
	Input.AddImage("barcode.gif")

	' Perform OCR to read text and barcodes from the image
	Dim Result = Ocr.Read(Input)

	' Iterate through detected barcodes and output their values
	For Each Barcode In Result.Barcodes
		Console.WriteLine(Barcode.Value)
	Next Barcode
End Using

The code above helps read barcodes from a given image or PDF document. It is able to read more than one barcode from a page/image. To read the barcode, IronOCR has a unique setting Ocr.Configuration.ReadBarCodes which helps read the barcode; the default value is set to false.

After reading the input, the data will be saved into the object called OCRResult; this has a property called Barcodes that assembles all the available barcode data into a list. By using the foreach loop, we can get all the barcodes' details one-by-one. Also, it will scan the barcode and read the value of the barcode — two operations completed in one process!

Furthermore, threading options are supported too, meaning we can perform multiple OCR processes at the same time. IronOCR is also able to recognize a specific area from a specified region.

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

// Create OcrInput to manage input images
using (var Input = new OcrInput())
{
    // Define a specific rectangular area on the image for OCR
    var ContentArea = new System.Drawing.Rectangle() { X = 215, Y = 1250, Height = 280, Width = 1335 };

    // Add an image specifying the area to be processed
    Input.Add("document.png", ContentArea);

    // Perform OCR to read text from the specified area
    var Result = Ocr.Read(Input);

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

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

// Create OcrInput to manage input images
using (var Input = new OcrInput())
{
    // Define a specific rectangular area on the image for OCR
    var ContentArea = new System.Drawing.Rectangle() { X = 215, Y = 1250, Height = 280, Width = 1335 };

    // Add an image specifying the area to be processed
    Input.Add("document.png", ContentArea);

    // Perform OCR to read text from the specified area
    var Result = Ocr.Read(Input);

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

' Create an instance of IronTesseract for OCR operations
Dim Ocr = New IronTesseract()

' Create OcrInput to manage input images
Using Input = New OcrInput()
	' Define a specific rectangular area on the image for OCR
	Dim ContentArea = New System.Drawing.Rectangle() With {
		.X = 215,
		.Y = 1250,
		.Height = 280,
		.Width = 1335
	}

	' Add an image specifying the area to be processed
	Input.Add("document.png", ContentArea)

	' Perform OCR to read text from the specified area
	Dim Result = Ocr.Read(Input)

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

The above is a sample code for performing OCR on a specific region. We only need to specify the rectangular region on the image or PDF — the Tesseract engine in IronOCR enables the recognition of the text.