最佳 OCR 软件比较（优缺点）

Contents

• AWS Textract
  • Pros of AWS Textract
  • Cons of AWS Textract
• Adobe Acrobat Pro DC
  • Pros of Adobe Acrobat Pro DC
  • Cons of Adobe Acrobat Pro DC
• Nanonets
  • Pros of Nanonets
  • Cons of Nanonets
• SimpleOCR
  • Pros of SimpleOCR
  • Cons of SimpleOCR
• IronOCR
  • Pros of IronOCR
  • Cons of IronOCR
  • Code Examples
• Conclusion

AWS Textract

AWS Textract is a service that converts various types of documents into an editable format using deep learning. Let's imagine you have hard copies of invoices from different companies and store all their information on spreadsheets on your device. This work is usually done manually, which is inefficient and can lead to mistakes. Textract can take invoices as input and turn them into a structured output. Once you upload your invoices to Textract, it decodes the document for you.

Adobe Acrobat Pro DC

Adobe Acrobat Pro DC is OCR software that helps you extract text and convert scanned documents into editable PDF files. In addition to its OCR tools, you can share, sign, print, or compress PDFs directly from the app. Adobe Acrobat Pro DC can also convert images to text, matching your text with the appropriate fonts on your computer. It offers a range of other functions like commenting and editing, and allows you to reorder pages, combine files, and modify images.

Nanonets

Nanonets is AI-based OCR software that converts scanned documents into editable and searchable PDFs using artificial intelligence and machine learning. It can convert PDF documents to Word file format and supports multiple languages. Nanonets uses deep learning to validate extracted data, improving as more data is processed.

SimpleOCR: Free OCR Software

SimpleOCR is a straightforward library that lets you convert scanned text images into editable text documents. Best known as a free OCR option, it supports over 100 languages and has a despeckle feature to boost accuracy.

IronOCR: .NET OCR Library

IronOCR is a .NET library designed for OCR tasks, enabling developers to easily process text data. It efficiently converts images and PDF documents into text, offers automatic character recognition, and supports 125 languages. Compatible with platforms like Windows, Mac, and Linux, it is free for personal development use.

using IronOcr;
// Instantiate the IronTesseract class
var Ocr = new IronTesseract();

using (var Input = new OcrInput(@"images\image.png"))
{
    // Deskew the image to correct any tilt
    Input.Deskew();
    // DeNoise the image if accuracy is below 97% (commented here by default)
    // Input.DeNoise();
    // Read the text from the image
    var Result = Ocr.Read(Input);
    // Output the extracted text
    Console.WriteLine(Result.Text);
}

using IronOcr;
// Instantiate the IronTesseract class
var Ocr = new IronTesseract();

using (var Input = new OcrInput(@"images\image.png"))
{
    // Deskew the image to correct any tilt
    Input.Deskew();
    // DeNoise the image if accuracy is below 97% (commented here by default)
    // Input.DeNoise();
    // Read the text from the image
    var Result = Ocr.Read(Input);
    // Output the extracted text
    Console.WriteLine(Result.Text);
}

Imports IronOcr
' Instantiate the IronTesseract class
Private Ocr = New IronTesseract()

Using Input = New OcrInput("images\image.png")
	' Deskew the image to correct any tilt
	Input.Deskew()
	' DeNoise the image if accuracy is below 97% (commented here by default)
	' Input.DeNoise();
	' Read the text from the image
	Dim Result = Ocr.Read(Input)
	' Output the extracted text
	Console.WriteLine(Result.Text)
End Using

using IronOcr;
// Instantiate the IronTesseract class
var Ocr = new IronTesseract();

using (var Input = new OcrInput())
{
    // OCR entire document
    // Add a PDF using file path and optional password
    Input.AddPdf("example.pdf", "password");

    // Alternatively, OCR specific pages of a PDF
    Input.AddPdfPages("example.pdf", new[] { 1, 2, 3 }, "password");

    // Read and extract text from the input document
    var Result = Ocr.Read(Input);
    // Output the extracted text from the PDF
    Console.WriteLine(Result.Text);
}

using IronOcr;
// Instantiate the IronTesseract class
var Ocr = new IronTesseract();

using (var Input = new OcrInput())
{
    // OCR entire document
    // Add a PDF using file path and optional password
    Input.AddPdf("example.pdf", "password");

    // Alternatively, OCR specific pages of a PDF
    Input.AddPdfPages("example.pdf", new[] { 1, 2, 3 }, "password");

    // Read and extract text from the input document
    var Result = Ocr.Read(Input);
    // Output the extracted text from the PDF
    Console.WriteLine(Result.Text);
}

Imports IronOcr
' Instantiate the IronTesseract class
Private Ocr = New IronTesseract()

Using Input = New OcrInput()
	' OCR entire document
	' Add a PDF using file path and optional password
	Input.AddPdf("example.pdf", "password")

	' Alternatively, OCR specific pages of a PDF
	Input.AddPdfPages("example.pdf", { 1, 2, 3 }, "password")

	' Read and extract text from the input document
	Dim Result = Ocr.Read(Input)
	' Output the extracted text from the PDF
	Console.WriteLine(Result.Text)
End Using

Conclusion

After comparing all the OCR software options, we conclude that IronOCR is superior to the other options mentioned in this article. Highly customizable with various functions, IronOCR is both effective and affordable for developers and companies. More details about IronOCR's pricing can be found via this link.