OCR Library for PDF and Images in C#
- Recognize text from scanned PDF documents.
- Extract text from images.
- Save OCR results as text, structured data, or searchable PDF documents.
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Overview
The Syncfusion .NET Optical Character Recognition (OCR) library is used to extract text from scanned PDFs and images. With just a few lines of C# code, a scanned PDF document containing a raster image is converted into a searchable and selectable PDF document. Users can save the OCR result as text, structured data, or searchable PDF documents. The .NET OCR library uses the powerful Tesseract OCR engine.
The OCR feature works seamlessly across platforms, including Windows, macOS, and Linux, through any .NET-based applications, such as ASP.NET Core, ASP.NET MVC, Blazor, WinForms, WPF, and WinUI.
Convert scanned PDF to a searchable PDF in C#
The below code demonstrates how to convert scanned PDF to a searchable PDF.
Key features of the OCR library
Discover the features of our OCR processor library to enhance text extraction, language recognition, and document processing for seamless integration.
Create a searchable PDF
Perform OCR on an entire scanned PDF document and convert it into a searchable PDF document.
Extract text from an image
Extract text from a single scanned image or multi-page TIFF images.
Perform OCR on a rotated page
Extract the text from a scanned, rotated page of a PDF document and convert it to a searchable PDF document.
Convert image to searchable PDF/A
Make images searchable and selectable by converting them to PDF or PDF/A document using OCR.
Zonal text extraction
Extract data from PDFs and images by restricting OCR to a particular region in a PDF or image.
Post-processing
After performing OCR, you can programmatically highlight, underline, and strike through the text of the resulting PDF document. You can also redact, edit, and digitally sign the PDF document.
Explore references for the .NET OCR library
Discover valuable resources from our blog and knowledge base on using the OCR library.
Explore these resources for comprehensive guides, knowledge base articles, insightful blogs, and ebooks.
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Frequently Asked Questions
What is OCR?
OCR stands for optical character recognition. It is a technology used to convert different types of documents, such as scanned paper documents, PDF files, or images captured by a digital camera, into editable and searchable data.
What types of documents can OCR process?
OCR can process various types of documents, including scanned paper documents, PDF files, images, screenshots, and photographs containing printed or handwritten text.
How does OCR work for PDF and images?
The OCR library analyzes the shapes, patterns, and structures within an image or PDF file to identify and extract text. It then converts this extracted text into a format that can be edited, searched, and manipulated.
What are the benefits of using OCR on PDF documents and images?
OCR lets you convert non-editable documents, such as scanned images or PDF files, into editable and searchable formats. This allows for easier document management, text extraction, content indexing, and accessibility improvements.
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