OCR a Region of an Image This example demonstrates a 41% speed improvement by choosing a specific area of an image to perform OCR (Optical Character Recognition) in .NET. These are called ContentAreas or CropAreas. How to Crop Specific Area of Image in C# Download a C# library to crop a specific area of an image Instantiate the IronTesseract class. Instantiate the CropRectangle object with the specified region. Use the AddImage method to add the image along with the crop details. Use the Read method to read from the specified region. Discover How to Use Input Images with IronOCR Related Docs Links View on Github Related Tutorial Related How-To Guide Class Documentation OCR Language Packs Download IronOCR DLL Report an Issue on this page Ready to Get Started? Nuget Downloads 5,044,537 | Version: 2025.11 just released Free NuGet Download Total downloads: 5,044,537 View Licenses