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How to Custom Font Training for Tesseract 5 in C#

Name: IronOCR
Brand: Iron Software
Availability: InStock
Rating: 4.86 (101 reviews)

Kannapat Udonpant

April 16, 2025

In this tutorial, we walk through the process of training Tesseract 5 OCR with custom fonts. Beginning with downloading Iron OCR for Windows, we establish a Linux environment using WSL and Ubuntu for effective test training. The tutorial details commands to install required packages and libraries, ensuring a smooth setup. Custom fonts are integrated by copying files to designated directories and updating configuration files. Using GitHub repositories, we download and prepare necessary tutorial files, adjusting paths and settings to accommodate custom fonts. The guide explains generating box and TIFF image files, crucial for training, and modifies file extensions for compatibility. By replacing default training data with enhanced files from GitHub, we create a custom font.training data file. The training process, set for 100 iterations, is highlighted, with recommendations for increasing iterations and training sets for improved accuracy. This comprehensive tutorial ensures users can effectively train OCR systems to recognize custom fonts, enhancing the utility of OCR libraries.

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Kannapat Udonpant

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Software Engineer

Before becoming a Software Engineer, Kannapat completed a Environmental Resources PhD from Hokkaido University in Japan. While pursuing his degree, Kannapat also became a member of the Vehicle Robotics Laboratory, which is part of the Department of Bioproduction Engineering. In 2022, he leveraged his C# skills to join Iron Software's engineering team, where he focuses on IronPDF. Kannapat values his job because he learns directly from the developer who writes most of the code used in IronPDF. In addition to peer learning, Kannapat enjoys the social aspect of working at Iron Software. When he's not writing code or documentation, Kannapat can usually be found gaming on his PS5 or rewatching The Last of Us.

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