Kraken

Mac · Linux · API

Freedom report

One barScore 5.7

Kraken is ranked #28 of 40 in OCR software on Freedom251. It runs on API, Linux, macOS.

Compared on OCR software

Word export: No
Primary platform: desktop
Supported inputs: both
Purpose: Kraken is an open-source automatic text recognition system optimized for historical documents and non-Latin scripts.
Intended users: Kraken is designed for humanities digitization, including work with low-resource languages and diverse, non-conventional scripts.
Interfaces: Kraken provides a customizable command-line interface and a Python API for custom workflows and integrations.
Trainable tasks: Its features include trainable layout analysis, reading order, and character recognition.
Script directions: Kraken supports right-to-left, bidirectional, and top-to-bottom scripts.
Output formats: Kraken can output ALTO, PageXML, abbyyXML, and hOCR, and supports word bounding boxes and character cuts.
Model repository: Kraken provides a public repository of freely available models, accessed through its command-line tools.
Integrations: The documentation lists eScriptorium, OCR4all, OCR-D, and arkindex by Teklia as applications or suites integrated with Kraken through its API or a plugin.
Python API: The Python API includes task-oriented classes for segmentation, recognition, and forced alignment.
Extensibility: Kraken’s plugin system lets developers add commands, model types, and tasks through Python entry points.
Installation: The getting-started guide says Kraken runs on Linux and macOS on x64 and ARM, and supports Python 3.10 through 3.13.

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