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labeling-tool

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cvat

CVAT is a leading data annotation platform for image, video, audio, and 3D datasets. It offers open-source, cloud, and enterprise products, as well as labeling services, with AI-assisted labeling, quality assurance, team collaboration, analytics, and developer APIs.

  • Updated Oct 20, 2026
  • Python
refinery

The data scientist's open-source choice to scale, assess and maintain natural language data. Treat training data like a software artifact.

  • Updated Dec 9, 2024
  • Python

PPOCRLabel is a semi-automatic graphic annotation tool suitable for OCR field, with built-in PP-OCR model to automatically detect and re-recognize data. It is written in Python 3 and PyQT5, supporting rectangular box annotation and four-point annotation modes. Annotations can be directly used for the training of PP-OCR detection and recognition …

  • Updated Jun 29, 2023
  • Python

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