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OpenVINO™ Training Extensions

Key FeaturesInstallationDocumentationLicense


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OpenVINO™ Training Extensions is a low-code transfer learning framework for Computer Vision. The API & CLI commands of the framework allows users to train, infer, optimize and deploy models easily and quickly even with low expertise in the deep learning field. OpenVINO™ Training Extensions offers diverse combinations of model architectures, learning methods, and task types based on PyTorch and OpenVINO™ toolkit.

OpenVINO™ Training Extensions provides a "recipe" for every supported task type, which consolidates necessary information to build a model. Model templates are validated on various datasets and serve one-stop shop for obtaining the best models in general. If you are an experienced user, you can configure your own model based on torchvision, mmcv and OpenVINO Model Zoo (OMZ).

Furthermore, OpenVINO™ Training Extensions provides automatic configuration for ease of use. The framework will analyze your dataset and identify the most suitable model and figure out the best input size setting and other hyper-parameters. The development team is continuously extending this Auto-configuration functionalities to make training as simple as possible so that single CLI command can obtain accurate, efficient and robust models ready to be integrated into your project.

Key Features

OpenVINO™ Training Extensions supports the following computer vision tasks:

  • Classification, including multi-class, multi-label and hierarchical image classification tasks.
  • Object detection including rotated bounding box support
  • Semantic segmentation
  • Instance segmentation including tiling algorithm support
  • Action recognition including action classification and detection
  • Anomaly recognition tasks including anomaly classification, detection and segmentation
  • Visual Prompting tasks including segment anything model, zero-shot visual prompting

OpenVINO™ Training Extensions supports the following learning methods:

  • Supervised, incremental training, which includes class incremental scenario.

OpenVINO™ Training Extensions provides the following usability features:

  • Auto-configuration. OpenVINO™ Training Extensions analyzes provided dataset and selects the proper task and model to provide the best accuracy/speed trade-off.
  • Datumaro data frontend: OpenVINO™ Training Extensions supports the most common academic field dataset formats for each task. We are constantly working to extend supported formats to give more freedom of datasets format choice.
  • Distributed training to accelerate the training process when you have multiple GPUs
  • Mixed-precision training to save GPUs memory and use larger batch sizes
  • Integrated, efficient hyper-parameter optimization module (HPO). Through dataset proxy and built-in hyper-parameter optimizer, you can get much faster hyper-parameter optimization compared to other off-the-shelf tools. The hyperparameter optimization is dynamically scheduled based on your resource budget.


Please refer to the installation guide. If you want to make changes to the library, then a local installation is recommended.

Install from PyPI Installing the library with pip is the easiest way to get started with otx.
pip install otx

This will install OTX CLI. OTX requires torch and lightning by default to provide training. To use the full pipeline, you need the commands below:

# Get help for the installation arguments
otx install -h

# Install the full package
otx install

# Install with verbose output
otx install -v

# Install with docs option only.
otx install --option docs
Install from source To install from source, you need to clone the repository and install the library using pip via editable mode.
# Use of virtual environment is highy recommended
# Using conda
yes | conda create -n otx_env python=3.10
conda activate otx_env

# Or using your favorite virtual environment
# ...

# Clone the repository and install in editable mode
git clone
cd training_extensions
pip install -e .

This will install OTX CLI. OTX requires torch and lightning by default to provide training. To use the full pipeline, you need the commands below:

# Get help for the installation arguments
otx install -h

# Install the full package
otx install

# Install with verbose output
otx install -v

# Install with docs option only.
otx install --option docs


OpenVINO™ Training Extensions supports both API and CLI-based training. The API is more flexible and allows for more customization, while the CLI training utilizes command line interfaces, and might be easier for those who would like to use OpenVINO™ Training Extensions off-the-shelf.

For the CLI, the commands below provide subcommands, how to use each subcommand, and more:

# See available subcommands
otx --help

# Print help messages from the train subcommand
otx train --help

You can find details with examples in the CLI Guide. and API Quick-Guide.

Below is how to train with auto-configuration, which is provided to users with datasets and tasks:

Training via API
# Training with Auto-Configuration via Engine
from otx.engine import Engine

engine = Engine(data_root="data/wgisd", task="DETECTION")

For more examples, see documentation: CLI Guide

Training via CLI
otx train --data_root data/wgisd --task DETECTION

For more examples, see documentation: API Quick-Guide

In addition to the examples above, please refer to the documentation for tutorials on using custom models, training parameter overrides, and tutorial per task types, etc.


v2.0.0 (1Q24)


Release History

Please refer to the


  • develop
    • Mainly maintained branch for developing new features for the future release
  • misc
    • Previously developed models can be found on this branch


OpenVINO™ Toolkit is licensed under Apache License Version 2.0. By contributing to the project, you agree to the license and copyright terms therein and release your contribution under these terms.

Issues / Discussions

Please use Issues tab for your bug reporting, feature requesting, or any questions.

Known limitations

misc branch contains training, evaluation, and export scripts for models based on TensorFlow and PyTorch. These scripts are not ready for production. They are exploratory and have not been validated.


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For those who would like to contribute to the library, see for details.

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