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[![GitHub Release](https://img.shields.io/github/v/release/openvinotoolkit/nncf?color=green)](https://github.com/openvinotoolkit/nncf/releases) | ||
[![Website](https://img.shields.io/website?up_color=blue&up_message=docs&url=https%3A%2F%2Fdocs.openvino.ai%2Flatest%2Fopenvino_docs_model_optimization_guide.html)](https://docs.openvino.ai/nncf) | ||
[![Apache License Version 2.0](https://img.shields.io/badge/license-Apache_2.0-green.svg)](https://github.com/openvinotoolkit/nncf?tab=Apache-2.0-1-ov-file#readme) | ||
[![PyPI Downloads](https://static.pepy.tech/badge/nncf)](https://pypi.org/project/nncf/) | ||
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# Neural Network Compression Framework (NNCF) | ||
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Neural Network Compression Framework (NNCF) provides a suite of post-training | ||
and training-time algorithms for optimizing inference of neural networks in | ||
[OpenVINO™](https://docs.openvino.ai) with a minimal accuracy drop. | ||
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NNCF is designed to work with models from [PyTorch](https://pytorch.org/), | ||
[TensorFlow](https://www.tensorflow.org/), [ONNX](https://onnx.ai/) and | ||
[OpenVINO™](https://docs.openvino.ai). | ||
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The framework is organized as a Python package that can be built and used | ||
as a standalone tool. Its architecture is unified to make adding different | ||
compression algorithms easy for both PyTorch and TensorFlow. | ||
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NNCF provides samples that demonstrate the usage of compression algorithms | ||
for different use cases and models. See compression results achievable | ||
with the NNCF-powered samples on the | ||
[NNCF Model Zoo page](https://github.com/openvinotoolkit/nncf/blob/develop/docs/ModelZoo.md). | ||
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For more information about NNCF, see: | ||
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- [NNCF repository](https://github.com/openvinotoolkit/nncf) | ||
- [User documentation](https://docs.openvino.ai/nncf) | ||
- [NNCF API documentation](https://openvinotoolkit.github.io/nncf/autoapi/nncf/) | ||
- [Usage examples](https://github.com/openvinotoolkit/nncf/tree/develop/docs/usage) | ||
- [Notebook tutorials](https://github.com/openvinotoolkit/openvino_notebooks/blob/latest/notebooks/README.md#model-training) | ||
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## Table of contents | ||
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- [Key Features](#key-features) | ||
- [Installation](#installation-guide) | ||
- [Third-party integration](#third-party-repository-integration) | ||
- [NNCF Compressed Model Zoo](#nncf-compressed-model-zoo) | ||
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## Key Features<a id="key-features"></a> | ||
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### Post-Training Compression Algorithms | ||
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| Compression algorithm | OpenVINO | PyTorch | TensorFlow | ONNX | | ||
| :---------------------------------------------------------------------------------------------------------------------------------------------------------- | :-------: | :-------: | :-----------: | :-----------: | | ||
| [Post-Training Quantization](https://github.com/openvinotoolkit/nncf/blob/develop/docs/usage/post_training_compression/post_training_quantization/Usage.md) | Supported | Supported | Supported | Supported | | ||
| [Weight Compression](https://github.com/openvinotoolkit/nncf/blob/develop/docs/usage/post_training_compression/weights_compression/Usage.md) | Supported | Supported | Not supported | Not supported | | ||
| [Activation Sparsity](https://github.com/openvinotoolkit/nncf/blob/develop/nncf/experimental/torch/sparsify_activations/ActivationSparsity.md) | Not supported | Experimental |Not supported| Not supported | | ||
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### Training-Time Compression Algorithms | ||
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| Compression algorithm | PyTorch | TensorFlow | | ||
| :-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | :----------: | :-----------: | | ||
| [Quantization Aware Training](https://github.com/openvinotoolkit/nncf/blob/develop/docs/usage/training_time_compression/quantization_aware_training/Usage.md) | Supported | Supported | | ||
| [Mixed-Precision Quantization](https://github.com/openvinotoolkit/nncf/blob/develop/docs/usage/training_time_compression/other_algorithms/LegacyQuantization.md#mixed-precision-quantization) | Supported | Not supported | | ||
| [Sparsity](https://github.com/openvinotoolkit/nncf/blob/develop/docs/usage/training_time_compression/other_algorithms/Sparsity.md) | Supported | Supported | | ||
| [Filter pruning](https://github.com/openvinotoolkit/nncf/blob/develop/docs/usage/training_time_compression/other_algorithms/Pruning.md) | Supported | Supported | | ||
| [Movement pruning](https://github.com/openvinotoolkit/nncf/blob/develop/nncf/experimental/torch/sparsity/movement/MovementSparsity.md) | Experimental | Not supported | | ||
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- Automatic, configurable model graph transformation to obtain the compressed | ||
model. | ||
> **NOTE**: Limited support for TensorFlow models. Only models created using | ||
Sequential or Keras Functional API are supported. | ||
- Common interface for compression methods. | ||
- GPU-accelerated layers for faster compressed model fine-tuning. | ||
- Distributed training support. | ||
- Git patch for prominent third-party repository | ||
([huggingface-transformers](https://github.com/huggingface/transformers)) | ||
demonstrating the process of integrating NNCF into custom training pipelines. | ||
- Seamless combination of pruning, sparsity, and quantization algorithms. Refer | ||
to [optimum-intel](https://github.com/huggingface/optimum-intel/tree/main/examples/openvino) | ||
for examples of joint (movement) pruning, quantization, and distillation | ||
(JPQD), end-to-end from NNCF optimization to compressed OpenVINO IR. | ||
- Exporting PyTorch compressed models to ONNX\* checkpoints and TensorFlow | ||
compressed models to SavedModel or Frozen Graph format, ready to use with | ||
[OpenVINO™ toolkit](https://docs.openvino.ai). | ||
- Support for [Accuracy-Aware model training](https://github.com/openvinotoolkit/nncf/blob/develop/docs/usage/training_time_compression/other_algorithms/Usage.md#accuracy-aware-model-training) | ||
pipelines via the [Adaptive Compression Level Training](https://github.com/openvinotoolkit/nncf/blob/develop/docs/accuracy_aware_model_training/AdaptiveCompressionLevelTraining.md) | ||
and [Early Exit Training](https://github.com/openvinotoolkit/nncf/blob/develop/docs/accuracy_aware_model_training/EarlyExitTraining.md). | ||
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## Installation Guide<a id="installation-guide"></a> | ||
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NNCF can be installed as a regular PyPI package: | ||
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```bash | ||
pip install nncf | ||
``` | ||
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For detailed installation instructions, refer to the | ||
[Installation](https://github.com/openvinotoolkit/nncf/blob/develop/docs/Installation.md) guide. | ||
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### System Requirements | ||
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- Ubuntu 18.04 or later (64-bit) | ||
- Python 3.8 or later | ||
- Supported frameworks: | ||
- PyTorch >=2.2, <2.4 | ||
- TensorFlow >=2.8.4, <=2.15.1 | ||
- ONNX ==1.16.0 | ||
- OpenVINO >=2022.3.0 | ||
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## Third-party Repository Integration<a id="third-party-repository-integration"></a> | ||
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NNCF may be easily integrated into training/evaluation pipelines of third-party | ||
repositories. | ||
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- [OpenVINO Training Extensions](https://github.com/openvinotoolkit/training_extensions) | ||
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NNCF is integrated into OpenVINO Training Extensions as a model optimization | ||
backend. You can train, optimize, and export new models based on available | ||
model templates as well as run the exported models with OpenVINO. | ||
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- [HuggingFace Optimum Intel](https://huggingface.co/docs/optimum/intel/optimization_ov) | ||
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NNCF is used as a compression backend within the renowned `transformers` | ||
repository in HuggingFace Optimum Intel. | ||
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## NNCF Compressed Model Zoo<a id="nncf-compressed-model-zoo"></a> | ||
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A list of models and compression results for them can be found at our | ||
[NNCF Model Zoo page](https://github.com/openvinotoolkit/nncf/blob/develop/docs/ModelZoo.md). | ||
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## Citing | ||
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```bi | ||
@article{kozlov2020neural, | ||
title = {Neural network compression framework for fast model inference}, | ||
author = {Kozlov, Alexander and Lazarevich, Ivan and Shamporov, Vasily and Lyalyushkin, Nikolay and Gorbachev, Yury}, | ||
journal = {arXiv preprint arXiv:2002.08679}, | ||
year = {2020} | ||
} | ||
``` | ||
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## Telemetry | ||
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NNCF as part of the OpenVINO™ toolkit collects anonymous usage data for the | ||
purpose of improving OpenVINO™ tools. You can opt-out at any time by running | ||
the following command in the Python environment where you have NNCF installed: | ||
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`opt_in_out --opt_out` | ||
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More information available on [OpenVINO telemetry](https://docs.openvino.ai/nightly/about-openvino/additional-resources/telemetry.html). |
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