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👉 MMClassification 1.0 branch is in trial, welcome every to try it and discuss with us! 👈


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MMClassification is an open source image classification toolbox based on PyTorch. It is a part of the OpenMMLab project.

The master branch works with PyTorch 1.5+.

Major features

  • Various backbones and pretrained models
  • Bag of training tricks
  • Large-scale training configs
  • High efficiency and extensibility
  • Powerful toolkits

What's new

The MMClassification 1.0 has released! It's still unstable and in release candidate. If you want to try it, go to the 1.x branch and discuss it with us in the discussion.

v0.25.0 was released in 06/12/2022. Highlights of the new version:

  • Support MLU backend.
  • Add for ARM device.

v0.24.1 was released in 31/10/2022. Highlights of the new version:

  • Support HUAWEI Ascend device.

v0.24.0 was released in 30/9/2022. Highlights of the new version:

  • Support HorNet, EfficientFormerm, SwinTransformer V2 and MViT backbones.
  • Support Standford Cars dataset.

Please refer to for more details and other release history.


Below are quick steps for installation:

conda create -n open-mmlab python=3.8 pytorch=1.10 cudatoolkit=11.3 torchvision==0.11.0 -c pytorch -y
conda activate open-mmlab
pip3 install openmim
mim install mmcv-full
git clone
cd mmclassification
pip3 install -e .

Please refer to for more detailed installation and dataset preparation.

Getting Started

Please see Getting Started for the basic usage of MMClassification. There are also tutorials:

Colab tutorials are also provided:

Model zoo

Results and models are available in the model zoo.

Supported backbones


We appreciate all contributions to improve MMClassification. Please refer to for the contributing guideline.


MMClassification is an open source project that is contributed by researchers and engineers from various colleges and companies. We appreciate all the contributors who implement their methods or add new features, as well as users who give valuable feedbacks. We wish that the toolbox and benchmark could serve the growing research community by providing a flexible toolkit to reimplement existing methods and develop their own new classifiers.


If you find this project useful in your research, please consider cite:

    title={OpenMMLab's Image Classification Toolbox and Benchmark},
    author={MMClassification Contributors},
    howpublished = {\url{}},


This project is released under the Apache 2.0 license.

Projects in OpenMMLab

  • MMCV: OpenMMLab foundational library for computer vision.
  • MIM: MIM installs OpenMMLab packages.
  • MMClassification: OpenMMLab image classification toolbox and benchmark.
  • MMDetection: OpenMMLab detection toolbox and benchmark.
  • MMDetection3D: OpenMMLab's next-generation platform for general 3D object detection.
  • MMRotate: OpenMMLab rotated object detection toolbox and benchmark.
  • MMSegmentation: OpenMMLab semantic segmentation toolbox and benchmark.
  • MMOCR: OpenMMLab text detection, recognition, and understanding toolbox.
  • MMPose: OpenMMLab pose estimation toolbox and benchmark.
  • MMHuman3D: OpenMMLab 3D human parametric model toolbox and benchmark.
  • MMSelfSup: OpenMMLab self-supervised learning toolbox and benchmark.
  • MMRazor: OpenMMLab model compression toolbox and benchmark.
  • MMFewShot: OpenMMLab fewshot learning toolbox and benchmark.
  • MMAction2: OpenMMLab's next-generation action understanding toolbox and benchmark.
  • MMTracking: OpenMMLab video perception toolbox and benchmark.
  • MMFlow: OpenMMLab optical flow toolbox and benchmark.
  • MMEditing: OpenMMLab image and video editing toolbox.
  • MMGeneration: OpenMMLab image and video generative models toolbox.
  • MMDeploy: OpenMMLab model deployment framework.

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