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English | [简体中文](README_zh-CN.md)

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## Introduction

MMDetection3D is an open source object detection toolbox based on PyTorch, towards the next-generation platform for general 3D detection. It is a part of the [OpenMMLab](https://openmmlab.com/) project.

The main branch works with **PyTorch 1.8+**.

![demo image](resources/mmdet3d_outdoor_demo.gif)

<details open>
<summary>Major features</summary>

- **Support multi-modality/single-modality detectors out of box**

  It directly supports multi-modality/single-modality detectors including MVXNet, VoteNet, PointPillars, etc.

- **Support indoor/outdoor 3D detection out of box**

  It directly supports popular indoor and outdoor 3D detection datasets, including ScanNet, SUNRGB-D, Waymo, nuScenes, Lyft, and KITTI. For nuScenes dataset, we also support [nuImages dataset](https://github.com/open-mmlab/mmdetection3d/tree/main/configs/nuimages).

- **Natural integration with 2D detection**

  All the about **300+ models, methods of 40+ papers**, and modules supported in [MMDetection](https://github.com/open-mmlab/mmdetection/blob/3.x/docs/en/model_zoo.md) can be trained or used in this codebase.

- **High efficiency**

  It trains faster than other codebases. The main results are as below. Details can be found in [benchmark.md](./docs/en/notes/benchmarks.md). We compare the number of samples trained per second (the higher, the better). The models that are not supported by other codebases are marked by `✗`.

  |       Methods       | MMDetection3D | [OpenPCDet](https://github.com/open-mmlab/OpenPCDet) | [votenet](https://github.com/facebookresearch/votenet) | [Det3D](https://github.com/poodarchu/Det3D) |
  | :-----------------: | :-----------: | :--------------------------------------------------: | :----------------------------------------------------: | :-----------------------------------------: |
  |       VoteNet       |      358      |                          ✗                           |                           77                           |                      ✗                      |
  |  PointPillars-car   |      141      |                          ✗                           |                           ✗                            |                     140                     |
  | PointPillars-3class |      107      |                          44                          |                           ✗                            |                      ✗                      |
  |       SECOND        |      40       |                          30                          |                           ✗                            |                      ✗                      |
  |       Part-A2       |      17       |                          14                          |                           ✗                            |                      ✗                      |

</details>

Like [MMDetection](https://github.com/open-mmlab/mmdetection) and [MMCV](https://github.com/open-mmlab/mmcv), MMDetection3D can also be used as a library to support different projects on top of it.

## What's New

### Highlight

**We have renamed the branch `1.1` to `main` and switched the default branch from `master` to `main`. We encourage users to migrate to the latest version, though it comes with some cost. Please refer to [Migration Guide](docs/en/migration.md) for more details.**

We have constructed a comprehensive LiDAR semantic segmentation benchmark on SemanticKITTI, including Cylinder3D, MinkUNet and SPVCNN methods. Noteworthy, the improved MinkUNetv2 can achieve 70.3 mIoU on the validation set of SemanticKITTI. We have also supported the training of BEVFusion and an occupancy prediction method, TPVFormer, in our `projects`. More new features about 3D perception are on the way. Please stay tuned!

**v1.1.1** was released in 30/5/2023:

- Support [TPVFormer](https://arxiv.org/pdf/2302.07817.pdf) in `projects`
- Support the training of BEVFusion in `projects`
- Support lidar-based 3D semantic segmentation benchmark

## Installation

Please refer to [Installation](https://mmdetection3d.readthedocs.io/en/latest/get_started.html) for installation instructions.

## Getting Started

For detailed user guides and advanced guides, please refer to our [documentation](https://mmdetection3d.readthedocs.io/en/latest/):

<details>
<summary>User Guides</summary>

- [Train & Test](https://mmdetection3d.readthedocs.io/en/latest/user_guides/index.html#train-test)
  - [Learn about Configs](https://mmdetection3d.readthedocs.io/en/latest/user_guides/config.html)
  - [Coordinate System](https://mmdetection3d.readthedocs.io/en/latest/user_guides/coord_sys_tutorial.html)
  - [Dataset Preparation](https://mmdetection3d.readthedocs.io/en/latest/user_guides/dataset_prepare.html)
  - [Customize Data Pipelines](https://mmdetection3d.readthedocs.io/en/latest/user_guides/data_pipeline.html)
  - [Test and Train on Standard Datasets](https://mmdetection3d.readthedocs.io/en/latest/user_guides/train_test.html)
  - [Inference](https://mmdetection3d.readthedocs.io/en/latest/user_guides/inference.html)
  - [Train with Customized Datasets](https://mmdetection3d.readthedocs.io/en/latest/user_guides/new_data_model.html)
- [Useful Tools](https://mmdetection3d.readthedocs.io/en/latest/user_guides/index.html#useful-tools)

</details>

<details>
<summary>Advanced Guides</summary>

- [Datasets](https://mmdetection3d.readthedocs.io/en/latest/advanced_guides/index.html#datasets)
  - [KITTI Dataset](https://mmdetection3d.readthedocs.io/en/latest/advanced_guides/datasets/kitti.html)
  - [NuScenes Dataset](https://mmdetection3d.readthedocs.io/en/latest/advanced_guides/datasets/nuscenes.html)
  - [Lyft Dataset](https://mmdetection3d.readthedocs.io/en/latest/advanced_guides/datasets/lyft.html)
  - [Waymo Dataset](https://mmdetection3d.readthedocs.io/en/latest/advanced_guides/datasets/waymo.html)
  - [SUN RGB-D Dataset](https://mmdetection3d.readthedocs.io/en/latest/advanced_guides/datasets/sunrgbd.html)
  - [ScanNet Dataset](https://mmdetection3d.readthedocs.io/en/latest/advanced_guides/datasets/scannet.html)
  - [S3DIS Dataset](https://mmdetection3d.readthedocs.io/en/latest/advanced_guides/datasets/s3dis.html)
  - [SemanticKITTI Dataset](https://mmdetection3d.readthedocs.io/en/latest/advanced_guides/datasets/semantickitti.html)
- [Supported Tasks](https://mmdetection3d.readthedocs.io/en/latest/advanced_guides/index.html#supported-tasks)
  - [LiDAR-Based 3D Detection](https://mmdetection3d.readthedocs.io/en/latest/advanced_guides/supported_tasks/lidar_det3d.html)
  - [Vision-Based 3D Detection](https://mmdetection3d.readthedocs.io/en/latest/advanced_guides/supported_tasks/vision_det3d.html)
  - [LiDAR-Based 3D Semantic Segmentation](https://mmdetection3d.readthedocs.io/en/latest/advanced_guides/supported_tasks/lidar_sem_seg3d.html)
- [Customization](https://mmdetection3d.readthedocs.io/en/latest/advanced_guides/index.html#customization)
  - [Customize Datasets](https://mmdetection3d.readthedocs.io/en/latest/advanced_guides/customize_dataset.html)
  - [Customize Models](https://mmdetection3d.readthedocs.io/en/latest/advanced_guides/customize_models.html)
  - [Customize Runtime Settings](https://mmdetection3d.readthedocs.io/en/latest/advanced_guides/customize_runtime.html)

</details>

## Overview of Benchmark and Model Zoo

Results and models are available in the [model zoo](docs/en/model_zoo.md).

<div align="center">
  <b>Components</b>
</div>
<table align="center">
  <tbody>
    <tr align="center" valign="bottom">
      <td>
        <b>Backbones</b>
      </td>
      <td>
        <b>Heads</b>
      </td>
      <td>
        <b>Features</b>
      </td>
    </tr>
    <tr valign="top">
      <td>
      <ul>
        <li><a href="configs/pointnet2">PointNet (CVPR'2017)</a></li>
        <li><a href="configs/pointnet2">PointNet++ (NeurIPS'2017)</a></li>
        <li><a href="configs/regnet">RegNet (CVPR'2020)</a></li>
        <li><a href="configs/dgcnn">DGCNN (TOG'2019)</a></li>
        <li>DLA (CVPR'2018)</li>
        <li>MinkResNet (CVPR'2019)</li>
        <li><a href="configs/minkunet">MinkUNet (CVPR'2019)</a></li>
        <li><a href="configs/cylinder3d">Cylinder3D (CVPR'2021)</a></li>
      </ul>
      </td>
      <td>
      <ul>
        <li><a href="configs/free_anchor">FreeAnchor (NeurIPS'2019)</a></li>
      </ul>
      </td>
      <td>
      <ul>
        <li><a href="configs/dynamic_voxelization">Dynamic Voxelization (CoRL'2019)</a></li>
      </ul>
      </td>
    </tr>
</td>
    </tr>
  </tbody>
</table>

<div align="center">
  <b>Architectures</b>
</div>
<table align="center">
  <tbody>
    <tr align="center" valign="middle">
      <td>
        <b>LiDAR-based 3D Object Detection</b>
      </td>
      <td>
        <b>Camera-based 3D Object Detection</b>
      </td>
      <td>
        <b>Multi-modal 3D Object Detection</b>
      </td>
      <td>
        <b>3D Semantic Segmentation</b>
      </td>
    </tr>
    <tr valign="top">
      <td>
        <li><b>Outdoor</b></li>
        <ul>
            <li><a href="configs/second">SECOND (Sensor'2018)</a></li>
            <li><a href="configs/pointpillars">PointPillars (CVPR'2019)</a></li>
            <li><a href="configs/ssn">SSN (ECCV'2020)</a></li>
            <li><a href="configs/3dssd">3DSSD (CVPR'2020)</a></li>
            <li><a href="configs/sassd">SA-SSD (CVPR'2020)</a></li>
            <li><a href="configs/point_rcnn">PointRCNN (CVPR'2019)</a></li>
            <li><a href="configs/parta2">Part-A2 (TPAMI'2020)</a></li>
            <li><a href="configs/centerpoint">CenterPoint (CVPR'2021)</a></li>
            <li><a href="configs/pv_rcnn">PV-RCNN (CVPR'2020)</a></li>
            <li><a href="projects/CenterFormer">CenterFormer (ECCV'2022)</a></li>
        </ul>
        <li><b>Indoor</b></li>
        <ul>
            <li><a href="configs/votenet">VoteNet (ICCV'2019)</a></li>
            <li><a href="configs/h3dnet">H3DNet (ECCV'2020)</a></li>
            <li><a href="configs/groupfree3d">Group-Free-3D (ICCV'2021)</a></li>
            <li><a href="configs/fcaf3d">FCAF3D (ECCV'2022)</a></li>
            <li><a href="projects/TR3D">TR3D (ArXiv'2023)</a></li>
      </ul>
      </td>
      <td>
        <li><b>Outdoor</b></li>
        <ul>
          <li><a href="configs/imvoxelnet">ImVoxelNet (WACV'2022)</a></li>
          <li><a href="configs/smoke">SMOKE (CVPRW'2020)</a></li>
          <li><a href="configs/fcos3d">FCOS3D (ICCVW'2021)</a></li>
          <li><a href="configs/pgd">PGD (CoRL'2021)</a></li>
          <li><a href="configs/monoflex">MonoFlex (CVPR'2021)</a></li>
          <li><a href="projects/DETR3D">DETR3D (CoRL'2021)</a></li>
          <li><a href="projects/PETR">PETR (ECCV'2022)</a></li>
        </ul>
        <li><b>Indoor</b></li>
        <ul>
          <li><a href="configs/imvoxelnet">ImVoxelNet (WACV'2022)</a></li>
        </ul>
      </td>
      <td>
        <li><b>Outdoor</b></li>
        <ul>
          <li><a href="configs/mvxnet">MVXNet (ICRA'2019)</a></li>
          <li><a href="projects/BEVFusion">BEVFusion (ICRA'2023)</a></li>
        </ul>
        <li><b>Indoor</b></li>
        <ul>
          <li><a href="configs/imvotenet">ImVoteNet (CVPR'2020)</a></li>
        </ul>
      </td>
      <td>
        <li><b>Outdoor</b></li>
        <ul>
          <li><a href="configs/minkunet">MinkUNet (CVPR'2019)</a></li>
          <li><a href="configs/spvcnn">SPVCNN (ECCV'2020)</a></li>
          <li><a href="configs/cylinder3d">Cylinder3D (CVPR'2021)</a></li>
          <li><a href="projects/TPVFormer">TPVFormer (CVPR'2023)</a></li>
        </ul>
        <li><b>Indoor</b></li>
        <ul>
          <li><a href="configs/pointnet2">PointNet++ (NeurIPS'2017)</a></li>
          <li><a href="configs/paconv">PAConv (CVPR'2021)</a></li>
          <li><a href="configs/dgcnn">DGCNN (TOG'2019)</a></li>
        </ul>
      </ul>
      </td>
    </tr>
</td>
    </tr>
  </tbody>
</table>

|               | ResNet | VoVNet | Swin-T | PointNet++ | SECOND | DGCNN | RegNetX | DLA | MinkResNet | Cylinder3D | MinkUNet |
| :-----------: | :----: | :----: | :----: | :--------: | :----: | :---: | :-----: | :-: | :--------: | :--------: | :------: |
|    SECOND     |   ✗    |   ✗    |   ✗    |     ✗      |   ✓    |   ✗   |    ✗    |  ✗  |     ✗      |     ✗      |    ✗     |
| PointPillars  |   ✗    |   ✗    |   ✗    |     ✗      |   ✓    |   ✗   |    ✓    |  ✗  |     ✗      |     ✗      |    ✗     |
|  FreeAnchor   |   ✗    |   ✗    |   ✗    |     ✗      |   ✗    |   ✗   |    ✓    |  ✗  |     ✗      |     ✗      |    ✗     |
|    VoteNet    |   ✗    |   ✗    |   ✗    |     ✓      |   ✗    |   ✗   |    ✗    |  ✗  |     ✗      |     ✗      |    ✗     |
|    H3DNet     |   ✗    |   ✗    |   ✗    |     ✓      |   ✗    |   ✗   |    ✗    |  ✗  |     ✗      |     ✗      |    ✗     |
|     3DSSD     |   ✗    |   ✗    |   ✗    |     ✓      |   ✗    |   ✗   |    ✗    |  ✗  |     ✗      |     ✗      |    ✗     |
|    Part-A2    |   ✗    |   ✗    |   ✗    |     ✗      |   ✓    |   ✗   |    ✗    |  ✗  |     ✗      |     ✗      |    ✗     |
|    MVXNet     |   ✓    |   ✗    |   ✗    |     ✗      |   ✓    |   ✗   |    ✗    |  ✗  |     ✗      |     ✗      |    ✗     |
|  CenterPoint  |   ✗    |   ✗    |   ✗    |     ✗      |   ✓    |   ✗   |    ✗    |  ✗  |     ✗      |     ✗      |    ✗     |
|      SSN      |   ✗    |   ✗    |   ✗    |     ✗      |   ✗    |   ✗   |    ✓    |  ✗  |     ✗      |     ✗      |    ✗     |
|   ImVoteNet   |   ✓    |   ✗    |   ✗    |     ✓      |   ✗    |   ✗   |    ✗    |  ✗  |     ✗      |     ✗      |    ✗     |
|    FCOS3D     |   ✓    |   ✗    |   ✗    |     ✗      |   ✗    |   ✗   |    ✗    |  ✗  |     ✗      |     ✗      |    ✗     |
|  PointNet++   |   ✗    |   ✗    |   ✗    |     ✓      |   ✗    |   ✗   |    ✗    |  ✗  |     ✗      |     ✗      |    ✗     |
| Group-Free-3D |   ✗    |   ✗    |   ✗    |     ✓      |   ✗    |   ✗   |    ✗    |  ✗  |     ✗      |     ✗      |    ✗     |
|  ImVoxelNet   |   ✓    |   ✗    |   ✗    |     ✗      |   ✗    |   ✗   |    ✗    |  ✗  |     ✗      |     ✗      |    ✗     |
|    PAConv     |   ✗    |   ✗    |   ✗    |     ✓      |   ✗    |   ✗   |    ✗    |  ✗  |     ✗      |     ✗      |    ✗     |
|     DGCNN     |   ✗    |   ✗    |   ✗    |     ✗      |   ✗    |   ✓   |    ✗    |  ✗  |     ✗      |     ✗      |    ✗     |
|     SMOKE     |   ✗    |   ✗    |   ✗    |     ✗      |   ✗    |   ✗   |    ✗    |  ✓  |     ✗      |     ✗      |    ✗     |
|      PGD      |   ✓    |   ✗    |   ✗    |     ✗      |   ✗    |   ✗   |    ✗    |  ✗  |     ✗      |     ✗      |    ✗     |
|   MonoFlex    |   ✗    |   ✗    |   ✗    |     ✗      |   ✗    |   ✗   |    ✗    |  ✓  |     ✗      |     ✗      |    ✗     |
|    SA-SSD     |   ✗    |   ✗    |   ✗    |     ✗      |   ✓    |   ✗   |    ✗    |  ✗  |     ✗      |     ✗      |    ✗     |
|    FCAF3D     |   ✗    |   ✗    |   ✗    |     ✗      |   ✗    |   ✗   |    ✗    |  ✗  |     ✓      |     ✗      |    ✗     |
|    PV-RCNN    |   ✗    |   ✗    |   ✗    |     ✗      |   ✓    |   ✗   |    ✗    |  ✗  |     ✗      |     ✗      |    ✗     |
|  Cylinder3D   |   ✗    |   ✗    |   ✗    |     ✗      |   ✗    |   ✗   |    ✗    |  ✗  |     ✗      |     ✓      |    ✗     |
|   MinkUNet    |   ✗    |   ✗    |   ✗    |     ✗      |   ✗    |   ✗   |    ✗    |  ✗  |     ✗      |     ✗      |    ✓     |
|    SPVCNN     |   ✗    |   ✗    |   ✗    |     ✗      |   ✗    |   ✗   |    ✗    |  ✗  |     ✗      |     ✗      |    ✓     |
|   BEVFusion   |   ✗    |   ✗    |   ✓    |     ✗      |   ✓    |   ✗   |    ✗    |  ✗  |     ✗      |     ✗      |    ✗     |
| CenterFormer  |   ✗    |   ✗    |   ✗    |     ✗      |   ✓    |   ✗   |    ✗    |  ✗  |     ✗      |     ✗      |    ✗     |
|     TR3D      |   ✗    |   ✗    |   ✗    |     ✗      |   ✗    |   ✗   |    ✗    |  ✗  |     ✓      |     ✗      |    ✗     |
|    DETR3D     |   ✓    |   ✓    |   ✗    |     ✗      |   ✗    |   ✗   |    ✗    |  ✗  |     ✗      |     ✗      |    ✗     |
|     PETR      |   ✗    |   ✓    |   ✗    |     ✗      |   ✗    |   ✗   |    ✗    |  ✗  |     ✗      |     ✗      |    ✗     |
|   TPVFormer   |   ✓    |   ✗    |   ✗    |     ✗      |   ✗    |   ✗   |    ✗    |  ✗  |     ✗      |     ✗      |    ✗     |

**Note:** All the about **300+ models, methods of 40+ papers** in 2D detection supported by [MMDetection](https://github.com/open-mmlab/mmdetection/blob/3.x/docs/en/model_zoo.md) can be trained or used in this codebase.

## FAQ

Please refer to [FAQ](docs/en/notes/faq.md) for frequently asked questions.

## Contributing

We appreciate all contributions to improve MMDetection3D. Please refer to [CONTRIBUTING.md](docs/en/notes/contribution_guides.md) for the contributing guideline.

## Acknowledgement

MMDetection3D is an open source project that is contributed by researchers and engineers from various colleges and companies. We appreciate all the contributors 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 3D detectors.

## Citation

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

```latex
@misc{mmdet3d2020,
    title={{MMDetection3D: OpenMMLab} next-generation platform for general {3D} object detection},
    author={MMDetection3D Contributors},
    howpublished = {\url{https://github.com/open-mmlab/mmdetection3d}},
    year={2020}
}
```

## License

This project is released under the [Apache 2.0 license](LICENSE).

## Projects in OpenMMLab

- [MMEngine](https://github.com/open-mmlab/mmengine): OpenMMLab foundational library for training deep learning models.
- [MMCV](https://github.com/open-mmlab/mmcv): OpenMMLab foundational library for computer vision.
- [MMEval](https://github.com/open-mmlab/mmeval): A unified evaluation library for multiple machine learning libraries.
- [MIM](https://github.com/open-mmlab/mim): MIM installs OpenMMLab packages.
- [MMPreTrain](https://github.com/open-mmlab/mmpretrain): OpenMMLab pre-training toolbox and benchmark.
- [MMDetection](https://github.com/open-mmlab/mmdetection): OpenMMLab detection toolbox and benchmark.
- [MMDetection3D](https://github.com/open-mmlab/mmdetection3d): OpenMMLab's next-generation platform for general 3D object detection.
- [MMRotate](https://github.com/open-mmlab/mmrotate): OpenMMLab rotated object detection toolbox and benchmark.
- [MMYOLO](https://github.com/open-mmlab/mmyolo): OpenMMLab YOLO series toolbox and benchmark.
- [MMSegmentation](https://github.com/open-mmlab/mmsegmentation): OpenMMLab semantic segmentation toolbox and benchmark.
- [MMOCR](https://github.com/open-mmlab/mmocr): OpenMMLab text detection, recognition, and understanding toolbox.
- [MMPose](https://github.com/open-mmlab/mmpose): OpenMMLab pose estimation toolbox and benchmark.
- [MMHuman3D](https://github.com/open-mmlab/mmhuman3d): OpenMMLab 3D human parametric model toolbox and benchmark.
- [MMSelfSup](https://github.com/open-mmlab/mmselfsup): OpenMMLab self-supervised learning toolbox and benchmark.
- [MMRazor](https://github.com/open-mmlab/mmrazor): OpenMMLab model compression toolbox and benchmark.
- [MMFewShot](https://github.com/open-mmlab/mmfewshot): OpenMMLab fewshot learning toolbox and benchmark.
- [MMAction2](https://github.com/open-mmlab/mmaction2): OpenMMLab's next-generation action understanding toolbox and benchmark.
- [MMTracking](https://github.com/open-mmlab/mmtracking): OpenMMLab video perception toolbox and benchmark.
- [MMFlow](https://github.com/open-mmlab/mmflow): OpenMMLab optical flow toolbox and benchmark.
- [MMagic](https://github.com/open-mmlab/mmagic): Open**MM**Lab **A**dvanced, **G**enerative and **I**ntelligent **C**reation toolbox.
- [MMGeneration](https://github.com/open-mmlab/mmgeneration): OpenMMLab image and video generative models toolbox.
- [MMDeploy](https://github.com/open-mmlab/mmdeploy): OpenMMLab model deployment framework.
