comments: true description: Explore Meituan YOLOv6, a state-of-the-art object detection model striking a balance between speed and accuracy. Dive into features, pre-trained models, and Python usage.

keywords: Meituan YOLOv6, object detection, Ultralytics, YOLOv6 docs, Bi-directional Concatenation, Anchor-Aided Training, pretrained models, real-time applications

Meituan YOLOv6

Overview

Meituan YOLOv6 is a cutting-edge object detector that offers remarkable balance between speed and accuracy, making it a popular choice for real-time applications. This model introduces several notable enhancements on its architecture and training scheme, including the implementation of a Bi-directional Concatenation (BiC) module, an anchor-aided training (AAT) strategy, and an improved backbone and neck design for state-of-the-art accuracy on the COCO dataset.

Overview of YOLOv6. Model architecture diagram showing the redesigned network components and training strategies that have led to significant performance improvements. (a) The neck of YOLOv6 (N and S are shown). Note for M/L, RepBlocks is replaced with CSPStackRep. (b) The structure of a BiC module. (c) A SimCSPSPPF block. (source).

Key Features

Bidirectional Concatenation (BiC) Module: YOLOv6 introduces a BiC module in the neck of the detector, enhancing localization signals and delivering performance gains with negligible speed degradation.
Anchor-Aided Training (AAT) Strategy: This model proposes AAT to enjoy the benefits of both anchor-based and anchor-free paradigms without compromising inference efficiency.
Enhanced Backbone and Neck Design: By deepening YOLOv6 to include another stage in the backbone and neck, this model achieves state-of-the-art performance on the COCO dataset at high-resolution input.
Self-Distillation Strategy: A new self-distillation strategy is implemented to boost the performance of smaller models of YOLOv6, enhancing the auxiliary regression branch during training and removing it at inference to avoid a marked speed decline.

Pre-trained Models

YOLOv6 provides various pre-trained models with different scales:

YOLOv6-N: 37.5% AP on COCO val2017 at 1187 FPS with NVIDIA Tesla T4 GPU.
YOLOv6-S: 45.0% AP at 484 FPS.
YOLOv6-M: 50.0% AP at 226 FPS.
YOLOv6-L: 52.8% AP at 116 FPS.
YOLOv6-L6: State-of-the-art accuracy in real-time.

YOLOv6 also provides quantized models for different precisions and models optimized for mobile platforms.

Usage

You can use YOLOv6 for object detection tasks using the Ultralytics pip package. The following is a sample code snippet showing how to use YOLOv6 models for training:

!!! example ""

This example provides simple training code for YOLOv6. For more options including training settings see [Train](../modes/train.md) mode. For using YOLOv6 with additional modes see [Predict](../modes/predict.md), [Val](../modes/val.md) and [Export](../modes/export.md).

=== "Python"

    PyTorch pretrained `*.pt` models as well as configuration `*.yaml` files can be passed to the `YOLO()` class to create a model instance in python:

    ```python
    from ultralytics import YOLO

    # Build a YOLOv6n model from scratch
    model = YOLO('yolov6n.yaml')

    # Display model information (optional)
    model.info()

    # Train the model on the COCO8 example dataset for 100 epochs
    results = model.train(data='coco8.yaml', epochs=100, imgsz=640)

    # Run inference with the YOLOv6n model on the 'bus.jpg' image
    results = model('path/to/bus.jpg')
    ```

=== "CLI"

    CLI commands are available to directly run the models:

    ```bash
    # Build a YOLOv6n model from scratch and train it on the COCO8 example dataset for 100 epochs
    yolo train model=yolov6n.yaml data=coco8.yaml epochs=100 imgsz=640

    # Build a YOLOv6n model from scratch and run inference on the 'bus.jpg' image
    yolo predict model=yolov6n.yaml source=path/to/bus.jpg
    ```

Supported Tasks

Model Type	Pre-trained Weights	Tasks Supported
YOLOv6-N	`yolov6-n.pt`	Object Detection
YOLOv6-S	`yolov6-s.pt`	Object Detection
YOLOv6-M	`yolov6-m.pt`	Object Detection
YOLOv6-L	`yolov6-l.pt`	Object Detection
YOLOv6-L6	`yolov6-l6.pt`	Object Detection

Supported Modes

Mode	Supported
Inference	:heavy_check_mark:
Validation	:heavy_check_mark:
Training	:heavy_check_mark:

Citations and Acknowledgements

We would like to acknowledge the authors for their significant contributions in the field of real-time object detection:

!!! note ""

=== "BibTeX"

    ```bibtex
    @misc{li2023yolov6,
          title={YOLOv6 v3.0: A Full-Scale Reloading},
          author={Chuyi Li and Lulu Li and Yifei Geng and Hongliang Jiang and Meng Cheng and Bo Zhang and Zaidan Ke and Xiaoming Xu and Xiangxiang Chu},
          year={2023},
          eprint={2301.05586},
          archivePrefix={arXiv},
          primaryClass={cs.CV}
    }
    ```

The original YOLOv6 paper can be found on arXiv. The authors have made their work publicly available, and the codebase can be accessed on GitHub. We appreciate their efforts in advancing the field and making their work accessible to the broader community.

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