vision-understanding ·

ultralytics

Ultralytics YOLO27, YOLO26, YOLO11, YOLOv8 — object detection, instance segmentation, semantic segmentation, image classification, pose estimation, object tracking

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[Ultralytics](https://www.ultralytics.com/) creates cutting-edge, state-of-the-art (SOTA) [YOLO models](https://www.ultralytics.com/yolo) built on years of foundational research in computer vision and AI. Constantly updated for performance and flexibility, our models are **fast**, **accurate**, and **easy to use**. They excel at [object detection](https://docs.ultralytics.com/tasks/detect), [tracking](https://docs.ultralytics.com/modes/track), [instance segmentation](https://docs.ultralytics.com/tasks/segment), [semantic segmentation](https://docs.ultralytics.com/tasks/semantic), [image classification](https://docs.ultralytics.com/tasks/classify), and [pose estimation](https://docs.ultralytics.com/tasks/pose) tasks. Find detailed documentation in the [Ultralytics Docs](https://docs.ultralytics.com/). Get support via [GitHub Issues](https://github.com/ultralytics/ultralytics/issues/new/choose). Join discussions on [Discord](https://discord.com/invite/ultralytics), [Reddit](https://www.reddit.com/r/ultralytics/), and the [Ultralytics Community Forums](https://community.ultralytics.com/)! Request an Enterprise License for commercial use at [Ultralytics Licensing](https://www.ultralytics.com/license).

## 📄 Documentation See below for quickstart installation and usage examples. For comprehensive guidance on training, validation, prediction, and deployment, refer to our full [Ultralytics Docs](https://docs.ultralytics.com/). Install Install the `ultralytics` package, including all [requirements](https://github.com/ultralytics/ultralytics/blob/main/pyproject.toml), in a [**Python>=3.8**](https://www.python.org/) environment with [**PyTorch>=1.8**](https://pytorch.org/get-started/locally/). [![PyPI - Version](https://img.shields.io/pypi/v/ultralytics?logo=pypi&logoColor=white)](https://pypi.org/project/ultralytics/) [![Ultralytics Downloads](https://static.pepy.tech/badge/ultralytics)](https://clickpy.clickhouse.com/dashboard/ultralytics) [![PyPI - Python Version](https://img.shields.io/pypi/pyversions/ultralytics?logo=python&logoColor=gold)](https://pypi.org/project/ultralytics/) ```bash pip install ultralytics ``` For alternative installation methods, including [Conda](https://anaconda.org/conda-forge/ultralytics), [Docker](https://hub.docker.com/r/ultralytics/ultralytics), and building from source via Git, please consult the [Quickstart Guide](https://docs.ultralytics.com/quickstart). [![Conda Version](https://img.shields.io/conda/vn/conda-forge/ultralytics?logo=condaforge)](https://anaconda.org/conda-forge/ultralytics) [![Docker Image Version](https://img.shields.io/docker/v/ultralytics/ultralytics?sort=semver&logo=docker)](https://hub.docker.com/r/ultralytics/ultralytics) [![Ultralytics Docker Pulls](https://img.shields.io/docker/pulls/ultralytics/ultralytics?logo=docker)](https://hub.docker.com/r/ultralytics/ultralytics) Usage ### CLI You can use Ultralytics YOLO directly from the Command Line Interface (CLI) with the `yolo` command: ```bash # Predict using a pretrained YOLO model (e.g., YOLO26n) on an image yolo predict model=yolo26n.pt source='https://ultralytics.com/images/bus.jpg' ``` The `yolo` command supports various tasks and modes, accepting additional arguments like `imgsz=640`. Explore the YOLO [CLI Docs](https://docs.ultralytics.com/usage/cli) for more examples. ### Python Ultralytics YOLO can also be integrated directly into your Python projects. It accepts the same [configuration arguments](https://docs.ultralytics.com/usage/cfg) as the CLI: ```python from ultralytics import YOLO # Load a pretrained YOLO26n model model = YOLO("yolo26n.pt") # Train the model on the COCO8 dataset for 100 epochs train_results = model.train( data="coco8.yaml", # Path to dataset configuration file epochs=100, # Number of training epochs imgsz=640, # Image size for training device="cpu", # Device to run on (e.g., 'cpu', 0, [0,1,2,3]) ) # Evaluate the model's performance on the validation set metrics = model.val() # Perform object detection on an image results = model("path/to/image.jpg") # Predict on an image results[0].show() # Display results # Export the model to ONNX format for deployment path = model.export(format="onnx") # Returns the path to the exported model ``` Discover more examples in the YOLO [Python Docs](https://docs.ultralytics.com/usage/python). ## ✨ Models Ultralytics supports a wide range of YOLO models, from early versions like [YOLOv3](https://docs.ultralytics.com/models/yolov3) to the latest [YOLO26](https://docs.ultralytics.com/models/yolo26). The tables below showcase YOLO26 models pretrained on [COCO](https://docs.ultralytics.com/datasets/detect/coco) for [Detection](https://docs.ultralytics.com/tasks/detect), [Segmentation](https://docs.ultralytics.com/tasks/segment), and [Pose Estimation](https://docs.ultralytics.com/tasks/pose). [Semantic Segmentation](https://docs.ultralytics.com/tasks/semantic) models are pretrained on [Cityscapes](https://docs.ultralytics.com/datasets/semantic/cityscapes), [Depth Estimation](https://docs.ultralytics.com/tasks/depth) models are pretrained on a broad multi-dataset mix and evaluated on [NYU Depth V2](https://cs.nyu.edu/~silberman/datasets/nyu_depth_v2.html), and [Classification](https://docs.ultralytics.com/tasks/classify) models are pretrained on [ImageNet](https://docs.ultralytics.com/datasets/classify/imagenet). [Tracking](https://docs.ultralytics.com/modes/track) mode is compatible with Detection, Segmentation, Pose, and OBB models. All [Models](https://docs.ultralytics.com/models) download automatically from the latest Ultralytics [release](https://github.com/ultralytics/assets/releases) on first use.

Detection (COCO) Explore the [Detection Docs](https://docs.ultralytics.com/tasks/detect) for usage examples. These models are trained on the [COCO dataset](https://cocodataset.org/), featuring 80 object classes. | Model | size
^(pixels) | mAP^val
50-95 | mAP^{val
50-95(e2e)} | Speed
^{CPU ONNX
(ms)} | Speed
^{T4 TensorRT10
(ms)} | params
^(M) | FLOPs
^(B) | | ---------------------------------------------------------------------- | --------------------------- | -------------------------- | ------------------------------- | ------------------------------------ | ----------------------------------------- | ------------------------ | ----------------------- | | [YOLO26n](https://platform.ultralytics.com/ultralytics/yolo26/yolo26n) | 640 | 40.9 | 40.1 | 38.9 ± 0.7 | 1.7 ± 0.0 | 2.4 | 5.4 | | [YOLO26s](https://platform.ultralytics.com/ultralytics/yolo26/yolo26s) | 640 | 48.6 | 47.8 | 87.2 ± 0.9 | 2.5 ± 0.0 | 9.5 | 20.7 | | [YOLO26m](https://platform.ultralytics.com/ultralytics/yolo26/yolo26m) | 640 | 53.1 | 52.5 | 220.0 ± 1.4 | 4.7 ± 0.1 | 20.4 | 68.2 | | [YOLO26l](https://platform.ultralytics.com/ultralytics/yolo26/yolo26l) | 640 | 55.0 | 54.4 | 286.2 ± 2.0 | 6.2 ± 0.2 | 24.8 | 86.4 | | [YOLO26x](https://platform.ultralytics.com/ultralytics/yolo26/yolo26x) | 640 | 57.5 | 56.9 | 525.8 ± 4.0 | 11.8 ± 0.2 | 55.7 | 193.9 | - **mAP^val** values refer to single-model single-scale performance on the [COCO val2017](https://cocodataset.org/) dataset. See [YOLO Performance Metrics](https://docs.ultralytics.com/guides/yolo-performance-metrics) for details.
Reproduce with `yolo val detect data=coco.yaml device=0` - **Speed** metrics are averaged over COCO val images using an [Amazon EC2 P4d](https://aws.amazon.com/ec2/instance-types/p4/) instance. CPU speeds measured with [ONNX](https://onnx.ai/) export. GPU speeds measured with [TensorRT](https://developer.nvidia.com/tensorrt) export.
Reproduce with `yolo val detect data=coco.yaml batch=1 device=0|cpu` Segmentation (COCO) Refer to the [Segmentation Docs](https://docs.ultralytics.com/tasks/segment) for usage examples. These models are trained on [COCO-Seg](https://docs.ultralytics.com/datasets/segment/coco), including 80 classes. | Model | size
^(pixels) | mAP^{box
50-95(e2e)} | mAP^{mask
50-95(e2e)} | Speed
^{CPU ONNX
(ms)} | Speed
^{T4 TensorRT10
(ms)} | params
^(M) | FLOPs
^(B) | | ------------------------------------------------------------------------------ | --------------------------- | ------------------------------- | -------------------------------- | ------------------------------------ | ----------------------------------------- | ------------------------ | ----------------------- | | [YOLO26n-seg](https://platform.ultralytics.com/ultralytics/yolo26/yolo26n-seg) | 640 | 39.6 | 33.9 | 53.3 ± 0.5 | 2.1 ± 0.0 | 2.7 | 9.1 | | [YOLO26s-seg](https://platform.ultralytics.com/ultralytics/yolo26/yolo26s-seg) | 640 | 47.3 | 40.0 | 118.4 ± 0.9 | 3.3 ± 0.0 | 10.4 | 34.2 | | [YOLO26m-seg](https://platform.ultralytics.com/ultralytics/yolo26/yolo26m-seg) | 640 | 52.5 | 44.1 | 328.2 ± 2.4 | 6.7 ± 0.1 | 23.6 | 121.5 | | [YOLO26l-seg](https://platform.ultralytics.com/ultralytics/yolo26/yolo26l-seg) | 640 | 54.4 | 45.5 | 387.0 ± 3.7 | 8.0 ± 0.1 | 28.0 | 139.8 | | [YOLO26x-seg](https://platform.ultralytics.com/ultralytics/yolo26/yolo26x-seg) | 640 | 56.5 | 47.0 | 787.0 ± 6.8 | 16.4 ± 0.1 | 62.8 | 313.5 | - **mAP^val** values are for single-model single-scale on the [COCO val2017](https://cocodataset.org/) dataset. See [YOLO Performance Metrics](https://docs.ultralytics.com/guides/yolo-performance-metrics) for details.
Reproduce with `yolo val segment data=coco.yaml device=0` - **Speed** metrics are averaged over COCO val images using an [Amazon EC2 P4d](https://aws.amazon.com/ec2/instance-types/p4/) instance. CPU speeds measured with [ONNX](https://onnx.ai/) export. GPU speeds measured with [TensorRT](https://developer.nvidia.com/tensorrt) export.
Reproduce with `yolo val segment data=coco.yaml batch=1 device=0|cpu` Semantic Segmentation (Cityscapes) See the [Semantic Segmentation Docs](https://docs.ultralytics.com/tasks/semantic) for usage examples. These models are trained on [Cityscapes](https://docs.ultralytics.com/datasets/semantic/cityscapes), including 19 classes. | Model | size
^(pixels) | mIoU^val | Speed
^{RTX3090 PyTorch
(ms)} | params
^(M) | FLOPs
^(B) | | ------------------------------------------------------------------------------ | --------------------------- | ------------------ | ------------------------------------------- | ------------------------ | ----------------------- | | [YOLO26n-sem](https://platform.ultralytics.com/ultralytics/yolo26/yolo26n-sem) | 1024 × 2048 | 78.3 | 4.4 ± 0.0 | 1.6 | 22.7 | | [YOLO26s-sem](https://platform.ultralytics.com/ultralytics/yolo26/yolo26s-sem) | 1024 × 2048 | 80.8 | 8.4 ± 0.0 | 6.5 | 88.8

原始来源：https://github.com/ultralytics/ultralytics#readme