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ultralytics 8.1.21 Add YOLOv8-World-v2 models (#8580)

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Signed-off-by: Glenn Jocher <glenn.jocher@ultralytics.com>
Co-authored-by: Glenn Jocher <glenn.jocher@ultralytics.com>
Co-authored-by: UltralyticsAssistant <web@ultralytics.com>
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docs/en/models/yolo-world.md
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@ -36,21 +36,29 @@ This section details the models available with their specific pre-trained weight
All the YOLOv8-World weights have been directly migrated from the official [YOLO-World](https://github.com/AILab-CVC/YOLO-World) repository, highlighting their excellent contributions.
| Model Type | Pre-trained Weights | Tasks Supported | Inference | Validation | Training | Export |
|---------------|-----------------------------------------------------------------------------------------------------|----------------------------------------|-----------|------------|----------|--------|
| YOLOv8s-world | [yolov8s-world.pt](https://github.com/ultralytics/assets/releases/download/v8.1.0/yolov8s-world.pt) | [Object Detection](../tasks/detect.md) | ✅ | ✅ | ❌ | ❌ |
| YOLOv8m-world | [yolov8m-world.pt](https://github.com/ultralytics/assets/releases/download/v8.1.0/yolov8m-world.pt) | [Object Detection](../tasks/detect.md) | ✅ | ✅ | ❌ | ❌ |
| YOLOv8l-world | [yolov8l-world.pt](https://github.com/ultralytics/assets/releases/download/v8.1.0/yolov8l-world.pt) | [Object Detection](../tasks/detect.md) | ✅ | ✅ | ❌ | ❌ |
| YOLOv8x-world | [yolov8x-world.pt](https://github.com/ultralytics/assets/releases/download/v8.1.0/yolov8x-world.pt) | [Object Detection](../tasks/detect.md) | ✅ | ✅ | ❌ | ❌ |
| Model Type | Pre-trained Weights | Tasks Supported | Inference | Validation | Training | Export |
|-----------------|-------------------------------------------------------------------------------------------------------|----------------------------------------|-----------|------------|----------|--------|
| YOLOv8s-world | [yolov8s-world.pt](https://github.com/ultralytics/assets/releases/download/v8.1.0/yolov8s-world.pt) | [Object Detection](../tasks/detect.md) | ✅ | ✅ | ❌ | ❌ |
| YOLOv8s-worldv2 | [yolov8s-worldv2.pt](https://github.com/ultralytics/assets/releases/download/v8.1.0/yolov8s-worldv2.pt) | [Object Detection](../tasks/detect.md) | ✅ | ✅ | ❌ | ✅ |
| YOLOv8m-world | [yolov8m-world.pt](https://github.com/ultralytics/assets/releases/download/v8.1.0/yolov8m-world.pt) | [Object Detection](../tasks/detect.md) | ✅ | ✅ | ❌ | ❌ |
| YOLOv8m-worldv2 | [yolov8m-worldv2.pt](https://github.com/ultralytics/assets/releases/download/v8.1.0/yolov8m-worldv2.pt) | [Object Detection](../tasks/detect.md) | ✅ | ✅ | ❌ | ✅ |
| YOLOv8l-world | [yolov8l-world.pt](https://github.com/ultralytics/assets/releases/download/v8.1.0/yolov8l-world.pt) | [Object Detection](../tasks/detect.md) | ✅ | ✅ | ❌ | ❌ |
| YOLOv8l-worldv2 | [yolov8l-worldv2.pt](https://github.com/ultralytics/assets/releases/download/v8.1.0/yolov8l-worldv2.pt) | [Object Detection](../tasks/detect.md) | ✅ | ✅ | ❌ | ✅ |
| YOLOv8x-world | [yolov8x-world.pt](https://github.com/ultralytics/assets/releases/download/v8.1.0/yolov8x-world.pt) | [Object Detection](../tasks/detect.md) | ✅ | ✅ | ❌ | ❌ |
| YOLOv8x-worldv2 | [yolov8x-worldv2.pt](https://github.com/ultralytics/assets/releases/download/v8.1.0/yolov8x-worldv2.pt) | [Object Detection](../tasks/detect.md) | ✅ | ✅ | ❌ | ✅ |
## Zero-shot Transfer on COCO Dataset
| Model Type | mAP | mAP50 | mAP75 |
|---------------|------|-------|-------|
| yolov8s-world | 37.4 | 52.0 | 40.6 |
| yolov8m-world | 42.0 | 57.0 | 45.6 |
| yolov8l-world | 45.7 | 61.3 | 49.8 |
| yolov8x-world | 47.0 | 63.0 | 51.2 |
| Model Type | mAP | mAP50 | mAP75 |
|-----------------|------|-------|-------|
| yolov8s-world | 37.4 | 52.0 | 40.6 |
| yolov8s-worldv2 | 37.7 | 52.2 | 41.0 |
| yolov8m-world | 42.0 | 57.0 | 45.6 |
| yolov8m-worldv2 | 43.0 | 58.4 | 46.8 |
| yolov8l-world | 45.7 | 61.3 | 49.8 |
| yolov8l-worldv2 | 45.8 | 61.3 | 49.8 |
| yolov8x-world | 47.0 | 63.0 | 51.2 |
| yolov8x-worldv2 | 47.1 | 62.8 | 51.4 |
## Usage Examples