README.md

---
license: gpl-3.0
library_name: coreml
pipeline_tag: zero-shot-object-detection
tags:
  - coreml
  - core-ml
  - ios
  - macos
  - apple
  - on-device
  - yolo
  - open-vocabulary
  - clip
  - zero-shot
  - arxiv:2401.17270
---

# YOLO-World — Core ML

*Open-Vocabulary Detection, 2024*

Open-vocabulary detection. Type any text query. YOLO-World V2-S + CLIP ViT-B/32.

<p><img src="https://huggingface.co/mlboydaisuke/YOLO-World-V2-S-CoreML/resolve/main/media/7f0b0e40ee.png" alt="YOLO-World demo"></p>

Core ML conversion of [AILab-CVC/YOLO-World](https://github.com/AILab-CVC/YOLO-World) for on-device inference on iPhone, iPad and Mac. Converted with `coremltools`; the packages are stateless, so all sequencing and buffering lives in your Swift code.

| | |
|---|---|
| Task | zero shot object detection |
| Upstream | [AILab-CVC/YOLO-World](https://github.com/AILab-CVC/YOLO-World) |
| Packages | 2 |
| Download size | 134 MB |
| Minimum iOS | 17.0 |
| Peak RAM | ~600 MB |

## Files

| File | Size | Compute units | SHA-256 |
|---|---:|---|---|
| `yoloworld_detector.mlpackage.zip` | 23 MB | `all` | `611d299ae74c83f9…` |
| `clip_text_encoder.mlpackage.zip` | 111 MB | `cpuOnly` | `45770a743297e8c2…` |
| **Total** | **134 MB** | | |

`compute_units` is not a suggestion -- it is the configuration the conversion was verified against. Moving a package to a different compute unit can silently change the numerics (FP16 attention overflow) or crash on the GPU.

## Download

```bash
hf download mlboydaisuke/coreml-zoo --include "yoloworld/*" --local-dir ./yoloworld
unzip './yoloworld/yoloworld/*.zip' -d ./yoloworld
```

## Use in Swift

```swift
import CoreML

let config = MLModelConfiguration()
config.computeUnits = .all   // as converted — see the table above

// Unzip the .mlpackage, drop it into your Xcode target and Xcode compiles it
// at build time:
let model = try yoloworld_detector(configuration: config)

// ...or compile a downloaded .mlpackage at runtime:
let compiled = try await MLModel.compileModel(at: mlpackageURL)
let model = try MLModel(contentsOf: compiled, configuration: config)
```

> This model is split into 2 Core ML packages that are driven in sequence from Swift. Load them one at a time, copy the outputs out of the `MLMultiArray` buffers and release each model before loading the next — two large Core ML models resident at once will OOM on an iPhone.

## Demo

- **Sample app** — [`sample_apps/YOLOWorldDemo`](https://github.com/john-rocky/CoreML-Models/tree/master/sample_apps/YOLOWorldDemo), a standalone SwiftUI project.
- **Models Zoo** — this model is downloadable and runnable inside the [Models Zoo app](https://apps.apple.com/app/id6762083207) on the App Store, no build required.

## Conversion

- Pitfalls hit during conversion (FP16 overflow, ANE buffer limits, stride handling): [`docs/coreml_conversion_notes.md`](https://github.com/john-rocky/CoreML-Models/blob/master/docs/coreml_conversion_notes.md)
- Model index: [CoreML-Models](https://github.com/john-rocky/CoreML-Models)

## License

The conversion inherits the upstream license: **GPL-3.0**.

## Credits

- Upstream authors: [AILab-CVC/YOLO-World](https://github.com/AILab-CVC/YOLO-World), 2024
- Core ML conversion: john-rocky (Daisuke Majima)