| --- |
| license: other |
| license_name: non-commercial-research |
| license_link: https://github.com/WuZongWei6/Pixelization |
| library_name: coreml |
| pipeline_tag: image-to-image |
| tags: |
| - coreml |
| - core-ml |
| - ios |
| - macos |
| - apple |
| - on-device |
| - pixel-art |
| - style-transfer |
| - siggraph-asia-2022 |
| --- |
| |
| # Pixelization — Core ML |
|
|
| *Cell-Controllable Pixel Art, SIGGRAPH Asia 2022* |
|
|
| Turn any photo into pixel art. Aliasing-aware generator + anti-alias refinement. Drag the cell-size slider (2–8) to change pixel block size — the network runs once per photo, the slider only re-snaps the grid. 512×512 input. Non-commercial research use only. |
|
|
| Core ML conversion of [WuZongWei6/Pixelization](https://github.com/WuZongWei6/Pixelization) 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 | image to image | |
| | Upstream | [WuZongWei6/Pixelization](https://github.com/WuZongWei6/Pixelization) | |
| | Packages | 1 | |
| | Download size | 35 MB | |
| | Minimum iOS | 17.0 | |
| | Peak RAM | ~250 MB | |
|
|
| ## Files |
|
|
| | File | Size | Compute units | SHA-256 | |
| |---|---:|---|---| |
| | `Pixelization_512.mlpackage.zip` | 35 MB | `cpuAndNeuralEngine` | `f9eac7e8fa6487a4…` | |
| | **Total** | **35 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 "pixelization/*" --local-dir ./pixelization |
| unzip './pixelization/pixelization/*.zip' -d ./pixelization |
| ``` |
|
|
| ## Use in Swift |
|
|
| ```swift |
| import CoreML |
| |
| let config = MLModelConfiguration() |
| config.computeUnits = .cpuAndNeuralEngine // 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 Pixelization_512(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) |
| ``` |
|
|
| ## Demo |
|
|
| - **Sample app** — [`sample_apps/PixelizationDemo`](https://github.com/john-rocky/CoreML-Models/tree/master/sample_apps/PixelizationDemo), 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 |
|
|
| - Script: [`convert_pixelization.py`](https://github.com/john-rocky/CoreML-Models/blob/master/conversion_scripts/convert_pixelization.py) |
| - 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: **Research use only**. |
| See [https://github.com/WuZongWei6/Pixelization](https://github.com/WuZongWei6/Pixelization). |
|
|
| > Upstream ships no LICENSE file; the paper repo states research use only. |
|
|
| ## Credits |
|
|
| - Upstream authors: [WuZongWei6/Pixelization](https://github.com/WuZongWei6/Pixelization), 2022 |
| - Core ML conversion: john-rocky (Daisuke Majima) |
|
|
