Update model card for medium

README.md

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+---
+base_model: google/siglip2-base-patch16-224
+library_name: onnxruntime
+tags:
+  - onnx
+  - scene-atlas
+  - siglip2
+  - vision-language
+  - image-embedding
+  - text-embedding
+---
+
+# medium (ONNX)
+
+**This is an ONNX export and quantisation of [google/siglip2-base-patch16-224](https://huggingface.co/google/siglip2-base-patch16-224), not an original model.**
+
+All credit for the original model goes to its authors. This repo exists solely to host
+pre-exported ONNX variants for use by [Scene Atlas](https://github.com/jennis0/scene-atlas),
+a tabletop RPG scene management tool.
+
+## Source Model
+
+- **Original:** [google/siglip2-base-patch16-224](https://huggingface.co/google/siglip2-base-patch16-224)
+- **Family:** siglip2
+- **Embedding dimension:** 768
+- **Image size:** 224x224
+
+## Quantisation
+
+| Encoder | Quantisation | Size |
+|---------|-------------|------|
+| Vision | fp16 | 177.4 MB |
+| Text | int8 | 290.6 MB |
+| **Total** | | **468.0 MB** |
+
+## Model Parameters
+
+| Parameter | Value |
+|-----------|-------|
+| `model_family` | `siglip2` |
+| `embedding_dim` | `768` |
+| `image_size` | `224` |
+| `image_mean` | `0.5000, 0.5000, 0.5000` |
+| `image_std` | `0.5000, 0.5000, 0.5000` |
+| `interpolation` | `bilinear` |
+| `resize_mode` | `direct_resize` |
+| `tokenizer_type` | `sentencepiece` |
+| `tokenizer_max_length` | `64` |
+
+## Usage
+
+These models are intended for use with Scene Atlas. The repo contains
+`clip_vision_encoder.onnx`, `clip_text_encoder.onnx`, `manifest.json`,
+and a `tokenizer/` directory — all at the repo root.
+
+```python
+from huggingface_hub import hf_hub_download
+
+# Download encoder files
+hf_hub_download(
+    repo_id="jennis0/scene-atlas-medium",
+    filename="clip_vision_encoder.onnx",
+)
+```
+
+## License
+
+Please refer to the [original model card](https://huggingface.co/google/siglip2-base-patch16-224) for
+licensing information.