Strip model card to minimal -- full docs live in the GitHub repo
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README.md
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tags:
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- image-classification
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- ai-generated-image-detection
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- lorc
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- dinov3
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pipeline_tag: image-classification
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---
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# mLoRC
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decomposition of the patch tokens against the [CLS] token, and a Low-Rank
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Attention Block on the residual subspace, fine-tuned on the full
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[DDA-Training-Set](https://arxiv.org/abs/2608.20882) (118,287 real/fake
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pairs) with **pair-aware energy augmentation** β a training-time trick that
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randomly rescales each pair's residual-subspace magnitude (simulating
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different image compositions/energy bands) while mathematically guaranteeing
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the real>fake energy ordering *within* every pair is preserved exactly.
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`attn_rank=64`, LoRA `rank=32/Ξ±=32` (folded into the backbone weights below,
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not shipped as a separate adapter).
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## Why pair-aware, not per-sample
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An earlier version of this augmentation drew an independent random scale for
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every image, real and fake alike. That let a real image get scaled down
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while its own paired fake got scaled up in the same batch β a real,
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quantified risk (23.75% instantaneous real/fake energy-inversion rate per
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augmented draw, vs. a 3.80% natural baseline). This checkpoint's training
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draws **one shared scale factor per real/fake pair** instead β proven, not
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just observed, to leave the inversion rate exactly at the 3.80% baseline,
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since scaling both sides of a ratio by the same factor can't flip its sign.
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## Results (full 30,000-image WildFake eval)
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| | Clean BAcc | Clean AUC | Full (transformed) BAcc | Full AUC |
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|---|---|---|---|---|
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| v2 baseline (no aug) | 95.01% | 0.9911 | 91.92% | 0.9739 |
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| **mLoRC** | **96.57%** | **0.9929** | **92.65%** | 0.9723 |
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Biggest gains: real-photo groups that were previously the model's weakest
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point β celebahq (85.4%β94.7% under transforms), ffhq (84.3%β94.4%). Full
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per-generator breakdown, throughput benchmarks, and training details: see
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[Buxt-Codes/AIGI-mLoRC](https://github.com/Buxt-Codes/AIGI-mLoRC) β the code
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that loads this checkpoint lives there, not in this HF repo.
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Known regression: Imagen (Google) under transforms, 91.9%β90.9% β the one
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generator where this trick's real-photo gains don't fully offset a drop in
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raw recall on that specific generator (93.7%β86.1%).
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## Usage
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Clone [Buxt-Codes/AIGI-mLoRC](https://github.com/Buxt-Codes/AIGI-mLoRC), set
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up its `requirements.txt`, then:
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```python
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from mlorc import ModulatedLoRC
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model
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result = model.predict_image("photo.jpg")
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print(result) # {"label": "fake", "p_fake": 0.93, "p_real": 0.07}
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```
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or, for a whole directory of images:
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```bash
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python predict.py --input_dir <path/to/images> --output results.json
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```
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This repo is **private** β pass a token (`from_pretrained(hf_token="hf_...")`
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or set `HF_TOKEN`/run `huggingface-cli login`) to access it. Getting access
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here is the *only* gate: unlike the base DINOv3 checkpoint
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(`facebook/dinov3-vith16plus-pretrain-lvd1689m`, gated with **manual review**
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by Meta), loading this model never touches that repo at all β see `Files`.
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## Files
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- `mlorc-full.pt`
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into its weights (`peft`'s `merge_and_unload()`, verified numerically
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exact before shipping β max output difference vs. the pre-merge model was
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1e-12, pure floating-point noise), plus the Low-Rank Attention Block and
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classifier head.
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- `dinov3_config.json` β DINOv3's architecture metadata (hidden size, layer
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count, etc.) mirrored here, **not its weights**. Together with
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`mlorc-full.pt` this means loading the model never needs access to
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`facebook/dinov3-vith16plus-pretrain-lvd1689m` at all β verified with that
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repo's local cache deliberately removed before loading, output still
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bit-identical. No adapter file, no second HF repo, no Meta gate to clear.
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tags:
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- image-classification
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- ai-generated-image-detection
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- dinov3
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pipeline_tag: image-classification
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---
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# mLoRC
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AI-generated-image detector (DINOv3 ViT-H+/16 + [LoRC](https://arxiv.org/abs/2608.20882)).
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Code, results, and docs: [Buxt-Codes/AIGI-mLoRC](https://github.com/Buxt-Codes/AIGI-mLoRC).
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```python
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from mlorc import ModulatedLoRC
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model = ModulatedLoRC.from_pretrained(hf_token="hf_...")
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model.predict_image("photo.jpg")
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```
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## Files
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- `mlorc-full.pt` β full checkpoint, LoRA merged into the backbone weights.
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- `dinov3_config.json` β DINOv3 architecture config (no weights).
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