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Fine-tuned image classifiers that sort scanned archive pages into eleven content categories, so that each page can be sent to the processing it needs: OCR for printed or typed text, handwriting recognition for manuscripts, table extraction for forms, image extraction for drawings and photographs. They look at the page image only, so the language of the page does not matter. The code, the command line and the HTTP service are in atrium-page-classification [^3]. Every version is a **revision** (branch) of this repository [^1]. They share the eleven categories and differ in their training data and base model: ViT [^2] [^6] [^7], EfficientNetV2 [^8] [^9] [^11] or RegNetY [^12]. The current generation is **`vX.4`**: five base models, retrained on the licence-compatible public dataset [^10]. **Name the revision when you load a model:** `main` still holds `v4.3`, the generation before. Each model was scored on the test partition of its own fold of the dataset (folds 1, 1, 2, 2 and 5; 4,791–4,795 pages each), on 22 October 2026. The five together, averaged, are the code's ensemble (`--best`, and the default of its HTTP service).

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This model is a fine-tuned version of Falconsai/nsfw_image_detection on the imagefolder dataset. It achieves the following results on the evaluation set: - Loss: 0.0000 - Accuracy: 1.0 The following hyperparameters were used during training: - learning_rate: 5e-05 - train_batch_size: 16 - eval_batch_size: 8 - seed: 42 - optimizer: Use OptimizerNames.ADAMW_TORCH with betas=(0.9,0.999) and epsilon=1e-08 and optimizer_args=No additional optimizer arguments - lr_scheduler_type: linear - num_epochs: 4

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*__NOTE__: Unless you are trying to detect imagery generated using older models such as VQGAN+CLIP, please use the updated version of this detector instead.* This model is a proof-of-concept demonstration of using a ViT model to predict whether an artistic image was generated using AI. It was created in October 2022, and as such, the training data did not include any samples generated by Midjourney 5, SDXL, or DALLE-3. It still may be able to correctly identify samples from these more recent models due to being trained on outputs of their predecessors.

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Google didn't publish vit-tiny and vit-small model checkpoints in Hugging Face. I converted the weights from the timm repository. This model is used in the same way as ViT-base.

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Google didn't publish vit-tiny and vit-small model checkpoints in Hugging Face. I converted the weights from the timm repository. This model is used in the same way as ViT-base.

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