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birder-project/
nsfw-predictor

Name: nsfw-predictor
Availability: InStock

birder

pytorch

mit

not-for-all-audiences

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Model Card for CLIP-based NSFW Classifier

A simple MLP intended to run on CLIP embeddings to classify NSFW images.

Trained by LAION-AI and only adapted to suit the Vision Data Curation project.

For more information see: https://github.com/LAION-AI/CLIP-based-NSFW-Detector

Model Details

Model Type: NSFW binary classifier
Input: OpenAI CLIP embeddings (vit_l14_pn_quick_gelu_openai-clip)
Output: A probability score between 0 and 1, where higher values correspond to safer (SFW) content

Original authorship: Adapted from LAION-AI’s CLIP-based-NSFW-Detector

Model Usage

This classifier operates on CLIP image embeddings rather than raw pixels. To run inference with the Birder framework:

# Download the CLIP backbone
python -m birder.tools download-model vit_l14_pn_quick_gelu_openai-clip

# Run prediction on a dataset
python -m birder.scripts.predict \
    -n vit_l14_pn_quick_gelu \
    -t openai-clip \
    --simple-crop \
    --gpu \
    --parallel \
    --batch-size 256 \
    --chunk-size 50000 \
    --amp \
    --amp-dtype bfloat16 \
    --save-logits \
    --suffix optional-dataset-name \
    path/to/dataset

# Can now run the NSFW classifier on the saved logits

Intended Use

Primary use case: Filtering and scoring image embeddings for potentially NSFW content.

Recommended scope: Pre-screening in research, data curation, and large-scale dataset processing.

Not intended for: Deployment as a sole moderation tool, enforcement decisions, or safety-critical applications.

Citation

bibtex

@misc{LAION-AI2022CLIP-based-NSFW-Detector,
  author = {Christoph Schuhmann},
  title = {CLIP-based-NSFW-Detector},
  year = {2022},
  url = {https://github.com/LAION-AI/CLIP-based-NSFW-Detector},
  note = {Accessed: August 22, 2025},
}

birder-project/nsfw-predictor