DarthReca / CLOSP-Visual

CLOSP

CLOSP (Contrastive Language Optical SAR Pretraining) is a multimodal architecture designed for text-to-image retrieval. It creates a unified embedding space for text, Sentinel-2 (MSI), and Sentinel-1 (SAR) data.

This repository contains all the separate visual encoders in PyTorch format.

Model Details

The model uses three separate encoders: one for text, one for Sentinel-1 (SAR) data, and one for Sentinel-2 (MSI) data. During training, it uses a contrastive objective to align the textual embeddings with the corresponding visual embeddings (either SAR or MSI).

• Developed by: Daniele Rege Cambrin
• Model type: CLOSP
• Language(s) (NLP): english
• License: OpenRAIL
• Repository: GitHub
• Paper: ArXiv

Citation

@misc{cambrin2025texttoremotesensingimageretrievalrgbsources,
      title={Text-to-Remote-Sensing-Image Retrieval beyond RGB Sources}, 
      author={Daniele Rege Cambrin and Lorenzo Vaiani and Giuseppe Gallipoli and Luca Cagliero and Paolo Garza},
      year={2025},
      eprint={2507.10403},
      archivePrefix={arXiv},
      primaryClass={cs.CV},
      url={https://arxiv.org/abs/2507.10403}, 
}