sen-bridge
Copyright 2026 Nikhil Raghavendra
Licensed under the Apache License, Version 2.0 (see LICENSE).

This product includes software adapted from third-party projects, uses third-party
model weights that it does not redistribute, and builds a dataset from third-party
data. Their licence texts are in licenses/.

CODE
- pytorch-fid (Apache-2.0), Maximilian Seitzer. The FID Inception-v3 block variants in
  sen_bridge/torch.py, the graph in sen_bridge/jax.py and the Frechet distance in
  sen_bridge/fid_core.py are adapted from it. The project ships no NOTICE file.
  https://github.com/mseitzer/pytorch-fid   (licenses/LICENSE-pytorch-fid.txt)
- clean-fid (MIT), Copyright (c) 2021 Gaurav Parmar. The 299x299 bicubic resize in
  sen_bridge/resize.py is adapted from it.
  https://github.com/GaParmar/clean-fid   (licenses/LICENSE-clean-fid.txt)
- PerceptualSimilarity / lpips (BSD-2-Clause), Copyright (c) 2018 Richard Zhang,
  Phillip Isola, Alexei A. Efros, Eli Shechtman, Oliver Wang. The LPIPS computation
  is ported from it.
  https://github.com/richzhang/PerceptualSimilarity   (licenses/LICENSE-lpips.txt)
- torchvision (BSD-3-Clause), Copyright (c) Soumith Chintala 2016. Used as a
  dependency (Inception block and VGG16 definitions); not redistributed.
  (licenses/LICENSE-torchvision.txt)
Each adapted file states its changes from the original in its module docstring.

WEIGHTS (not redistributed; downloaded from their original hosts on first use and
checked against pinned SHA-256 digests)
- FID Inception-v3: the TensorFlow inception-2015-12-05 weights as converted by
  pytorch-fid. Original archive licence: Apache-2.0, Copyright 2015 The TensorFlow
  Authors   (licenses/LICENSE-tensorflow-inception.txt)
- LPIPS v0.1 linear layers (VGG): BSD-2-Clause, distributed in the lpips repository.
- VGG16 ImageNet trunk (torchvision vgg16-397923af): torchvision publishes no
  separate licence for its weights and says its pre-trained models "may have their
  own licenses or terms and conditions derived from the dataset used for training".
  The maintainer has decided to use them; see docs/LICENSES.md.

DATA (the SEN-Bridge dataset, released separately from this code)
- Licence: CC BY 4.0 (licenses/LICENSE-CC-BY-4.0.txt), the licence of its source.
- Derived from SSL4EO-S12 v1.1 (CC BY 4.0), Blumenstiel, Ait Ali Braham, Albrecht,
  Maurogiovanni and Fraccaro, arXiv:2503.00168, which builds on SSL4EO-S12, Wang,
  Ait Ali Braham, Xiong, Liu, Albrecht and Zhu, arXiv:2211.07044.
  https://huggingface.co/datasets/embed2scale/SSL4EO-S12-v1.1
- Contains modified Copernicus Sentinel data 2019-2021 (required notice under the
  Copernicus Sentinel data licence).
- Changes made to the source data: centre-crop and 2x2 averaging to 128x128 at 20 m
  (radar in linear power), 8-bit normalisation, filtering and selection, and added
  metadata. The dataset card lists them in full.