IPID

This release contains the images supplied in the WU folders of the local Linear_RGB_Polar RLP collection. Dataset and scene directory names have been changed from WU to IPID, while the original training and test split and PNG contents are preserved.

Structure

train/IPID001/{0,45,90,135}.png
...
test/IPID004/{0,45,90,135}.png
...

Each scene contains four 8-bit RGB PNG images named for polarization angles in degrees: 0, 45, 90, and 135. Images are uploaded without conversion.

Split	Scenes	PNG files	Bytes
train	170	680	881328742
test	7	28	33856651

Scene identifiers range from IPID001 through IPID177. Test scenes are IPID004, IPID017, IPID046, IPID070, IPID085, IPID086, and IPID096; all other scenes belong to the training split.

Image dimensions: 1024 x 1024 (628 images), 1280 x 1280 (20), 1536 x 1536 (32), 1664 x 1664 (4), 1792 x 1792 (16), 2048 x 1536 (4), and 2448 x 2048 (4).

License: CC-BY-4.0.

The accompanying manifest.json records each image's repository path, byte size, and SHA-256 checksum.

Citation

If you use this dataset in your research, please cite:

@article{wu2026deep,
  title={Deep unfolding with learned regularization for color polarization demosaicking},
  author={Wu, Caiyun and Luo, Yidong and Li, Chenggong and Zhang, Junchao and Lianga, Buge},
  journal={Advanced Imaging},
  volume={3},
  number={3},
  year={2026},
  publisher={Science Press}
}