English

Phase-Aware Wavelet-Based-Scattering Encoder-Decoder for Dense Predictions

Computer Vision and Pattern Recognition 2026-05-26 v1 Artificial Intelligence Machine Learning

Abstract

Scattering transforms achieve Lipschitz stability and translation invariance, but dense prediction tasks require preserving spatial structure lost in global averaging. We propose Phase-Aware Scattering Encoder-Decoder, which restores this information by explicitly preserving phase in skip connections. On image denoising (BSD68), breaking translation invariance improves PSNR by +2.17+2.17~dB; phase preservation adds +1.03+1.03~dB. A novel spatial shuffling ablation (1.26-1.26~dB penalty) demonstrates phase encodes location-dependent structure. We conduct a preliminary extensibility study on a second dense prediction task (ISIC skin lesion segmentation), with full cross-validation as ongoing work. This work advances principled wavelet-deep learning integration, showing how phase information complements scattering's stability-expressiveness trade-off in pixel-level prediction.

Keywords

Cite

@article{arxiv.2605.24621,
  title  = {Phase-Aware Wavelet-Based-Scattering Encoder-Decoder for Dense Predictions},
  author = {Ghassen Marrakchi and Basarab Matei},
  journal= {arXiv preprint arXiv:2605.24621},
  year   = {2026}
}

Comments

21 pages, 16 figures, 10 tables