Efficient Degradation-agnostic Image Restoration via Channel-Wise Functional Decomposition and Manifold Regularization - Ren, Bin; Li, Yawei; Zheng, Xu; Fu, Yuqian; Paudel, Danda Pani; Liu, Hong; Yang, Ming-Hsuan; Van Gool, Luc; Sebe, Nicu (International Conference on Learning Representations, 2026)