arXiv Computer Vision By Linhao Li, Zhaojie Pan, Langkun Chen

LaST-SR: Laplace-Inspired Steady-Transient Complex-Frequency Decomposition for Single Image Super-Resolution

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LaST‑SR introduces a Laplace‑inspired steady‑transient complex‑frequency decomposition for single‑image super‑resolution. The method couples a global full‑spectrum Fourier branch with a window‑conditioned local complex‑frequency branch, and fuses them via a Steady‑Transient Collaborative Aggregation module. Experiments on five benchmarks demonstrate that LaST‑SR achieves the highest PSNR/SSIM for ×2 and ×4 upscaling, with ablation studies confirming the effectiveness of its architecture.

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