RPG-SAM: Reliability-Weighted Prototypes and Geometric Adaptive Threshold Selection for Training-Free One-Shot Polyp Segmentation
RPG-SAM is a training-free one-shot polyp segmentation framework that improves performance by addressing regional and response heterogeneity through reliability-weighted prototype mining, geometric adaptive threshold selection, and iterative boundary refinement, achieving a 5.56% mIoU gain on the Kvasir dataset.