Revisiting the Role of Foundation Models in Cell-Level Histopathological Image Analysis under Small-Patch Constraints - Effects of Training Data Scale and Blur Perturbations on CNNs and Vision Transformers. - Hiroki Kagiyama; Toru Nagasaka; Yukari Adachi; Takaaki Tachibana; Ryota Ito; Mitsugu Fujita; Kimihiro Yamashita; Yoshihiro Kakeji (CoRR, 2026)