CONF Shamsi_ECCV_2026/IDIAP Multi-hypothesis Test-Time Adaptation to Mitigate Underspecification Shamsi, Afshar Guo, Xiao-Yu Alinejad-Rokny, Hamid Mohammadi, Arash Teney, Damien Abbasnejad, Ehsan EXTERNAL http://publications.idiap.ch/attachments/papers/2026/Shamsi_ECCV_2026.pdf PUBLIC European Conference on Computer Vision 2026 https://arxiv.org/abs/2607.00259 URL