arxivcs.RO2026-06-26
Direct Action-Head Injection of A Grounded 3D Point Unlocks Spatial and Task Generalization
Shiang-Feng Tsai, Jin-Cheng Jhang, Yen-Ling Tai, Jia-Hong Lai, Shih-Yun Wong, KangTung-Hsu, et al.
Vision-Language-Action (VLA) models leverage large-scale vision-language pretraining for flexible robot manipulation, yet at test time they remain brittle along two axes: spatial generalization, when object positions differ from those seen during training, and task generalization…