From Pairs to Sequences: Track-Aware Policy Gradients for Keypoint Detection. - Yepeng Liu; Hao Li; Liwen Yang; Fangzhen Li; Xudi Ge; Yuliang Gu; Kuang Gao; Bing Wang; Guang Chen; Hangjun Ye; Yongchao Xu (CoRR, 2026)