Yi Zhang Chao Zeng 0002 Chenguang Yang 0001 Vision-based Air-writing Character Segmentation and Reproduction. 1048-1051 2023 RICAI https://doi.org/10.1109/RICAI60863.2023.10489517 conf/ricai/2023 db/conf/ricai/ricai2023.html#ZhangZY23