https://thenextweb.com/neural/2021/02/11/ai-robots-detect-human-touch-analyzing-shadows/
Their ShadowSense system uses an off-the-shelf USB camera to capture the shadows produced by hand gestures on a robot’s skin.
One of the reasons is that full-body touch used to require a massive number of sensors, and was therefore not practical to implement.
off-the-shelf : 기성품의 infer : 추론하다, 암시하다.
