Not every hand gesture is universal. And sometimes, making what you think is an innocent gesture in one country can land you in hot water somewhere else. Just ask any traveler who's given a thumbs ...

We’ve seen gesture-based remote controls before that rely on Sonar sensors, so it’s interesting to see one that relies strictly on image processing.

An curved arrow pointing right. Many hand gestures in the US are pretty universal. The peace sign, thumbs up, and "devil horns" aren't likely to earn you any strange looks in the States ...

You have to put Elon Musk's gestures in context, because his gestures were not just random, one-offs by a Republican supporter.