Wands are an essential part of the Harry Potter universe, but there are many details about these wands that really make very ...

The end result is an isolated point of light representing the tip of the wand, which can be fed into Open CV’s optical flow function to show [Adam] what shape the user was trying to make.

Still, none of these small drawbacks deter my enjoyment of the wand — and by no stretch of the imagination make the toy not worth purchasing. The only reason I harp on the travel lock is because ...

Is it magic? No, it’s a neat hack that uses computer vision to track the wand and recognize when you make the magic gesture. The trick is based on the same technique that Universal Studios use ...