True, if you are only interested in bees entering and leaving. But as the article says, they are also interested in learning what is inside and for that, vision techniques may not be as useful.<p>Quote from the article: &quot;Although we’ve only just begun distilling the data, we believe it should be possible to determine not just the volume of material added to each cell but also details about the types of material involved (mud, eggs, pollen, and so on).&quot;