Nitpick: the article mentions that the bees are tracked with QR Codes, but I find that hard to believe, given the space constraints. In one photo it looks like it is an ArUco marker.
> The protocol used at Fukushima is automated. Each bee is equipped with a 2-mm-wide QR Code which is read by a camera, activating the opening of the maze.
But yeah, doesn't look like a QR code at all, are there possibly different variations of QR codes? Haven't heard about that myself.
https://en.wikipedia.org/wiki/High_Capacity_Color_Barcode
Haven't seen one in ages.
It’s an old Microsoft standard. I’m pretty sure that MS rolled it up, years ago, so they may not be valid, anymore.
> As users sweep their environment with a smartphone, audio cues allow them to find and center the tag in the phone’s field of view. A shake of the wrist prompts the details contained within the tag to be read out (visually impaired people are often holding a guide dog or cane with their other hand). https://www.technologyreview.com/2019/06/06/135057/these-col...
https://developer.apple.com/documentation/appclip/creating-a...