Inkblots confirm your humanity to the web

摘要

Three animals lurk in the image to the left. Your ability to pick them out might just be proof that you are a living, breathing human.rnSuch proof is highly prized online, where website operators strive to distinguish between human visitors and unwelcome software bots. That distinction has so far been made using distorted patterns of letters, called captchas, which are legible to humans but indecipherable to most bots.