Pixy Lego is a smart vision sensor you can quickly ''teach'' to find objects. It saves you time by only outputting the object data you're interested in. It connects directly to Lego
wiki:v2:start [Documentation]
Pixy for LEGO Mindstorms - YouTube
Announcing: Pixy2 for Lego Mindstorms – PixyCam
wiki:v2:lego_line_following_demo [Documentation]
Charmed Labs Pixy2 Smart Vision Camera for Lego Mindstorms : Amazon.sg: Toys