Built entirely from Lego parts, the Bricasso scanned a pre-pixelated source image and saved it to a Lego Mindstorms EV3 unit. The saved data was then used to produce a mosaic using 1 x 1 bricks.
Robots are super interesting, but you probably shouldn’t start learning about them with a full-sized industrial SCARA arm or anything. Better to learn with something smaller and simpler to understand.