http://www.jimmys-adventures.net/adventure-inc/

Roz in the Monsters Inc. ride at California Adventure?
I was wondering how Roz the Animatronic works. How does she recognize the people who are on the ride? She pointed me out three times. I can’t figure it out.
Disney does have ride sync technology. Where they robots have sensors on them that can read colors and peoples different structures, stuff like that. Thats how turtle talk with crush works, thats probably how she pointed you out. Actually Pixar invented the sensors and shared them with Disney!!! Hope this helps!!!
Adventure Inc. – Secret of the Sand, Part 1 (German)