The cameras do not just take pictures and make movies however, as they are what enables Nao with the help of pre-installed algorithms, to understand the area around him. These algorithms detect faces and shapes which means that Nao can not only find objects and other simple tasks, but can also recognise when someone speaks to him and follow the voice to walk towards that person.
In addition to the cameras and algorithms, Nao has also been fitted on the top of his head with a capacitive sensor that has been segmented into 3 unique sections. This enables Nao to reach out in the most appropriate ways to touch. For instance, if you wish to turn off Nao, you tap the sensor once. You can also use it though to register a specific action by using the sensor like a button. The LED lights on the robot light up in a particular order to show the type of contact that has been made and the team behind Nao, Aldebran Robotics, have suggested Nao can be programmed to recognise and follow very intricate and complicated sequences.