**5.1. The importance and the role of person identification in human-robot interaction**

Person identification is a very important function for robots, which work with humans in the real world [26]. Human identification by robot may enhance the extent of interaction and

**Figure 8.** Block diagram of a human-robot interaction system.

communication with each other, where identifying the user does not only require ID but also many other information such as age, gender, interests/hobbies, and language of each user. Knowing the age of the user will help the robot to choose the tone of voice, where child may prefer childish voice tone instead of the manly voice and vice versa. Calling "Mr, Ms, Sir, Madam" when communicating with a person is based on gender, which is also important. Additionally, identifying the interest/hobby of the user will highly enhance the interaction, since it is not acceptable to discuss boxing with a person whose interest is ballet. In addition, communicating with a person using his/her original language ensures promotion of the interaction**.**
