Human facial images provide the demographic information, such as ethnicity and gender. Conversely, ethnicity and gender also play an important role in face-related applications. Image-based ethnicity identiﬁcation prob- lem is addressed in a machine learning framework. The facial elements marked in Fig 2b can be used to evaluate the aesthetics of the nasal bones in European women, as addressed in the legends of Figures 3a-g. Fig 3a. The woman shown on the left (high-fashion model) has nasal bones shifted toward non-European features on all four counts in Fig 2b.