1. A method for determining the gender of people based on their facial images, comprising the following steps of: a) training a plurality of first machines for localizing a face and training a plurality of second machines for localizing facial features in the face using first facial images in a facial image database to extract first gender-sensitive features, b) training a learning machine for determining gender using the first gender-sensitive features, c) detecting at least a second face from input images of the people captured by at least a means for capturing images, and localizing the second face using the plurality of first machines, and localizing second facial features using the plurality of second machines based on the localized second face, to extract second gender-sensitive features, and d) determining the gender of the second face based on the second gender-sensitive features using the trained learning machine for determining gender.