1. A method comprising: detecting and extracting face data corresponding to at least a first candidate face of a first image and a second candidate face of a second image, the first image is associated with a first light intensity and the second image is associated with a second light intensity that is different from the first light intensity; analyzing the face data to determine whether the first candidate face corresponds to a first area in the first image that is substantially the same as a second area of the second candidate face in the second image; and evaluating, via a processor, data associated with the first and second areas to determine whether the first and second candidate faces are valid faces or invalid faces of at least one individual.