1. An information processor comprising: an imaging unit configured to image a person; and a controller configured to perform face recognition to a captured image with a first image quality obtained based on an image imaged by the imaging unit, determine whether a behavior of the person has satisfied a predetermined condition, and perform the face recognition to a captured image with a second image quality which is higher than the first image quality obtained based on the image imaged by the imaging unit when it has been determined that the behavior of the person has satisfied the predetermined condition.