FACE AUTHENTICATION DEVICE, FACE AUTHENTICATION METHOD, AND FACE AUTHENTICATION PROGRAM

摘要

When a human sensor detects a person to be authenticated, an illumination unit acquires environmental illumination intensity measured by an illumination intensity sensor, determines illumination intensity by using illumination intensity conversion information that is information representing illumination intensity according to environmental illumination intensity, and controls illumination intensity of a light source so that it emits light with the determined illumination intensity. In the above, the illumination intensity according to the environmental illumination intensity is determined such that, when the environmental illumination intensity is low, the illumination intensity is low and such that, when the environmental light intensity is high, the illumination intensity is high. A face authentication terminal authenticates the person with illumination made by the illumination unit.