Patent ID: 7869019

Claim:
A light source estimating device comprising: light receiving means for receiving visible light and invisible light radiated from a light source, light source estimating means for estimating a type of the light source on the basis of an intensity of the received visible light and an intensity of the received invisible light, wherein the light receiving means includes visible light receiving means having a spectral sensitivity for visible light and receiving the visible light radiated from the light source, ultraviolet light receiving means having a spectral sensitivity for ultraviolet light and receiving ultraviolet light radiated from the light source, and infrared light receiving means having a spectral sensitivity for infrared light and receiving infrared light radiated from the light source, further comprising: first relative intensity calculating means for calculating a relative intensity of the ultraviolet light to the visible light on the basis of the intensity of the received visible light and the intensity of the received ultraviolet light; and second relative intensity calculating means for calculating a relative intensity of the infrared light to the visible light on the basis of the intensity of the received visible light and the intensity of the received infrared light, wherein the light source estimating means estimates the type of the light source on the basis of the relative intensity calculated by the first relative intensity calculating means and the relative intensity calculated by the second relative intensity calculating means.