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Читай в оригинале: "First of all, just what is color? When visible rays of light strike an object, the light reflects at the wavelength of each particular color, and our vision recognizes this as the color of the object. In a setting of 0 (zero) lux, in other words an environment of absolutely no light, it is necessary to produce light rays that reflect the color of an object without being bright. Such light rays are called near infrared light rays. But because near infrared light has a completely different composition than visible light, these must be reconstructed as colors close to those that we can see. In other words, in the theory of capturing color at night, an object is irradiated with invisible near infrared rays—not the visible light we normally see. Light reflects back off the object and the colors of this light's various wavelengths are analysed and subsequently reproduced as the colors we can see." www.sharp.co.jp/challenge_en/vol9/index2.html