Patent ID: 7864233

Claim:
An image photographing device comprising: a lens unit to focus input light and output incident light toward a filter unit; the filter unit to filter the incident light, the filter unit comprising a first filter region configured to selectively pass through a complementary color of a predetermined color from the incident light, a second filter region configured to limit the incident light to a predetermined visually observable color light, a third filter region configured to pass the incident light in wavelength ranges at least beyond the visually observable color light, and a fourth filter region configured to limit the incident light in an infrared wavelength range; and an image sensor unit to sense an image based on light modified by the filter unit, wherein the image sensor unit uses sensed aspects of light exiting the third filter region and the fourth filter region to calculate the infrared wavelength range of the incident light based upon a difference between the sensed aspects of light exiting the third filter region and the sensed aspects of light exiting the fourth filter region, and wherein the image sensor unit corrects sensed aspects of light exiting at least one of the first filter region, second filter region, and third filter region by eliminating corresponding light aspects of the calculated infrared wavelength range from the sensed aspects of the light respectively exiting the first filter region, the second filter region, and the third filter region.