1. A camera for capturing an image of an object in an optical path emanating from the object, comprising: a CCD for capturing the image, the CCD disposed at a distant end of the optical path and having at least four different pixel responses to light emitted from the object; an optical filter for removing energy of a portion of the spectrum of wavelengths between red and NIR, the optical filter disposed in the optical path between the object and the CCD; and a ND filter for attenuating light, the ND filter disposed in the optical path between the object and the CCD; wherein the ND filter allows a first proportion of light transmission in a visible wavelength region, and allows a second proportion of light transmission in a NIR wavelength region, the first proportion of light transmission being lower than the second proportion of light transmission.