Patent ID: 8477221

Claim:
An image sensing system comprising: an image sensor having an image sensing surface; a filter arranged between the image sensing surface and an optical system which forms an image of an object on the image sensing surface; a sensor configured to detect a relative luminance of the object in a band in the vicinity of a cutoff wavelength of the filter relative to an average luminance of the object via the optical system; and a corrector configured to execute color shading correction of the image, sensed by the image sensor, using a color shading correction coefficient determined by the relative luminance detected by the sensor, wherein the sensor includes (a) a bandpass filter configured to pass a component, in the band in the vicinity of the cutoff wavelength of the filter, of light having passed through the optical system, and (b) a first detector configured to detect a luminance of the object in the band in the vicinity of the cutoff wavelength of the filter by detecting the light having passed through the bandpass filter, and wherein the sensor detects the relative luminance based on an output of the first detector.