Patent ID: 7623164
Filing Date: 2009-11-24
Classification: H04N

Abstract:
1. An image sensing apparatus using an image sensing element which has a plurality of pixels arrayed in horizontal and vertical directions, wherein: the image sensing element includes an effective pixel area which outputs signal of an object image, a first reference pixel area which outputs a first reference signal, and a second reference pixel area which outputs a second reference signal, wherein a pixel in the first reference pixel area is shielded from light and does not have a photoelectric conversion element, and wherein a pixel in the second reference pixel area is shielded from light and has a photo-electric conversion element and outputs a signal including dark current component generated in the photoelectric conversion element, said image sensing apparatus comprising: a first correction unit that corrects signals of the effective pixel area by subtracting the first reference signal from each horizontal line signal of the effective pixel area with respect to each corresponding horizontal line; and a second correction unit that uniformly corrects signals of the entire effective pixel area, which are corrected by said first correction unit, by evenly subtracting a representative value, which is based on the second reference signal, from the signals of the plurality of horizontal lines of the effective pixel area.