Patent ID: 7843501
Filing Date: 2010-11-30
Classification: H04N

Abstract:
1. An image sensing apparatus comprising: an image sensor having an effective pixel area and an optical black area provided at least above or below the effective pixel area; a calculation circuit configured to calculate an average value of optical black values, by each vertical line, of the optical black area; a white defect determination circuit configured to determine that there is a white defect in a vertical line of the image sensor if the average value of optical black values of the vertical line calculated by said calculation circuit is equal to or greater than a first threshold value; a correction value calculation circuit configured to calculate a white defect correction value on the basis of the optical black value of the vertical line determined as having a white defect by said white defect determination circuit and optical black values of vertical lines located on the right and left of the vertical line determined as having a white defect; and a white defect correction circuit configured to perform white defect correction by subtracting the white defect correction value from signal values of effective pixels in the vertical line determined as having the white defect in the effective pixel area, wherein said first threshold is determined on the basis of a standard deviation of a normal distribution with regard to the average values of optical black values of respective vertical lines calculated by said calculation circuit.