Patent ID: 7978237

Claim:
A method for canceling a fixed pattern noise in an image sensor, the method comprising: calculating second reference fixed pattern noises based on first reference fixed pattern noises operated in a vertical blank section of a (n−1)th frame and stored in a storage device and blank fixed pattern noises output in a vertical blank section of a n-th frame; updating the first reference fixed pattern noises stored in the storage device to the second reference fixed pattern noises; canceling active fixed pattern noises included in combination signals based on the combination signals including the active fixed pattern noises and pixel signals and the second reference fixed pattern noises output from the storage device, in an active section of an (n+1)th frame; and calculating an average value of the combination signals including the active fixed pattern noises and pixel signals in the active section of the (n+1)th frame, in units of rows, wherein n is a natural number greater than 1.