Patent ID: 8957997
Filing Date: 2015-02-17
Classification: H04N

Abstract:
1. An image sensor comprising: a storage unit configured to store at least a portion of image data; a homogeneous pixel determination unit configured to determine whether dead pixels exist in homogeneous pixels, in a window of the image data, having the same color characteristic as a center pixel in a window of the image data; and an offset correction processing unit configured to calculate a difference value between the center pixel and homogeneous pixels determined as normal pixels by the homogeneous pixel determination unit, and correct a center pixel value by using the calculated difference value, the homogeneous pixel determination unit determines the homogeneous pixels as dead pixels when pixel values of the homogeneous pixels are lower than a predetermined low-threshold value or higher than a predetermined high-threshold value, where the low-threshold value and the high-threshold value are defined based on the center pixel value, wherein the low-threshold value and the high-threshold value are defined by multiplying the center pixel value by a reference value.