Method and apparatus for compensating image sensor lens shading

The invention relates to a method and apparatus for compensating the lens shading phenomenon in image sensor. The invention first stores an inputted compensation reference value, identifies a center pixel using digital image signals received sequentially in correspondence to each pixel from a sensor, generates analysis data corresponding to each pixel, generates and stores block compensation values for blocks grouped according to the distance from the center pixel, calculates the distance from a compensation target pixel to the center pixel, calculates a compensation value corresponding to the compensation target pixel using the block compensation value corresponding to the distance, and generates for output correction pixel data by aggregating analysis data and the compensation value corresponding to the compensation target pixel. Thus, the invention allows the maintaining of colors as close as possible to the original through the respective compensation of RGB which takes into consideration the respective characteristics of the color filters and through the respective compensation of gain and level for the disparity in transmissivity according to position.