Patent ID: 8791940

Claim:
An apparatus for compensating for a black level, the apparatus comprising: a black pixel average value extraction unit, operative to determine a black pixel average value of a current frame by averaging black pixel values of the current frame; a luminance value extraction unit, operative to extract a luminance value from an analog gain and concentration time information of an image sensor; a black level extraction unit, connected to the black pixel average value extraction unit and the luminance value extraction unit, operative to calculate a frame weight by using the luminance value and determine a black level value of the current frame by using the frame weight, the black pixel average value, and a black level value of a previous frame; and a black level compensation unit, connected to the black level extraction unit, operative to compensate for valid pixel values of the current frame by using the black level value of the current frame, wherein the luminance value extraction unit is operative to determine the luminance value by multiplying the analog gain by the concentration time information to obtain a resultant value, and dividing the resultant value by a normalization factor.