APPARATUS FOR CONTROLLING IMAGE CONTRAST AND METHOD THEREOF

摘要

An apparatus and a method for controlling image contrast are disclosed. The apparatus for controlling image contrast according to the present invention is characterized by comprising: a first conversion unit for converting first RGB image data input into first YCbCr image data; a cumulative distribution function calculation unit for calculating a cumulative distribution function using the converted first YCbCr image data; a gradation mapping function determination unit for determining a given gradation mapping function corresponding to the calculated cumulative distribution function; a brightness calculation unit for calculating new brightness information using the gradation mapping function; and a second conversion unit for generating second YCbCr image data to which the calculated brightness information is applied and converting the second YCbCr image data into second RGB image data. [Reference numerals] (110) First conversion unit;(120) Cumulative distribution function calculation unit;(130) Gradation mapping function determination unit;(140) Lookup table management unit;(150) Brightness calculation unit;(160) Second conversion unit