VIDEO SIGNAL PROCESSING APPARATUS PERFORMING GAMMA CORRECTION BY CUBIC INTERPOLATION COMPUTATION, AND METHOD THEREOF

摘要

An image signal processing apparatus performing gamma correction by cubic interpolation computation, and a method thereof are provided to prevent the increase of the amount of software processing and the number of setting operations. A section determining unit(26) detects a non-equidistantly section. A correction level maintaining unit(21) maintains a signal level of an image signal after correction about each sample point by a correction level. An interpolative calculation unit(25) executes cubic interpolative calculation with reference to the correction level. A signal level of the image signal after the correction corresponding to the signal level of the inputted image signal is obtained.