Patent ID: 8723898

Claim:
An image processing apparatus comprising: a brightness detection unit configured to detect image brightness; a delay unit configured to delay a first image signal having a first frame frequency by one frame to generate a second image signal; an interpolation image signal generation unit which configured to, by using the first and second image signals, generate first to (n−1)-th interpolation image signals which are to be interpolated between adjacent two frames of the first image signal for providing a frame frequency n-times higher than the first frame frequency (n is an integer not less than 2); a temporal emphasis unit configured to emphasize a high temporal frequency component of the first image signal using a pair of image signals of the first image signal and the first interpolation image signal, emphasize a high temporal frequency component of the i-th one of the first to (n−2)-th interpolation image signals using a pair of image signals of the i-th interpolation image signal and the (i+1)-th interpolation image signal (i is an integer not less than 1 and not more than n−2), and emphasize the high temporal frequency component of the (n−1)-th interpolation image signal using a pair of image signals of the (n−1)-th interpolation image signal and the second image signal; a memory into which the first image signal and the first to (n−1)-th interpolation image signals with the high temporal frequency component emphasized by the temporal emphasis unit are written and from which the written the first image signal and the first to (n−1)-th interpolation image signals are read at a second frame frequency which is equal to n times the first frame frequency; and a second gain controller configured to adjust an amplitude of the image signal which is read from the memory and has the second frame frequency according to the image brightness detected by the brightness detection unit, wherein the temporal emphasis unit includes: a first gain controller configured to adjust amplitudes of each of the pairs of image signals according to the image brightness detected by the brightness detection unit; a gain coefficient determination unit configured to determine a gain coefficient based on each of the pairs of image signals with the amplitudes adjusted by the first gain controller, the gain coefficient indicating a degree to which the high temporal frequency components of the first image signal and the first to (n−1)-th interpolation image signals are to be emphasized, and a high temporal frequency component generation unit configured to use the gain coefficient determined by the gain coefficient determination unit to generate the high temporal frequency components which are to be individually added to the first image signal and the first to (n−1)-th interpolation image signals.