Patent ID: 8279346

Claim:
An image processing apparatus for converting moving image data having F frames per unit time into moving image data having 2F sub frames per the unit time, the apparatus comprising: an input unit to input moving image data by frame; a low-pass filter to multiply pixel data of interest and neighbor pixel data of the pixel data of interest in the frame inputted by said input unit by a multiplier coefficient and to add up the results of multiplication, thereby generating a low-frequency sub frame; a high-frequency sub frame generator to extract high frequency component data from the frame inputted by said input unit and to add the high frequency component data to the frame inputted by said input unit, thereby generating a high-frequency sub frame; and an output unit to output the low-frequency sub frame and the high-frequency sub frame, wherein said low-pass filter comprises: (a) a subtracter to subtract a brightness value of the pixel data of interest from a brightness value of the neighbor pixel data; (b) a comparator to compare a result d 1 of subtraction by said subtracter with a previously-set threshold Th equal to or greater than 0; and (c) a selector to, (1) when d 1 ≦Th holds as the result of comparison by said comparator, select a previously-set positive multiplier coefficient V 0 as a multiplier coefficient for multiplication of the neighbor pixel data, and (2) while when d 1 >Th holds as the result of comparison by said comparator, select a positive multiplier coefficient V 1 less than the multiplier coefficient V 0 as the multiplier coefficient for multiplication of the neighbor pixel data, wherein the apparatus further comprises a multiplier to multiply the low-frequency sub frame generated by said low-pass filter by a positive multiplier coefficient less than 1, and to output the result of multiplication as a subject of selection by said output unit, and wherein said high-frequency sub frame generator subtracts the result of multiplication by said multiplier from the frame inputted by said input unit, thereby generating the high-frequency sub frame.