BLOCK NOISE DETECTION DEVICE, BLOCK NOISE REMOVING DEVICE, BLOCK NOISE DETECTION METHOD, DATA RECORDING PROGRAM, AND COMPUTER READABLE RECORDING MEDIUM

摘要

PROBLEM TO BE SOLVED: To suppress a circuit scale small and to precisely detect the position of a boundary of block noise.;SOLUTION: A block noise detection device 10 includes: a pixel value acquisition part 41 which acquires pixel value data 141 comprising a pixel value of a determination target dot and pixel values of dots around the target dot; an adjacent pixel difference value calculation part 42 which calculates a difference between a pixel value of a calculation target dot of the pixel value data 141 and a pixel value of at least one dot adjacent to the calculation target dot in a horizontal direction and calculates a difference between the pixel value of the calculation target dot and a pixel value of one dot adjacent to the calculation target dot in a vertical direction and calculates adjacent pixel difference value data 142 wherein a plurality of sums of absolute values of respective calculated differences are arranged; a filter circuit 44 which filters the adjacent pixel difference value data 142 to calculate a noise intensity P; and a block noise determination part 45 which determines whether or not the determination target dot is a boundary of a block noise by the noise intensity P.;COPYRIGHT: (C)2011,JPO&INPIT