IMAGE PROCESSOR, METHOD, PROGRAM, AND RECORDING MEDIUM

PROBLEM TO BE SOLVED: To obtain a high quality of pictures nearly equivalent to those processed on the 10-bit base whereas they are basically processed on the 8-bit base. SOLUTION: A bit extender 35 receives input picture signals of 8 bits. An LPF 51 extracts low frequency components of the inputted picture signals and supplies them to a subtractor 52 and an adder 53. The subtractor 52 subtracts the picture signals of only the low frequency components outputted from the LPF 51 from the picture signals containing all the frequency components, and as the result, outputs the picture signals of only high frequency components from the subtractor 52, thus supplying the picture signals of high frequency components from the subtractor 52 to the adder 53 via a rounding unit 54. The adder 53 adds the supplied picture signals of the low frequency components and those of high frequency components to generate picture signals of all frequency components, and supplies them to a limiter 55. The limiter 55 checks and processes to limit the range of the supplied picture signals within which the picture signals can be handled at following stages. This is applicable to television receivers. COPYRIGHT: (C)2005,JPO&NCIPI