Patent ID: 9679355
Date: 2017-06-13
CPC Classifications: G06K,G06T,H04N

Claim:
1. An image processing device which sharpens an input image, comprising: an amplitude estimator which acquires a magnification a so that a difference between an adjusted low-resolution pattern data sequence acquired by multiplying a low-resolution pattern data sequence, which is acquired by executing predetermined processing with respect to a high-resolution pattern data sequence, by the magnification a and a pixel data sequence in a local region that is a predetermined range of the input image, which includes a pixel to be processed, is equal to or less than a predetermined value; a similarity calculator which sets a similarity value of the pixel to be processed to be a value indicating that a degree of similarity between the adjusted low-resolution pattern data sequence and the pixel data sequence is higher as the difference between the adjusted low-resolution pattern data sequence and the pixel data sequence is smaller in the local region; a multiplier which multiplies the magnification a and the similarity for each pixel to be processed; an FIR filter which executes FIR filter processing with respect to a multiplication value of the magnification a and the similarity, which is acquired by the multiplier, with a difference pattern data sequence acquired by subtracting the high-resolution pattern data sequence from the low-resolution pattern data sequence as an FIR filter coefficient, and thus the FIR filter acquires high frequency component data ΔD of the pixel to be processed, for each pixel to be processed; and an adder which adds pixel data of the pixel to be processed and the high frequency component data ΔD of the pixel to be processed, which is acquired by the FIR filter, for each pixel to be processed.