Patent ID: 9247224
Filing Date: 2016-01-26
CPC Classification: H04N

Claim Text:
1. An image processing device comprising: an acquisition section configured to acquire first image data including a plurality of sets of pixel data, each pixel data set being defined by a plurality of color components; a first conversion section configured to convert, for each pixel data set, the plurality of color components into a set of converted pixel data, each converted pixel data set being defined by a luminance component and a color difference component; a determination section configured to determine whether or not each converted pixel data set has a black character attribute, each converted pixel data set that is determined to have the black character attribute being a set of target pixel data; a filtering section configured to perform a filtering process on a luminance component of each target pixel data set using a first group of filter coefficients and perform the filtering process on the color difference component of the each target pixel data set using a second group of filter coefficients to obtain a set of processed pixel data, the processed pixel data set being defined by the luminance component and the color difference component, the first group of filter coefficients including an enhancement coefficient enhancing a difference in the luminance components between the each target pixel data set and a set of neighboring pixel data corresponding to the each target pixel data set, the second group of filter coefficients excluding any enhancement coefficients whose degrees of enhancements are greater than or equal to a degree of enhancement of the enhancement coefficient included in the first group of filter coefficients; and a second conversion section configured to convert each processed pixel data set into a set of updated pixel data, the updated pixel data set being defined by the plurality of color components.