Patent ID: 7609879

Claim:
An image-processing device comprising: a likelihood determining unit that determines, based on input image data representing an input image, a likelihood degree that color components of the input image are a halftone image and the likelihood degree determined for the color components is one of a plurality of degrees (n, n−1 . . . 0); a filter unit that includes spatial filter groups provided for the color components of the input image and each of the spatial filter groups includes a plurality of filters set to having different characteristics, the spatial filter groups producing a plurality of component-image data sets from the input image data; an output unit that selects a corresponding color component-image data from each of the spatial filter groups based on the likelihood degree (n, n−1 . . . 0) for the color components to create one component-image data set and outputs the created one component-image data set, wherein: the spatial filter groups generate the plurality of component-image data sets for each one of a plurality of color components in the input image, and the output unit outputs one of the component-image data sets for each of the plurality of color components in the input image, and the likelihood determining unit determines likelihood degrees each for one of the plurality of color components in the input image, and the output unit outputs one of the component-image data sets for each one of the plurality of color components, based on a maximum one of the likelihood degrees determined by the likelihood determining unit; and a correcting unit that corrects a likelihood degree determined by the likelihood determining unit according to a priority set for each of the plurality of color components, and the output unit outputs one of the plurality of component-image data sets for each of the plurality of color components, based on a maximum one of the likelihood degrees determined by the likelihood determining unit and corrected by the correcting unit.