Patent ID: 7502142
Filing Date: 2009-03-10
Classification: G06K

Abstract:
1. An image data processing device, comprising: a pixel selecting system that selects a notice pixel from among a plurality of pixels constituting an image, all the plurality of pixels being determined as the notice pixel sequentially; a specified direction inputting system through which a specified direction is input, the specified direction being a direction in which ink ejected on a recording medium would move by a relatively large amount on the recording medium; a color-difference vector calculating system that calculates a color-difference vector indicative of the magnitude and direction of a color-difference between the notice pixel selected by the pixel selecting system and neighboring pixels disposed adjacent to the notice pixel; a directional component calculating system that calculates a directional component which is a component of the color-difference vector in the specified direction; a neighboring total density value calculating system that calculates a total density value which is a sum of the density value of the notice pixel and density values of the neighboring pixels located adjacent to the notice pixel; a density reduction value determining system that determines a density reduction value according to the directional component calculated by the directional component calculating system and the total density value calculated by the neighboring total density value calculating system; and a density value reducing system that reduces the density value of the notice pixel by an amount represented by the density reduction value determined by the density reduction value deciding system.