Patent ID: 7706033

Claim:
An image processing device, comprising: an image generating unit configured to generate single-hue image data expressed by a single hue from color image data, which single-hue image data includes at least two records, a first record that represents a first area filled with a first color based on first hue component data in the color image data and a second record that represents a second area filled with a second color based on second hue component data in the color image data, the first and second records defining a boundary line by one of line contact and overlap between the first area and the second area; a density determining unit configured to determine, on a record-by-record basis, a first density of the first area and a second density of the second area in the single-hue image data based on the first hue component data and the second hue component data, respectively, of the color image data; a comparing unit configured to compare the first density with the second density; and a boundary generating unit configured to generate the boundary line with the single hue of a third density different from the first and second densities based on the comparison result by the comparing unit.