| 摘要 |
A halftone correction device for an image forming apparatus including an intermediate transfer belt and performing halftone processes includes: a correction unit that performs halftone correction for each of the halftone processes using correction tables corresponding to the halftone processes; a pattern generation unit that generates on the belt halftone patterns based on at least one of the halftone processes; a measurement unit that measures image densities of the generated halftone patterns; an estimation unit that estimates, from the image densities of the halftone patterns, image densities of halftone patterns corresponding to the other ones of the halftone processes, by applying a relational expression as an estimation equation to patches of the halftone patterns having an equal image area ratio; and a table generation unit that generates the correction tables using target values and the image densities of the halftone patterns of the halftone processes. |
