1. An image processing device comprising: setting means for setting parameters related to system errors assumed in a case where printing is performed by a printing system; simulation image generation means for generating a simulation image in which the system error indicated by the parameter is reflected; image quality evaluation means for evaluating image quality of the simulation image; halftone process generation means for generating halftone processing rules that defines the processing contents of halftone processes used in the printing system based on the simulation image in which the evaluation falls in a target range; parameter acquisition means for acquiring the parameter related to the system error; and image analysis means, as the parameter acquisition means, for acquiring the parameters by analyzing a read image of a characteristic parameter acquisition chart printed by the printing system.