Patent attributes
In an image conversion apparatus converts an input image having a process color component and a spot color component, which is represented by density data for colors, into a halftone dot image represented by halftone dot data for colors of process colors, first halftone dot providing means provides the process color component constituting the input image in form of a halftone dot expression using a predetermined halftone dot sort; spot color separating means separates the spot color component constituting the input image into the process colors; second halftone dot providing means provides the spot color component separated into the process colors by said spot color separating means in form of a halftone dot expression using a halftone dot sort different from the halftone dot sort used in said first halftone dot providing means; and halftone dot synthesizing means synthesizes the process color component provided in form of a halftone dot expression obtained in said first halftone dot providing means with the spot color component separated into the process colors and provided in form of a halftone dot expression obtained in said second halftone dot providing means for each color of the process colors.
