Patent ID: 7362471

Claim:
An image-forming controller for an image forming apparatus in which a plurality of image forming sections are arranged in parallel for respective predetermined color components to sequentially form images on a recording medium sequentially passing by the image forming sections, the image-forming controller outputting raster image data for the predetermined color components to the corresponding image forming sections, thereby allowing a multi-color image to be formed, the image-forming controller comprising: raster-rectangle converting means for converting raster image data for a predetermined color-space comprising color components different from the predetermined color components into a plurality of pieces of rectangular image data; storing means for storing the plurality of pieces of rectangular image data converted by the raster-rectangle converting means; a plurality of rectangle-raster converting means, provided for the respective predetermined color components, for converting the plurality of pieces of rectangular image data into raster image data; transferring means for reading identical rectangular image data predetermined multiple times, the identical rectangular image data being stored by the storing means, and for sequentially transferring the read identical rectangular image data to the rectangle-raster converting means; and a plurality of color-space converting means, provided for the respective color components, for converting the raster image data converted by the rectangle-raster converting means into a color-space comprising the predetermined color components to generate respective pieces of raster image data for the predetermined color components and for outputting the pieces of raster image data to the corresponding image forming sections for the predetermined color components.