Abstract: The image data processor generates storage layout information and output joint information, and then generates a page raster for storage based on the storage layout information and a page raster for output based on the output joint information. The storage layout information is based on layout information describing object layouts and includes a page formed by the same objects and reusable objects of the same arrangements and a page formed by each variable object. The output joint information combines a page for reusable objects and a page for the variable object.

Abstract: Based on layout information, in regard to a group of reusable objects appearing in a range from a lowermost layer to a layer immediately before a variable object appears in the order of arranging image objects, one new reusable object is generated for each group of pages on which reusable objects constituting the group of reusable objects are identical and have same arrangement positions, the new reusable object generated by merging the reusable objects constituting the group of reusable objects. Also new layout information is generated by replacing description of each of the reusable objects constituting the group of reusable objects in the layout information with description of the new reusable object corresponding to the group of reusable objects.

Abstract: It is judged whether or not impositioning is applied to an image, based on layout information. If the image is the imposed one, layout information (storage layout information) for each page constituting one impositioning and output joint information for impositioning based on the storage layout information are generated. A page raster for each page constituting an imposed image is saved without duplication.

Abstract: It is judged whether or not impositioning is applied to an image, based on layout information. If the image is the imposed one, layout information (storage layout information) for each page constituting one impositioning and output joint information for impositioning based on the storage layout information are generated. A page raster for each page constituting an imposed image is saved without duplication.

Abstract: The image data processor generates storage layout information and output joint information, and then generates a page raster for storage based on the storage layout information and a page raster for output based on the output joint information. The storage layout information is based on layout information describing object layouts and includes a page formed by the same objects and reusable objects of the same arrangements and a page formed by each variable object. The output joint information combines a page for reusable objects and a page for the variable object.

Abstract: A data converter has a data conversion section that converts image group data representing an image group consisting of plural images into plate data, each piece of plate data representing a plate image, and plural pieces of plate images being overlapped each other to represent each of the images in the image group, a data saving section that saves the plate data produced by the data conversion section, a sharing determination section that determines whether plate data saved by the data saving section can be shared or not before the production of the plate data by the data conversion section is completed, and a data sharing section that, if the sharing determination section determines that plate data can be shared, acquires the plate data from the data saving section while preventing the data conversion section from producing plate data.

Abstract: A data converter has a data conversion section that converts image group data representing an image group consisting of plural images into plate data, each piece of plate data representing a plate image, and plural pieces of plate images being overlapped each other to represent each of the images in the image group, a data saving section that saves the plate data produced by the data conversion section, a sharing determination section that determines whether plate data saved by the data saving section can be shared or not before the production of the plate data by the data conversion section is completed, and a data sharing section that, if the sharing determination section determines that plate data can be shared, acquires the plate data from the data saving section while preventing the data conversion section from producing plate data.