Abstract: For sharing, as a second profile for a second output device, a known first profile for converting input device-dependent image data into first output device-dependent image data by performing a pre-gradation converting process, a color converting process, and a post-gradation converting process on the input device-dependent image data, a differential between a one-dimensional gradation conversion curve of a first color image output device and an inverse conversion curve of a one-dimensional gradation conversion curve of a second color image output device is determined by a differential generator, and then the first profile and a differential table are used as the second profile for the second color image output device.

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: 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: 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: 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: For sharing, as a second profile for a second output device, a known first profile for converting input device-dependent image data into first output device-dependent image data by performing a pre-gradation converting process, a color converting process, and a post-gradation converting process on the input device-dependent image data, a differential between a one-dimensional gradation conversion curve of a first color image output device and an inverse conversion curve of a one-dimensional gradation conversion curve of a second color image output device is determined by a differential generator, and then the first profile and a differential table are used as the second profile for the second color image output device.

Abstract: The present invention enables sharing of a master image. An image data converter of the present invention has: a data acquisition section that acquires master data representing a master component of plural versions of an image that are partially common, which is a component common among the versions, in the first format and variable data representing variable components of the plural versions of the image, which are components differing among the versions, in the first format; a data conversion section that converts the master data and the variable data into master separate-plate data and variable separate-plate data in the second format, respectively; and a data output section that outputs the master separate-plate data and the variable separate-plate data to plural input lines of an image output device.