JDF Command Segmentation for Hybrid Print Consistency
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Solution Overview
Problem
In hybrid workflow systems that include both offset and digital printers, the interpretation of extended Job Definition Format (JDF) information by different RIP engines can lead to inconsistencies, causing complex format-adjustment processing and differing print output results between devices.
Innovation Solution
An image generation-output control apparatus and method that includes a first and second image processing unit, a job receiver to update initial command information, and a job controller to generate specific image drawing information, ensuring that only processable commands are handled by the appropriate units, thereby maintaining consistency across different printing devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the HWF server extends the JDF information to enable the DFE's RIP engine to interpret it correctly, then the print output consistency between offset and digital printers is improved, but the JDF information becomes too complex causing complex format-adjustment processing
Solution Approach 1:
The patent segments the JDF information processing by dividing it into initial command information (received from server) and specific command information (updated by job receiver). The job receiver updates only the necessary portions of JDF information to make it processable by the second image processing unit, rather than extending the entire JDF information structure. This segmentation reduces complexity while maintaining print output consistency.
Solution Approach 2:
The job receiver acts as an intermediary between the HWF server and the DFE's RIP engine. It receives initial command information from the server, updates it to specific command information that is processable by the second image processing unit, and then passes it along. This intermediary role allows the system to maintain consistency without requiring complex extended JDF information to be transmitted through the entire workflow.
2Adaptability or versatility
If the RIP engine of the DFE interprets the JDF information differently from the RIP engine of the HWF server, then the processing flexibility at the digital printer is improved, but the print output results differ between devices
Solution Approach 1:
The patent applies local quality by making the job receiver update JDF information specifically for the second image processing unit's requirements. The update transforms initial command information into specific command information that is tailored to what the second image processing unit can process, while maintaining the overall structure and intent of the original JDF information. This localized adaptation ensures the digital printer processes data correctly without requiring global changes to the JDF specification.
Data Source
AI summary
An image generation-output control apparatus provided in an image forming apparatus communicable with a server that controls a plurality of processes in an image processing system includes a first image processing unit, a second image processing unit, a job receiver to update an initial command information received from the server to a specific command information, a part of the initial command information updated to the specific command information processable at the second image processing unit and not processable at the first image processing unit, and a job controller to cause the first image processing unit to generate first image drawing information based on output target image information received from the server and the initial command information that is not updated, and further cause the second image processing unit to generate second image drawing information based on the specific command information and the output target image information received from the server.