Variable Print Inspection via Hybrid Image-Data Verification
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Solution Overview
Problem
In production printing, inspecting variable printed matter is challenging due to the presence of different variable data in each part, making simple image comparison difficult, and existing technologies like RIP processing are limited to single printing apparatus scenarios, failing to effectively inspect prints from multiple apparatuses.
Innovation Solution
An inspection system comprising a design apparatus that generates correct answer data by reflecting prepress processing information, allowing for accurate inspection of variable print data across multiple printing apparatuses, including in-line and offline configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If simple image comparison is used for inspection, then the inspection process is simple and fast, but it becomes difficult to inspect variable printed matter with different data in each part
Solution Approach 1:
The patent segments variable printed matter into fixed areas (common across all copies) and variable areas (different for each copy). The inspection system separately processes these segments by comparing fixed areas using image comparison and handling variable areas through data verification, thus enabling efficient inspection of variable print data while maintaining inspection speed.
Solution Approach 2:
The patent changes the inspection parameters by switching from pure image comparison to a hybrid approach that combines image comparison for fixed areas with data verification for variable areas. This parameter change allows the system to adapt to variable printed matter while maintaining efficiency through automated data validation.
2Measurement precision
If RIP processing is used to create correct images for inspection, then correct answer data can be generated, but the technology is limited to single printing apparatus scenarios and cannot effectively inspect prints from multiple apparatuses
Solution Approach 1:
The patent creates a universal correct answer data generation system that works across multiple printing apparatuses. By separating the correct answer generation from specific apparatus details and using standardized data structures, the system can generate accurate inspection references for variable printed matter produced by different printing devices, thus achieving both precision and multi-apparatus compatibility.
Solution Approach 2:
The patent introduces an intermediary correct answer data structure that mediates between multiple printing apparatuses and the inspection system. This intermediary layer standardizes the representation of variable printed matter, allowing accurate inspection across different apparatuses without requiring apparatus-specific processing.
3Ease of operation
If variable area is excluded during inspection process, then inspection can be performed, but the solution only works for single printing apparatus and does not support production printing with multiple apparatuses
Solution Approach 1:
The patent segments the inspection process into fixed area inspection (using image comparison) and variable area verification (using data validation). This segmentation allows the system to maintain simplicity for fixed areas while adding multi-apparatus support through automated variable area handling, thus improving versatility without significantly complicating the overall process.
Data Source
AI summary
Provided is an inspection system that can inspect variable printing in production printing with a plurality of apparatuses. This system is the inspection system that includes a design apparatus and an inspection apparatus for production printing. The design unit designs variable print data. The correct answer generation unit generates correct answer data for inspection when the variable print data is created by the design unit. The correct answer change unit acquires the processing information at the time of prepress and reflects it in the correct answer data generated by the correct answer generating unit. The output unit outputs the correct answer data changed by the correct answer change unit. The inspection unit inspects the printed matter based on the correct answer data generated by the design apparatus.