Digital Prepress Model for Register Error Compensation
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Solution Overview
Problem
Existing methods for compensating geometric errors in offset printing, such as paper deformation and machine-specific inaccuracies, are inefficient and costly as they require extensive use of adjustment devices and additional waste, while prior solutions focus mainly on material and process parameters, neglecting machine-related factors.
Innovation Solution
A method using a mathematical prediction model that accounts for machine, process, and material parameters to calculate and correct job- and machine-specific register inaccuracies and errors before printing, allowing for digital prepress adjustments to minimize geometric distortions without the need for extensive mechanical intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If adjustment devices on the printing press are used to correct geometric errors, then manufacturing precision is improved, but device complexity and time consumption increase
Solution Approach 1:
The patent replaces mechanical adjustment devices with a digital correction approach. A mathematical model predicts geometric errors based on process parameters, and digital image processing algorithms automatically correct the print data before printing. This eliminates the need for complex mechanical coordination of registration devices while achieving the same precision goal.
Solution Approach 2:
The patent performs error correction in advance during the prepress stage. By predicting geometric errors using a mathematical model and correcting the digital print data before printing, the system prevents registration errors from occurring rather than correcting them mechanically after the fact, thereby avoiding complex device coordination.
2Manufacturing precision
If mechanical adjustment devices are used to correct register errors, then manufacturing precision is improved, but loss of time and productivity decrease
Solution Approach 1:
The patent performs error prediction and correction in advance during the digital prepress stage using automated algorithms. This eliminates the need for time-consuming test prints and mechanical adjustments on the printing press, thereby maintaining high printing speeds while achieving accurate registration.
Solution Approach 2:
The patent replaces time-consuming mechanical adjustment procedures with automated digital image processing. The mathematical model predicts errors and the system automatically generates corrected print data, eliminating the iterative process of test printing and mechanical adjustment that reduces productivity.
3Manufacturing precision
If prior art methods compensate for geometry errors after they occur, then manufacturing precision is improved, but loss of substance and expense increase
Solution Approach 1:
The patent predicts geometric errors using a mathematical model based on process parameters and corrects the digital print data before printing begins. This preventive approach eliminates the need to print test sheets to measure and compensate for errors, thereby preventing waste material generation at the source.
Solution Approach 2:
The patent uses a mathematical model that incorporates process parameters to predict geometric errors. This feedback mechanism allows the system to automatically adjust the digital print data based on predicted errors, eliminating the need for physical test prints and waste material generation.
4Manufacturing precision
If prior art methods use transformation rules based on area coverage, then manufacturing precision is improved, but device complexity and parameter measurement difficulty increase
Solution Approach 1:
The patent uses a comprehensive mathematical model that handles multiple types of geometric errors (scaling, skewing, distortion) through unified transformation equations. This universal approach simplifies parameter measurement by providing a consistent framework for quantifying and correcting various error types rather than requiring separate measurement procedures for each error type.
Data Source
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AI summary
The invention relates to a method used for task and machine-oriented register inaccuracy and registration error compensation in a preprinting preceding stage of a printing technology of a printer. The method comprises steps that a mathematical prediction model is established in a computer by aiming at ask and machine-oriented register inaccuracy and registration errors; the mathematical model comprises the influence parameters of the printing technology and the following parameters of the printing technology: the parameters comprise machine parameters, technology parameters, and material parameters; in the computer, by analyzing and processing the measured register errors and the registration errors, the model parameters are quantified; in the computer, by using the established prediction model and the quantified parameters, the task and machine-oriented register inaccuracy and registration errors of color separation are calculated; the separated colors are modified in the computer, and the calculated task and machine-oriented register inaccuracy and registration error are compensated.