Digital Proof Calibration via Color Space Transformation
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Solution Overview
Problem
Existing methods for producing test prints suffer from high variability and inaccuracies, leading to unreliable calibration data and reduced reproducibility, which affects the quality and flexibility of the printing process.
Innovation Solution
The method involves transforming print data into the digital printer's color space using conversion tables, applying correction data from automated calibration, considering the measuring device used, and creating a calibration set with tolerances to ensure accurate and reproducible results, with automated validity checks and detailed logging of calibration parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If standard calibration methods are used with digital printers, then calibration can be performed quickly, but the results show high variability and low accuracy
Solution Approach 1:
The patent transforms print data between different color spaces (e.g., from the industrial printing machine's color space to the digital printer's color space) using conversion tables that account for specific printer and paper characteristics. This parameter transformation approach enables accurate color matching across different devices while maintaining reproducibility.
Solution Approach 2:
The system automatically compares measured test print results with expected values, detects deviations, and adjusts calibration parameters accordingly. This closed-loop feedback mechanism continuously optimizes calibration accuracy and compensates for variations in printer state, paper properties, and environmental conditions.
2Manufacturing precision
If conversion tables are adapted for different paper types and printer states, then color accuracy improves, but the complexity of the calibration process increases
Solution Approach 1:
The patent creates a universal calibration framework that handles multiple paper types, printer models, and color spaces through a standardized process. The system automatically selects appropriate conversion tables and calibration parameters based on the specific combination of printer and paper, eliminating the need for manual configuration while maintaining high accuracy.
Solution Approach 2:
The system automatically detects the printer type, paper properties, and optimal calibration parameters without requiring manual intervention. It performs self-calibration by printing test patterns, measuring results, and adjusting conversion tables autonomously, thereby reducing operational complexity while maintaining precision.
3Measurement precision
If multiple calibration parameters and correction data are applied, then print accuracy improves, but the time required for calibration and validation increases
Solution Approach 1:
The system performs preliminary calibration by pre-determining conversion tables and correction data for common printer-paper combinations. These pre-calibrated parameters are stored and automatically applied when the same combination is detected, eliminating the need for time-consuming recalibration while maintaining accuracy.
Solution Approach 2:
The calibration data and conversion tables are continuously validated and updated in the background during normal operation. The system monitors print quality and automatically adjusts parameters without interrupting production, ensuring continuous accuracy without additional calibration time.
Data Source
AI summary
In order to improve a method for producing test prints such that the same results in reproducible test prints in a narrow deviation spectrum at high accuracy with the highest possible print flexibility, the invention provides a method for the production of test prints (proofs) of print data intended for printing on an industrial printing machine on a digital printer, wherein the print data is converted from a color space for any given industrial printing machine into digital proof print data in a color space for any given digital printer, as a function of a given state based on conversion tables, wherein the given state comprises parameters, such as paper type, ink, printing mode, and wherein conversion data is determined and considered during the printing process for a calibration file for the printer based on data compatible with the color space, by means of printing a test image, measuring the same, and comparing the same to a typical printer target image, wherein parameters dependent on a measuring device utilized during the measuring of the test image are considered during the determination of the correction data.