Tone Reproduction Curve Ink Limit Warning
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Solution Overview
Problem
Aqueous inkjet printers face contamination issues due to excessive ink application, which can exceed printer ink limits, leading to contamination and image quality defects, as user tone reproduction curves (TRCs) can arbitrarily change pixel values beyond the limits defined for drop size and print media type.
Innovation Solution
The method involves analyzing tone reproduction curves to identify if their magnitudes exceed marking material limits, issuing a warning when the summed magnitudes exceed these limits, and allowing policies to manage the creation, assignment, or printing of over-limit TRCs, ensuring ink limits are not exceeded, thereby preventing contamination and image quality issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If user tone reproduction curves arbitrarily change pixel values to enhance image quality, then image quality is improved, but ink application exceeds marking material limits causing contamination
Solution Approach 1:
The system performs preliminary analysis of the tone reproduction curve before printing to calculate the magnitude of ink application increases. By evaluating the TRC parameters in advance and comparing them against predefined limits, the system can prevent excessive ink application that would cause contamination while allowing legitimate image quality enhancements.
Solution Approach 2:
The system provides feedback to the user through warning messages when the calculated ink application magnitude exceeds the marking material limits. This feedback mechanism allows users to be alerted to potential contamination issues and adjust their TRC settings accordingly, maintaining image quality while preventing harmful effects.
2Manufacturing precision
If tone reproduction curves increase marking material application to maintain detail, then image quality is preserved, but printer contamination occurs
Solution Approach 1:
The system calculates the magnitude of marking material application increases by analyzing TRC parameters before the printing process begins. By performing this calculation in advance and comparing it against contamination limits, the system can preserve detail quality when safe while preventing printer contamination when limits would be exceeded.
Solution Approach 2:
The system generates warning feedback to inform users when their tone reproduction curve would cause excessive marking material application. This feedback enables users to adjust their curves to maintain detail preservation within safe ink application limits, preventing contamination of the printer mechanism.
3Object-affected harmful factors
If ink application limits are strictly enforced to prevent contamination, then printer cleanliness is maintained, but image quality enhancement is restricted
Solution Approach 1:
The system performs preliminary evaluation of tone reproduction curves to determine the magnitude of ink application changes. By analyzing TRC parameters before printing and comparing against limits, the system can allow image quality enhancements that stay within safe ink application boundaries while blocking only those that would cause contamination.
Solution Approach 2:
The system provides selective feedback through warning messages that inform users when their image quality enhancement attempts to exceed ink application limits. This feedback mechanism maintains printer cleanliness by preventing contamination while allowing legitimate image quality improvements that remain within safe ink application ranges.
Data Source
AI summary
If elements (curves) of a tone reproduction curve increase application of marking material, the magnitudes of the elements of the tone reproduction curve are summed. If the summed magnitudes of the elements of the tone reproduction curve exceed marking material limits, a warning message is output.