Adaptive Binarization Pattern Selection for Multi-Pass Printing
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Solution Overview
Problem
In multi-pass printing systems, changing the feeding amount between scans can lead to variations in dot arrangements and dot forming orders across unit areas, resulting in deteriorated image quality due to the use of fixed-size binarization patterns that do not adapt to different conveying distances.
Innovation Solution
A data generation apparatus and method that selects a binarization pattern with a specific number of pixels corresponding to the conveying amount, ensuring the repetition cycle for binary data generation is consistent across all unit areas, by using a setting part to determine the printing mode and a generation part to generate binary data using the appropriate binarization pattern.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a fixed-size binarization pattern is used for multi-pass printing, then the printing process is simple and consistent, but the dot arrangements and forming orders vary across unit areas when feeding amount changes, deteriorating image quality
Solution Approach 1:
The binarization pattern size is made dynamic and adaptable to different feeding amounts. The system selects binarization patterns from multiple predetermined patterns with different sizes, where the selection criterion is based on the actual feeding amount. This allows the binarization pattern to adapt to varying conveying distances between scans, ensuring consistent dot arrangements and forming orders across all unit areas regardless of feeding amount changes.
2Manufacturing precision
If the binarization pattern size is changed to adapt to different feeding amounts, then image quality is maintained, but the system complexity increases due to multiple pattern selection
Solution Approach 1:
Multiple binarization patterns with different sizes are predetermined and prepared in advance. The system stores these patterns and selects the appropriate one based on the feeding amount before printing begins. This preliminary preparation eliminates the need for complex real-time pattern generation or adjustment, simplifying the overall system while maintaining image quality.
3Manufacturing precision
If multiple binarization patterns with different sizes are prepared, then consistent dot arrangements can be achieved across unit areas with varying feeding amounts, but the data processing complexity increases
Solution Approach 1:
The system changes the parameter of binarization pattern size based on the feeding amount. By establishing a clear selection criterion (feeding amount) and corresponding pattern sizes, the system achieves consistent dot arrangements across unit areas. The selection process uses straightforward parameter matching rather than complex algorithms, keeping data processing efficient.
Data Source
AI summary
When a feeding amount for multi-pass printing is changed, the purpose related to an image quality using a binary data generation pattern can still be attained by, for example, a density pattern method. Specifically, a multi-pass printing mode is identified, and a density pattern selection matrix associated with a cycle of binary data generation is selected in accordance with the selected printing mode. That is, a density pattern selection matrix employed for binary data generation using a density pattern is changed to a size corresponding to the feeding amount designated by the selected printing mode. Thereby, a phenomenon that a unit used for image processing to gain a predetermined purpose related to an image quality does not match a unit area used for a printing operation is avoided, and an image printing purpose using a binary data generation pattern can be appropriately attained.