Printer Cartridge Compressed Color Table Memory Optimization
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Solution Overview
Problem
Current color transformation processes from additive to subtractive color models in printing are unsatisfactory due to dependency on output media formulation, leading to varying representations across different cartridges and ink types, and require large color transform tables that occupy valuable memory space.
Innovation Solution
A memory device on a printer cartridge stores compressed color tables with a losslessly compressed neutral axis and delta nodes, allowing for perceptually lossless compression and flexible customization, optimizing color transformation for specific ink formulations without requiring updates via printer programs or drivers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If large color transform tables are used to achieve accurate color transformation from additive to subtractive color models, then color transformation accuracy is improved, but memory space consumption increases
Solution Approach 1:
The patent segments the color transformation data into a compressed color table stored in cartridge memory and delta tables stored in printer memory. The compressed color table contains only essential color mapping data, while delta tables store correction values. This segmentation allows accurate color transformation while minimizing the memory footprint in the cartridge.
Solution Approach 2:
The patent applies compression algorithms to transform the color table data into a compact format that preserves color transformation accuracy while reducing storage requirements. The compressed data is then supplemented with delta tables that provide correction values, effectively changing the parameter representation from full-precision to compressed-plus-correction format.
2Measurement precision
If color transform tables are updated via printer programs or drivers, then color transformation accuracy for different ink formulations is improved, but device complexity and update requirements increase
Solution Approach 1:
The patent performs preliminary customization by pre-configuring the compressed color table in the cartridge specifically for the cartridge's ink formulation. This eliminates the need for runtime updates or complex driver configurations, as the color transformation data is already optimized for the specific ink type before the cartridge is installed in the printer.
Solution Approach 2:
The cartridge autonomously provides color transformation data tailored to its own ink formulation through the compressed color table and delta tables. This self-service approach eliminates dependency on external update mechanisms, as each cartridge automatically provides the correct color transformation parameters for its specific ink type without requiring printer program updates or driver changes.
3Measurement precision
If color transformation is optimized for specific ink formulations, then output accuracy is improved, but adaptability to different cartridges and ink types decreases
Solution Approach 1:
The patent creates a universal solution where each cartridge independently provides its own customized compressed color table and delta tables. This multi-functionality allows the system to maintain high output accuracy for each specific ink formulation while being compatible with multiple different cartridge types, as each cartridge carries its own optimized transformation data.
Data Source
AI summary
A printer cartridge includes a memory device and at least one compressed color table stored on the memory device. A compressed color table includes a losslessly compressed neutral axis, a number of nodes that correspond to seed color table nodes and a number of delta nodes that correspond to a number of delta tables. The number of delta tables indicate differences between interpolated color table nodes and corresponding actual color table nodes.