Region-Specific Color Printing via Local LUT Selection
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Solution Overview
Problem
Conventional color printing systems use uniform look-up tables that fail to account for regional color preferences, leading to color distortion and requiring complex GPS-based location detection and expensive server downloads.
Innovation Solution
A color printing system that stores local characteristic information and uses a printer driver to select and apply region-specific look-up tables for color conversion, allowing for automatic determination and application of color preferences based on geographic location.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a uniform look-up table is used for all regions, then the color correction is consistently applied, but the color preferences of specific regions are not considered
Solution Approach 1:
The patent divides the color correction system into multiple region-specific look-up tables, each tailored to specific geographic areas. The printer driver segments the color conversion process by selecting appropriate LUTs based on the printer's location, enabling region-specific color preferences without requiring a completely complex system redesign.
Solution Approach 2:
The patent pre-creates multiple look-up tables corresponding to different regions and stores them in the printer driver. This preliminary preparation allows the system to quickly select and apply the appropriate color correction table based on the printer's location without requiring complex real-time calculations or data downloads during the printing process.
2Adaptability or versatility
If GPS-based location detection and server downloads are used, then region-specific color preferences can be determined, but the structure becomes complicated and cost increases
Solution Approach 1:
The patent enables the printer driver to automatically determine its own location and select the appropriate look-up table without requiring external GPS services or server downloads. The system serves itself by using built-in location detection capabilities and pre-stored region-specific LUTs, eliminating the need for complex external infrastructure.
Solution Approach 2:
Instead of downloading color conversion data from servers, the patent uses pre-created copies of region-specific look-up tables that are stored locally in the printer driver. This copying approach eliminates the need for continuous server connections and data downloads, simplifying the system structure while maintaining region-specific color reproduction capabilities.
3Manufacturing precision
If manual color measurement for look-up table preparation is performed, then accurate color correction can be achieved, but the process is complicated and inconvenient
Solution Approach 1:
The patent performs the complex color measurement and look-up table creation process in advance during the manufacturing phase. Pre-characterization data is collected and LUTs are generated before the printer reaches the user, eliminating the need for manual color measurement and LUT preparation during deployment or operation.
Solution Approach 2:
The patent uses pre-characterization data and reference measurements to generate look-up tables that can be copied and applied without requiring manual color measurement during normal operation. The original complex measurement process is replicated in advance, allowing accurate color correction to be achieved through simple data copying and application.
Data Source
AI summary
In a color printing system the printer driver automatically obtains local characteristic information, such as countries, cities, languages, etc., stored in the OS of the host computer. The printer driver or the image forming apparatus color-converts the input data into output data, which reflects the color preference of the specific region where the image forming apparatus is installed, by using the look-up table corresponding to the local characteristic information obtained by the printer driver. Accordingly, the color preference of the specific region, in which the image forming apparatus is installed, is set more quickly and easily without requiring a complicated structure. The system includes a host computer to store local characteristic information of a region where an apparatus is installed, a printer driver to store look-up tables according to the local characteristic information, to select a look-up table corresponding to the local characteristic information obtained from the host computer, and to convert input data into output data representing a color corresponding to a color preference of a specific region by using the selected look-up table, and an image forming apparatus which is connected to the host computer so as to receive and print the output data, which is color-converted by the printer driver.