Image Processing Apparatus Conversion Table Generation
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Solution Overview
Problem
Conventional image processing methods for printers require multiple sequential color conversion processes, leading to prolonged processing times when handling PDF files, which can slow down the printing process.
Innovation Solution
An image processing apparatus that groups similar input profiles and generates a conversion table using these profiles, along with output profiles, to directly convert object data from a specific color space to a second color space, eliminating the need for intermediate color spaces and reducing the number of conversion processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple sequential color conversion processes are performed using input-side profile and output-side profile, then color accuracy is maintained, but processing time increases
Solution Approach 1:
The patent pre-calculates and stores conversion data for multiple input-side profiles against the output-side profile in a lookup table during system initialization. This preliminary action allows the system to bypass real-time sequential conversions and directly retrieve pre-computed color conversion results, significantly reducing processing time while maintaining color accuracy
Solution Approach 2:
The patent creates a simplified copy of the color conversion relationship by storing pre-computed conversion data in a lookup table. Instead of performing actual sequential color conversions during printing, the system uses this copied conversion data to directly determine output colors, eliminating the time-consuming conversion process while preserving the essential color transformation relationships
2Adaptability or versatility
If sequential color conversion through multiple color spaces is performed, then comprehensive color management is achieved, but the number of conversion steps increases
Solution Approach 1:
The patent merges multiple color conversion operations into a single lookup table that stores the combined conversion relationships between various input-side profiles and the output-side profile. This consolidation reduces the number of discrete conversion steps from multiple sequential transformations to a single table lookup operation, simplifying the overall conversion process while maintaining comprehensive color management capability
Solution Approach 2:
The lookup table is designed to handle multiple input-side profiles and their corresponding color conversions to the output-side profile within a single data structure. This universal approach allows the system to manage diverse color spaces and profiles through one unified mechanism, eliminating the need for separate conversion processes for each profile combination
Data Source
AI summary
An image processing apparatus specifies j number of input-side profiles from among J number of input-side profiles in a target file which has K number of sets of object data defining color in a specific color space. The J number of input-side profiles are for converting a value in the specific color space to a value in a first color space. A conversion table is generated using one of the j number of input-side profiles and an output-side profile, and for converting a value in the specific color space to a value in the second color space without generating a value in the first color space. The output-side profile is for converting a value in the first color space to a value in the second color space. The apparatus converts k number of sets of object data correlated to one of the j number of input-side profiles using the table.