Image Processing Apparatus Color Conversion Table Segmentation
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Solution Overview
Problem
Existing image processing systems face challenges in creating accurate color conversion tables for diverse display apparatuses, particularly those with non-linear device characteristics and limitations in color viewing angle and in-plane non-uniformity, which affect color representation consistency across different devices.
Innovation Solution
An image processing apparatus that acquires type information of the display apparatus, selects appropriate colorimetric images for diagnosis, and creates a multidimensional look-up table (LUT) for color conversion, using a colorimeter to measure and adjust for in-plane non-uniformity and color viewing angle, ensuring accurate color representation across various display types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single color conversion table is used for all display apparatuses, then the device complexity is reduced, but the color representation accuracy deteriorates due to non-linear device characteristics and viewing angle limitations
Solution Approach 1:
The patent segments the color conversion process by creating separate conversion tables for different display apparatus types (e.g., LCD, OLED, projector). Each type-specific table addresses the unique non-linear characteristics and viewing angle properties of that display technology, thereby improving color accuracy without requiring a single overly complex universal table.
Solution Approach 2:
The patent applies local quality by tailoring the color conversion characteristics to match the specific properties of each display apparatus type. Instead of using a uniform conversion approach, the system adjusts the conversion parameters locally for each display type based on its non-linear characteristics, viewing angle limitations, and color gamut properties.
2Measurement precision
If type-specific color conversion tables are created for different display apparatuses, then the color representation accuracy is improved, but the device complexity increases due to multiple conversion tables
Solution Approach 1:
The patent achieves universality by creating a multi-functional color conversion system that can handle multiple display apparatus types through a standardized interface. The system maintains multiple type-specific conversion tables but manages them through a universal selection mechanism that automatically chooses the appropriate table based on the display device type, thereby reducing the operational complexity despite having multiple tables.
Solution Approach 2:
The patent utilizes parameter changes by dynamically selecting different conversion tables based on the display apparatus type parameter. The system changes the conversion parameters (which table to use) based on the detected or specified display type, allowing accurate color conversion for each device without requiring the system to manually manage the complexity of multiple tables.
3Productivity
If color conversion is performed without considering display apparatus characteristics, then the processing speed is maintained, but the color consistency across different devices deteriorates
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing type-specific color conversion tables for different display apparatus types. Instead of performing complex real-time adjustments during color conversion, the system prepares the appropriate conversion table in advance based on the display device type, thereby maintaining fast processing speed while ensuring color consistency across different devices.
Solution Approach 2:
The patent implements feedback by using colorimetric images to characterize the actual display output of different apparatus types. The system measures the displayed colorimetric images, compares them with reference values, and uses this feedback to select or adjust the appropriate conversion table, thereby ensuring color consistency while maintaining efficient processing through automated selection.
Data Source
AI summary
An image processing apparatus includes a type acquiring unit that acquires type information indicating a type of a display apparatus, an image selecting unit that selects a first colorimetric image for performing color conversion on the display apparatus, on the basis of the type information acquired by the type acquiring unit, an image information transmitting unit that transmits information on the first colorimetric image selected by the image selecting unit to the display apparatus, a color information acquiring unit that acquires color information of an image which is displayed on the display apparatus on the basis of the information on the first colorimetric image transmitted by the image information transmitting unit, and a conversion relationship creating unit that creates a conversion relationship for the color of an image to be displayed on the display apparatus, on the basis of the color information acquired by the color information acquiring unit.