Image Processing Device Color Calibration Space Visualization
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Solution Overview
Problem
Conventional image processing devices struggle for users to identify the range of colors targeted for color calibration based on a specified color in a printing target image, making the calibration process cumbersome.
Innovation Solution
An image processing device with a display, input unit, and storage unit that displays a printing target image and uses a conversion table to differentiate between target and non-target colors in the color calibration space, allowing users to easily identify colors for calibration by displaying them differently based on their inclusion in the color calibration space defined by grid points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If color calibration is performed based on a specified color, then color accuracy is improved, but the user cannot easily identify the range of colors targeted for calibration
Solution Approach 1:
The patent applies color changes by displaying target colors (those included in the color calibration space) and non-target colors (those not included) in different colors or with different visual attributes. This allows users to easily distinguish which colors will be subjected to color calibration based on the specified color, while maintaining accurate color calibration functionality.
2Measurement precision
If the color calibration space is defined using multiple grid points and polyhedra, then color calibration accuracy is improved, but the complexity of identifying the calibration range increases
Solution Approach 1:
The patent uses a conversion table that stores correspondence between input values and output values for multiple grid points in the color space. This conversion table acts as a copied representation of the complex color calibration space defined by polyhedra, allowing the system to efficiently determine whether a given color falls within the calibration range without requiring users to understand the underlying geometric complexity.
3Measurement precision
If all colors in the printing target image are subjected to color calibration, then overall color accuracy is improved, but the processing time and resources increase
Solution Approach 1:
The patent applies local quality by performing color calibration only on target colors that fall within the color calibration space defined by the specified color and its surrounding grid points, rather than calibrating all colors in the printing target image. This selective approach maintains color accuracy for relevant colors while improving processing efficiency.
Data Source
AI summary
In an image processing device a controller is configured to perform: a first display operation; and a second display operation to display at least one of a target color and a non-target color in a manner different from the at least one of the target color and the non-target color in a printing target image displayed by the first display operation. The target color is a color targeted for color calibration and included in a color calibration space. The color calibration space is defined by a predetermined number of first grid points and a plurality of second grid points. The first grid points define a first polyhedron with a minimum volume enclosing the specified color. The second grid points define a plurality of second polyhedra with the minimum volume together with the first grid points. The color calibration space is a space enclosed by the second grid points.