Image Processing Apparatus Color Gamut Ratio Adjustment
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Solution Overview
Problem
The challenge lies in ensuring improved visibility of images output from one device, such as a printer, when reproduction parameters optimized for a different device, like a liquid crystal display, are directly applied, as the color gamut variations between devices can result in inappropriate parameter usage.
Innovation Solution
An image processing apparatus adjusts the reproduction parameter based on the ratio of the second color gamut to the first color gamut, using a processor to change the degree of parameter adjustment, thereby optimizing image visibility for the output device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If reproduction parameters optimized for a first device (e.g., liquid crystal display) are directly applied to a second device (e.g., printer), then the processing is simple and fast, but the image visibility and quality deteriorate due to color gamut variations between devices
Solution Approach 1:
The patent adjusts reproduction parameters by calculating the ratio between the color gamuts of the first and second devices. The processor modifies the reproduction parameter based on this ratio to compensate for device-specific color gamut differences, thereby optimizing image visibility for the target device while maintaining efficient processing
Solution Approach 2:
The patent introduces an intermediate processing step that calculates the color gamut ratio between devices. This intermediary calculation serves as a bridge that adapts reproduction parameters from one device to another, enabling parameter transfer without direct device-specific optimization while improving image quality
2Manufacturing precision
If reproduction parameters are adjusted to match the color gamut of the output device, then image visibility improves, but the processing complexity increases
Solution Approach 1:
The patent simplifies the parameter adjustment process by using a single key parameter (reproduction parameter) and adjusting it based on the color gamut ratio. This approach avoids complex multi-parameter optimization while achieving improved image visibility through a straightforward calculation and adjustment mechanism
Solution Approach 2:
The patent focuses adjustment efforts on the specific reproduction parameter that has the greatest impact on image visibility, rather than adjusting all image processing parameters. This localized approach improves image quality where it matters most while minimizing overall processing complexity
Data Source
AI summary
An image processing apparatus includes a processor configured to adjust a reproduction parameter for correcting image visibility by changing a degree by which the reproduction parameter is to be changed from a reference value in accordance with a ratio of a second color gamut to a first color gamut. The first color gamut indicates a range in which an image is expressible by a first device. The second color gamut indicates a range in which an image is expressible by a second device.