Color Gamut Conversion in Recording Devices
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Solution Overview
Problem
Existing methods for color gamut management in digital image devices are inadequate, leading to color mismatch and hue shift, especially when handling high-luminance and high-saturation colors, and are not suitable for real-time color matching in moving images.
Innovation Solution
A system that includes color gamut conversion control means to convert content data into a user-specified or device-compatible color gamut, using color gamut conversion means within recording, reproduction, and output devices, ensuring reliable and appropriate color gamut compression based on user specifications, device capabilities, and file formats.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If ICC profile method is used for color gamut matching, then color accuracy is improved, but device complexity and processing requirements increase
Solution Approach 1:
The patent extracts the color gamut conversion function from complex ICC profile processing and implements it directly in the imaging device's image processing unit. This allows color space conversion to be performed on captured images before storage, eliminating the need for complex runtime color management processing while maintaining color accuracy across different devices.
Solution Approach 2:
The patent performs color gamut conversion in advance during the image capture and storage phase, rather than waiting for later processing. The image processing unit converts captured images from the imaging device's native color space to a standard color space (such as sRGB or Adobe RGB) before the images are stored, so that color matching is already completed when the images are retrieved and displayed.
2Ease of operation
If sRGB color space is used for color matching, then ease of operation is improved, but color expression range is reduced
Solution Approach 1:
The patent implements dynamic color space selection and conversion capability. The image processing unit can handle multiple color spaces (sRGB, Adobe RGB, and device-specific color spaces) and automatically selects the appropriate color space for conversion based on the target display device's capabilities. This allows the system to maintain simplicity for standard devices while expanding color expression range for devices that support wider gamuts.
3Productivity
If color gamut conversion is performed without considering device capabilities, then processing speed is improved, but color reproduction accuracy deteriorates
Solution Approach 1:
The patent implements a system where the imaging device automatically manages its own color space conversion without requiring external intervention. The image processing unit contains built-in color management functionality that automatically detects the color capabilities of connected display devices and performs appropriate color space conversion, eliminating the need for manual color profile configuration or complex runtime color management processing.
Data Source
AI summary
A recording device includes a color gamut conversion control unit, a color gamut conversion unit, and a recording unit. The color gamut conversion control unit controls a method of converting the color gamut of content data, on the basis of a user-specified condition specified by a user. The color gamut conversion unit converts the color gamut of the content data in accordance with the control of the color gamut conversion control unit. The recording unit records, on a recording medium, the content data, the color gamut of which has been converted by the color gamut conversion unit in accordance with the control of the color gamut conversion control unit, or the content data, the color gamut of which has not been converted by the color gamut conversion unit in accordance with the control of the color gamut conversion control unit.