Wide Gamut Image Conversion Using Experimentally Determined Parameters
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Solution Overview
Problem
Conventional digital imaging devices fail to properly display wide gamut colors due to their processing methods, which are similar to those for standard sRGB images, resulting in inadequate representation of colors that can be perceived by the human eye.
Innovation Solution
An apparatus and method that extract feature differences between a standard gamut and a wide gamut, set a hue range based on these differences and experimentally determined parameters, and convert images accordingly to enhance color representation, using a feature extraction module, color range setting module, and conversion module.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional digital imaging devices process wide gamut space images using the same method as sRGB images, then the processing is simple and compatible with standard workflows, but the output image cannot properly display the wide gamut of colors
Solution Approach 1:
The patent applies parameter changes by transforming color values from the sRGB color space to the wide gamut space using experimentally determined conversion parameters. This involves changing the color space parameters and applying transformation formulas to accurately represent wide gamut colors while maintaining compatibility with standard processing workflows.
2Reliability
If linear extension formula is used to extend color attributes in wide gamut conversion, then the conversion process is simple and computationally efficient, but the color conversion cannot provide colors that are suitable for the human eye
Solution Approach 1:
The patent replaces the linear extension formula with experimentally determined conversion parameters that better match human color perception. This involves changing the mathematical parameters from simple linear relationships to empirically optimized transformation equations that accurately represent how humans perceive wide gamut colors.
Solution Approach 2:
The patent incorporates feedback by using experimentally determined parameters that were derived from human observer measurements. The conversion process uses these pre-determined parameters that reflect actual human color perception feedback, ensuring that the output colors match what humans actually see rather than relying on theoretical linear extensions.
3Reliability
If wide gamut space is used to represent images, then images with more natural and wider range of colors can be created, but conventional devices cannot properly display these wide gamut colors
Solution Approach 1:
The patent resolves this contradiction by establishing specific conversion parameters that transform wide gamut space colors into displayable formats. The experimentally determined parameters enable conventional devices to properly represent wide gamut colors by changing the color space parameters and applying appropriate transformation equations.
Solution Approach 2:
The patent introduces an intermediary conversion process that acts as a mediator between wide gamut space images and conventional display devices. The color conversion module serves as an intermediary that translates wide gamut colors into a format that conventional devices can display accurately, using experimentally determined transformation parameters.
Data Source
AI summary
An apparatus, method and medium outputting a wide gamut space image in which one or more parameters that are needed to convert an existing color space into a wide gamut space are experimentally determined and then are applied to an image. The apparatus includes a feature extraction module to extract one or more feature differences between a standard gamut and a wide gamut of an image, a color range setting module to set a hue range according to the extracted feature differences and one or more experimentally determined parameters, and a conversion module to convert the image according to the extracted feature differences, the experimentally determined parameters, and the hue range.