Spectral Color Editing via Dimensionality Reduction
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Solution Overview
Problem
Conventional spectral image editing systems are difficult for humans to understand and operate, especially when editing 31-dimensional spectral colors, as they require direct modification of multi-dimensional curves, making it challenging to achieve saturated colors and color correction.
Innovation Solution
The system transforms spectral values into lower-dimensional color spaces like HLS or L*a*b* for easier human editing, allowing users to edit colors in a more intuitive manner and enhance saturation by narrowing the wavelength width of spectral values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If spectral colors are directly edited in 31-dimensional space, then color accuracy is improved, but ease of operation deteriorates
Solution Approach 1:
The patent transforms the 31-dimensional spectral color data into a 3-dimensional color space (such as L*a*b* or XYZ) for editing purposes. This dimensionality reduction allows users to edit colors using familiar 3D coordinate systems while maintaining the ability to represent and process the full spectral information, thereby resolving the contradiction between color accuracy and ease of operation.
Solution Approach 2:
The patent introduces an intermediary transformation process between spectral color input and editing operations. By using color matching functions as a mediator, the system converts spectral data into perceptually relevant color spaces for editing, then transforms back to spectral space, making the editing process more intuitive while preserving spectral accuracy.
2Quantity of substance
If spectral colors are expressed in 31 dimensions, then color information completeness is improved, but device complexity increases
Solution Approach 1:
The patent reduces the complexity by projecting 31-dimensional spectral color data onto a 3-dimensional color space for processing and display. This maintains the completeness of color information through mathematical transformation while significantly reducing the computational and operational complexity of the system.
Solution Approach 2:
The patent changes the parameter representation from 31 spectral dimensions to 3 color space dimensions (such as L*, a*, b* or X, Y, Z). This parameter transformation maintains the essential color information while making the data more manageable and the system less complex.
3Ease of operation
If color editing is performed in apparatus-dependent color spaces, then ease of operation is improved, but adaptability deteriorates
Solution Approach 1:
The patent uses universal color spaces (such as CIE L*a*b* or XYZ) that are device-independent and based on human color perception. These color spaces serve as a common intermediary that can represent colors from any input device and be converted to any output device's color space, providing both ease of operation and broad adaptability.
Solution Approach 2:
The patent introduces a device-independent color space as an intermediary between apparatus-dependent color spaces. This mediator enables color editing in a universal framework while maintaining the ability to adapt to different input and output devices through color transformation.
Data Source
AI summary
Disclosed is an apparatus and method for color-editing capable of simply carrying out color-editing spectral values, such as spectral reflectance, spectral transmittance, spectral radiance and spectral radiant intensity. When color-editing a spectral value of spectral image, the spectral color is transformed into a low-dimensional color space easy for the human to handle in an HLS space transforming section and color-editing and color-correction are carried out in the low-dimensional color space in on HLS color-editing section thereby generating a proper spectral value from a transformed low-dimensional color in a spectral-space inverse-transforming section. Also, a spectral color editing section receives a spectral editing instruction signal and transforms a wavelength width of a spectral color peak to a narrow one, thereby improving saturation.