Lab Visualization Spectrometer for Color Unevenness Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing color unevenness inspection apparatuses struggle to accurately detect and display color information of target objects, particularly due to limitations in representing the full color gamut visible to the human eye and effectively conveying minute color unevenness.
Innovation Solution
A spectrometer system that includes a spectroscopic measurement section for acquiring spectral images, a control section for generating Lab visualization information from these images, and a display section for intuitively presenting this information, allowing for accurate detection and display of color information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If RGB images are used for color inspection, then the device complexity is reduced and ease of operation is improved, but the measurement precision deteriorates because RGB can represent only a portion of the color gamut
Solution Approach 1:
The patent introduces Lab visualization information as an intermediary representation that bridges the spectral image data and human color perception. This intermediary format allows accurate color information to be displayed in a way that is easily understood by users, resolving the contradiction between measurement precision and ease of operation.
Solution Approach 2:
The patent transforms the color representation from RGB space to Lab color space, changing the parameters used for color representation. This parameter transformation enables accurate depiction of the full color gamut while maintaining ease of understanding for users, as Lab values are designed to align with human color perception.
2Measurement precision
If spectral images are converted to L*a*b* images for color unevenness detection, then the measurement precision for color unevenness is improved, but the loss of information increases because color information may be missing
Solution Approach 1:
The patent creates a visual copy of the spectral image in Lab color space that faithfully represents the original color information. By generating Lab visualization information from spectral images, the system preserves all color data while presenting it in a format that maintains measurement precision and prevents information loss.
3Ease of operation
If color difference is calculated from adjacent pixels, then the ease of understanding color unevenness is improved, but the measurement precision deteriorates for minute color differences
Solution Approach 1:
The patent adds a new dimension to color representation by introducing Lab visualization information that maps spectral data to human-perceived color spaces. This dimensional transformation enables both accurate detection of minute color differences and intuitive understanding, as the visualization reflects how humans actually perceive color variations.
Data Source
AI summary
A spectrometer includes a spectroscopic measurement section that performs spectroscopic measurement of a target object and that acquires a spectral image, a display section, and a control section that generates Lab visualization information from the spectral image and that causes the display section to display the Lab visualization information. It is desirable that the Lab visualization information is an L-image obtained by converting L-values into luminance for each pixel, an a-image obtained by converting a-values into luminance for each pixel, or a b-image obtained by converting b-values into luminance for each pixel.