Representative-Wavelength Illumination for Object Contrast
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Solution Overview
Problem
Existing methods for selecting illumination light to enhance object visibility rely on individual observers' personal views and trial and error, lacking a systematic approach to determine optimal spectral distribution.
Innovation Solution
A method involving the determination of representative and comparative wavelengths using an xy chromaticity diagram to increase contrast between an object and background, employing a first light source with specific characteristics and a second light source configured to emit these wavelengths, guided by a processor and spectral radiance meter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If individual observers select light for illumination based on personal views and trial and error, then the selection process is flexible and adaptable to personal preferences, but the process is time-consuming and lacks objectivity
Solution Approach 1:
The invention transforms the subjective parameter selection process into an objective one by using measurable parameters: spectral radiance distribution, representative wavelengths, and chromaticity coordinates. The system calculates optimal illumination parameters based on the target object's spectral characteristics rather than relying on individual observers' subjective judgments, thereby eliminating trial-and-error time while maintaining adaptability to different observation needs.
2Ease of manufacture
If conventional illumination methods are used without systematic spectral analysis, then the illumination setup is simple and quick to implement, but the visibility and contrast of the observed object are not optimized
Solution Approach 1:
The system performs preliminary spectral analysis of the target object before illumination is applied. By measuring the object's spectral radiance distribution in advance and calculating its chromaticity coordinates and representative wavelengths, the system determines the optimal illumination spectrum beforehand. This preliminary action enables both simplified implementation (the optimal spectrum is pre-calculated) and optimized visibility (the illumination is tailored to the object's characteristics).
Solution Approach 2:
The invention introduces an intermediary computational system that bridges the gap between simple illumination setup and optimized object visibility. This intermediary process analyzes the target object's spectral characteristics and generates optimal illumination parameters, thereby achieving high measurement precision without requiring complex manual adjustment procedures.
3Adaptability or versatility
If light sources with broad spectral coverage are used, then the illumination can render all colors, but the contrast between specific objects and their background is not maximized
Solution Approach 1:
The invention applies local quality by tailoring the illumination spectrum specifically to the target object's spectral characteristics rather than using uniform broad-spectrum illumination. The system identifies representative wavelengths where the object exhibits maximum spectral radiance and enhances illumination at these specific wavelengths while suppressing other wavelengths. This localized spectral enhancement maximizes contrast for the specific object while maintaining color rendering capability.
4Measurement precision
If systematic spectral analysis is performed to determine optimal illumination wavelengths, then the object visibility and contrast are maximized, but the complexity of the illumination system increases
Solution Approach 1:
The invention segments the continuous spectrum into discrete representative wavelengths based on the target object's spectral radiance distribution. Instead of requiring complex continuous spectral control, the system identifies key wavelength points (representative wavelengths) where illumination should be enhanced. This segmentation approach maintains high object visibility while simplifying the illumination system to control only these specific wavelength bands rather than the entire spectrum.
Data Source
AI summary
A method for illumination of an object to be observed to be observed and the background, the method comprising the steps of: obtaining a relationship between wavelength and spectral radiance of the object while the object and the background are illuminated by a first light source that emits light that has a continuous spectrum in the wavelength range from 380 nanometers and 780 nanometers, and determining a value of representative wavelength that corresponds to a maximum value of the spectral radiance of the object plotted against wavelength or values of representative wavelength that correspond to maximum values of the spectral radiance of the object plotted against wavelength; determining a value or values of comparative wavelength; and illuminating the object and the background with light of the value or values of representative wavelength and light of the value or values of comparative wavelength.