Colorimetric Indicator Quantification via Image Capture
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Solution Overview
Problem
Visual evaluation of color changes in colorimetric indicators is difficult and subject to interpretation, leading to potential inaccuracies and safety issues, especially in applications like UV radiation exposure monitoring.
Innovation Solution
A system comprising an image capture device and a processing device that acquires images of colorimetric indicators and compares them to reference data to generate a quantitative output, using color scales like L*a*b* for objective and reliable assessment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If visual evaluation of color change is used, then the system is simple and easy to operate, but the measurement precision and reliability deteriorate due to subjectivity and interpretation variability
Solution Approach 1:
The patent replaces the human visual evaluation system with an automated image capture and processing system. A camera captures images of the colorimetric indicator, and image processing algorithms automatically analyze the color change by comparing captured images to reference data, eliminating subjective human interpretation while maintaining operational simplicity.
Solution Approach 2:
The patent introduces an intermediary processing system between the colorimetric indicator and the final assessment. This intermediary includes image capture devices, image processing algorithms, and reference data comparison mechanisms that objectively translate color changes into quantified measurements, removing the subjectivity inherent in direct visual evaluation.
2Ease of operation
If fixed reference colors are embedded in the measurement device, then visual comparison is facilitated, but the reliability deteriorates due to fading, discoloration, or damage of reference colors over time
Solution Approach 1:
The patent replaces physical fixed reference colors with digital reference data stored in memory. Instead of relying on physical color patches that can fade or damage, the system uses digital copies of reference color information that can be accurately retrieved and compared against captured images, ensuring consistent and reliable reference standards over time.
Solution Approach 2:
The patent substitutes the mechanical/physical reference color system with an electronic/digital reference system. Reference colors are stored as digital data rather than physical materials, allowing for precise, consistent, and indelible reference standards that do not degrade through use, fading, or damage.
3Measurement precision
If image capture with fixed reference colors is used, then quantified assessment is provided, but the measurement precision deteriorates due to variations in incident light, angle, and other conditions
Solution Approach 1:
The patent incorporates feedback mechanisms where the image processing system analyzes not only the colorimetric indicator but also the reference regions captured in the same image. By comparing the actual captured reference colors with stored reference data, the system can detect and compensate for variations in lighting conditions, angle, and other environmental factors, maintaining measurement precision and reliability.
Solution Approach 2:
The patent uses captured reference regions as intermediary elements to mediate between variable capture conditions and the final color assessment. These reference regions serve as internal controls that allow the processing algorithm to normalize and correct for environmental variations, ensuring that the quantified assessment reflects actual color change rather than measurement artifacts.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Provides a reliable and consistent quantification of color changes, reducing the risk of misinterpretation and enabling more accurate decision-making in applications such as UV radiation exposure monitoring.
Implementation Method 1
these dyes can exist in at least two different chemical states, with each form of the dye absorbing light in a particular range of wavelength
Data Source
AI summary
A system (5) for quantifying a colour change in a colorimetric indicator (15), the system (5) comprises an image capture device (22) configured to acquire an image of an object (10) comprising the colorimetric indicator (15); and a processing device (20) configured to compare the acquired image to reference data (30) associated with the colourimetric indicator (15), and generate a quantitative output (28) associated with the acquired image.