Chromophore Map Generation via Illuminance Estimation
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Solution Overview
Problem
Existing skincare applications face challenges in providing accurate facial image analysis due to variations in image quality and unknown lighting conditions, making it difficult to generate reliable graphical chromophore maps for skin health assessment.
Innovation Solution
A method and apparatus that estimate the illuminance used in capturing facial images by calculating the correlation of spectral reflectance of the lip region with the absorption curve of hemoglobin, selecting the illuminance with the highest correlation, and generating graphical chromophore maps for subsequent images, thereby ensuring accurate chromophore separation and skin analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If customer-provided images are used for analysis, then convenience and accessibility are improved, but image quality and lighting consistency deteriorate
Solution Approach 1:
The system changes the parameter of illuminance estimation by using spectral reflectance correlation with hemoglobin absorption curves to determine the actual lighting conditions of each image, allowing accurate analysis despite varying customer拍摄 environments
Solution Approach 2:
The patent replaces the mechanical approach of controlling physical lighting conditions (requiring controlled studio environments) with a computational method that estimates and compensates for lighting conditions through spectral analysis of the captured images
2Measurement precision
If controlled studio imaging is used, then image quality and lighting consistency are improved, but customer convenience and accessibility deteriorate
Solution Approach 1:
The system enables self-service by allowing customers to capture images independently in their own environments, with the automated illuminance estimation and chromophore separation algorithms compensating for non-ideal conditions without requiring professional studio equipment or operator intervention
3Measurement precision
If illuminance estimation based on spectral correlation is performed, then chromophore map accuracy is improved, but computational complexity increases
Solution Approach 1:
The system extracts only the essential information needed for illuminance estimation by focusing on the correlation between spectral reflectance in the lip region and hemoglobin absorption curves, isolating the key diagnostic signal from the full spectral data to reduce computational burden
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
This approach allows for the generation of accurate graphical chromophore maps, improving the reliability of skin health assessments by eliminating shading components and providing precise melanin and hemoglobin maps, which are critical for skin tone analysis and disease marker identification.
Implementation Method 1
calculates a correlation of a spectral reflectance of a lip region of a customer with an absorption curve of hemoglobin
Implementation Method 2
correlation of a spectral reflectance of a lip region of a customer with an absorption curve of hemoglobin
Data Source
AI summary
A method, non-transitory computer readable medium and apparatus for generating one or more graphical chromophore maps are disclosed. For example, the method includes receiving a plurality of images from a plurality of different customers, estimating a plurality of different illuminates that were used to capture each one of the plurality of images, calculating a correlation of a spectral reflectance of a lip region of a customer with an absorption curve of hemoglobin for the each one of the plurality of images for each one of the plurality of different illuminates that is estimated, selecting an illuminance of the plurality of different illuminates that provides a highest correlation and generating one or more graphical chromophore maps for subsequently received images of customers using the illuminance that is selected.