Spectral imaging device, skin analysis system using spectral imaging, and cosmetic recommendation method using spectral imaging

Skin Analysis and Cosmetic Recommendation System Using Polarization-Rotation-Based Spectral Imaging

This technology is a spectral imaging device featuring a first polarizing element, a second polarizing element, and a light transmission control element housed within a main frame that attaches to a user's device. By rotating the second polarizing element, the system captures both cross-polarized and non-polarized images, which are then analyzed by a server-side module to calculate spectral skin metrics.

Previously, accurate skin diagnosis required professional equipment at dermatology clinics, incurring significant time and cost. Portable skin cameras often provided only single-view images, making it difficult to distinguish between subsurface and surface skin data. Furthermore, when polarization directions aligned, image saturation frequently occurred, hindering the capture of clear, high-quality images.

This technology reduces image saturation through the selective rotation of the second polarizing element and the insertion of a light transmission control element. It analyzes skin conditions by distinguishing between skin diseases when polarization is orthogonal and skin tone when it is parallel. Equipped with its own light source and spectral filters, it ensures portability and compatibility across various devices. It can be applied to smartphone-based home beauty diagnostics and personalized cosmetic recommendation platforms, helping users select products that best match their skin tone before purchase, thereby reducing return and exchange costs.

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Key Features:

• A spectral imaging device with a first and second polarizing element arranged within a main frame detachably mounted to a user terminal
• A configuration where the polarization direction relative to the first polarizing element is adjusted by the selective rotation of the second polarizing element
• A light transmission control element positioned in the optical path when the polarization directions of the two polarizing elements are aligned
• A step of recommending the most suitable cosmetic product to the user by determining the spectral similarity between the cosmetic and the skin surface

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This invention was developed with support from the Ministry of Science, ICT and Future Planning for the development of multi-modal fusion endoscopes for molecular diagnosis of cancer tissue.

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