Skin Image Segmentation for Precise Cosmetic Application Control
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Solution Overview
Problem
Existing methods for natural makeup, such as those using high-concealable concealers or additional foundation, struggle to accurately apply cosmetic materials to specific skin areas like age spots or freckles, leading to unnatural boundaries and insufficient concealment.
Innovation Solution
An application control device and method that acquires skin image data, divides it into segments smaller than 200 μm, and calculates the precise application amount of cosmetic material for each area, using a calculation model to ensure natural concealment of brightness differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cosmetic material is applied to specific portions of skin with age spots or freckles, then concealment capability is improved, but application accuracy becomes extremely difficult for general users
Solution Approach 1:
The skin surface is divided into multiple segments smaller than or equal to 200 μm, allowing precise control of cosmetic material application at each segment. This segmentation enables the system to target specific portions with age spots or freckles while maintaining natural boundaries, resolving the contradiction between concealment capability and ease of operation.
Solution Approach 2:
The patent replaces manual mechanical application methods with an ink-jet scheme that automatically deposits cosmetic material based on calculated application amounts for each segment. This substitution eliminates the need for users to manually control application accuracy while maintaining high concealment capability.
2Ease of operation
If cosmetic material is spread thinly to eliminate unnatural boundaries, then natural appearance is improved, but concealing capability becomes insufficient
Solution Approach 1:
The patent applies different application amounts of cosmetic material to different segments based on local skin characteristics. Segments with age spots or freckles receive higher application amounts for sufficient concealment, while surrounding bright regions receive reduced or zero application to maintain natural appearance. This local quality approach resolves the contradiction between natural appearance and concealing capability.
3Reliability
If multiple layers of cosmetic material are applied to age spots for sufficient concealment, then concealing capability is improved, but excessive cosmetic material is applied to surrounding bright regions
Solution Approach 1:
By dividing the skin into segments smaller than or equal to 200 μm, the system can precisely calculate and apply cosmetic material only where needed. This prevents excessive application to surrounding bright regions while ensuring sufficient concealment at targeted areas with age spots or freckles, resolving the contradiction between concealing capability and cosmetic material waste.
Solution Approach 2:
The patent applies cosmetic material partially - only to segments containing age spots or freckles - rather than uniformly across the entire skin area. This partial action approach ensures sufficient concealment where needed while avoiding excessive application and waste in surrounding regions.
Data Source
AI summary
An application control device according to an embodiment of the present invention has an acquisition unit that acquires image data of a skin; a division unit that divides the image data into a plurality of segments each smaller than or equal to 200 μm; and a calculation unit that calculates, from a value of one or a plurality of segments of the image data, an application amount of a cosmetic material to be applied to each portion of the skin.