Face Image Processing Using Multi-Scale Ring Filters for Melasma Detection
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Solution Overview
Problem
Existing image processing techniques for retouching face images, such as removing moles and melasma, lack precision in detecting and processing specific skin regions, leading to incomplete or unnatural results.
Innovation Solution
An image processing device and method that acquires a face image, generates parameters in a color space, detects specific image regions using ring filters of different sizes, and performs interpolation processing to set these regions for designated beauty skin retouching, ensuring accurate removal of melasma and moles without affecting characteristic facial features.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional image processing techniques are used to detect and remove moles and melasma, then processing speed is maintained, but detection precision and naturalness of results deteriorate
Solution Approach 1:
The patent divides the skin image into multiple size regions (large, medium, small) and applies different processing strategies to each. Ring filters of different sizes are used to detect moles and melasma at various scales, allowing precise detection without overwhelming computational complexity. This segmentation enables the system to handle different skin features appropriately while maintaining overall processing efficiency.
Solution Approach 2:
The patent introduces a size dimension by creating multiple size versions of the skin image and applying ring filters at different radii. This multi-scale approach transforms a single 2D detection problem into a multi-dimensional analysis, enabling the system to detect skin features of varying sizes more accurately while maintaining computational feasibility through systematic processing.
2Manufacturing precision
If multiple processing steps are applied to ensure natural skin appearance, then aesthetic quality improves, but processing time increases
Solution Approach 1:
The patent performs preliminary detection and classification of skin features (moles, melasma, normal skin) before applying retouching operations. By pre-identifying regions requiring different processing approaches and setting appropriate processing flags, the system avoids unnecessary computations on already acceptable regions, thereby reducing overall processing time while maintaining high aesthetic quality through targeted multi-step processing where needed.
Data Source
AI summary
An image processing device includes an acquirer which acquires a face image and a controller. The controller generates an image depicted by at least one of multiple kinds of parameter making up a color space on a basis of the face image acquired by the acquirer, detects a particular image region in the generated image by setting multiple sizes, and sets the detected image region as a region on which a designated processing is to be performed.