Face Imaging Apparatus Multi-Parameter Synthesis
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Solution Overview
Problem
Existing electronic apparatuses for analyzing facial skin struggle with distinguishing between dark portions and pigmentation due to inadequate light intensity, and they are inconvenient to carry due to their large size and weight, as they require the face to be inserted and have uniform illumination.
Innovation Solution
An electronic apparatus that photographs a user's face multiple times using various parameters to obtain images, extracts and synthesizes face regions to create a uniform brightness image, and transmits this synthesized image for skin analysis, allowing for a smaller and lighter device that does not require the face to be inserted.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the light source intensity is increased to improve skin analysis accuracy, then the brightness of the face image is improved, but image information on specific regions is lost due to overexposure
Solution Approach 1:
The face image is divided into multiple regions (first face region and second face region), and different photographing parameters are applied to each region. Specifically, a first photographing parameter set is used for the first face region and a second photographing parameter set is used for the second face region, allowing optimized illumination and exposure for each region to prevent both underexposure and overexposure.
Solution Approach 2:
Different photographing parameters are applied to different regions of the face based on their specific characteristics. The first face region (typically brighter areas like the forehead and nose) uses one set of parameters while the second face region (typically darker areas like the cheeks and jawline) uses another set, ensuring each region is captured with optimal quality for skin analysis.
2Loss of information
If the light source intensity is decreased to prevent overexposure, then image information is preserved, but it becomes difficult to distinguish between dark portions and pigmentation
Solution Approach 1:
The face is segmented into multiple regions with different illumination requirements. Darker regions receive higher intensity illumination through adjusted photographing parameters, ensuring sufficient brightness to distinguish pigmentation from shadows, while brighter regions use lower intensity to prevent overexposure.
Solution Approach 2:
The photographing parameters are locally optimized for each face region based on its brightness characteristics. Regions that require better visibility of dark features use parameters that enhance contrast and brightness, while regions that are already well-lit use parameters that maintain natural appearance and prevent washout.
3Measurement precision
If the electronic apparatus surrounds the entirety of the user's face to achieve uniform illumination, then skin analysis accuracy is improved, but the device size becomes large and inconvenient to carry
Solution Approach 1:
The patent extracts only the essential components needed for multi-region photographing from a complete surrounding structure. Instead of creating a full enclosure around the face, the apparatus uses strategically positioned light sources and cameras that can capture multiple face regions without requiring a bulky surrounding structure, thus reducing device size and weight.
Solution Approach 2:
The patent transitions from a three-dimensional surrounding structure to a more compact configuration by utilizing spatial arrangement in different dimensions. The light sources and imaging components are positioned to leverage angular and positional relationships rather than requiring physical enclosure, achieving uniform illumination across multiple face regions with a smaller form factor.
Data Source
AI summary
An electronic apparatus for illuminating and photographing a user's face and a control method thereof are provided. The electronic apparatus includes a camera configured to photograph a user's face, a transceiver configured to perform communication with a user terminal, and at least one processor configured to photograph the user's face a plurality of times on the basis of a plurality of photographing parameters to obtain a plurality of images, extract face regions corresponding to each of the plurality of images photographed on the basis of the plurality of photographing parameters, synthesize the extracted user's face regions with each other to create a synthesized image, and control the transceiver to transmit data on the synthesized image to the user terminal for the purpose of skin analysis for the user's face.