Camera Exposure Control via Skin Luminance Estimation
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Solution Overview
Problem
Existing systems for imaging a target fail to effectively adjust exposure and illumination based on skin luminance, leading to issues like white jumping and overexposure, and do not utilize skin color information for optimal imaging conditions.
Innovation Solution
An information processing system that acquires skin color information, estimates luminance information, and controls camera parameters such as exposure and illumination to ensure appropriate imaging conditions, preventing issues like white jumping and overexposure by adjusting parameters before actual imaging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If exposure and illumination are adjusted based on skin color information, then image quality is improved and overexposure is prevented, but system complexity increases due to additional processing steps
Solution Approach 1:
The system performs preliminary estimation of skin luminance from skin color information before actual imaging occurs. This preliminary action allows exposure and illumination parameters to be pre-adjusted based on predicted skin luminance, preventing overexposure and white jumping issues before they occur during actual image capture.
Solution Approach 2:
The system introduces skin color information as an intermediary parameter to estimate skin luminance. Instead of directly measuring luminance, the system uses skin color data as a mediator to infer luminance characteristics, which then guides exposure and illumination adjustments. This intermediary approach enables indirect but effective control of imaging parameters.
2Measurement precision
If luminance information is estimated from skin color information, then exposure control accuracy is improved, but processing time increases
Solution Approach 1:
The system creates a simplified model or copy of luminance information by estimating it from skin color data. Instead of performing complex direct luminance measurements, the system generates an estimated luminance copy that is sufficient for exposure control purposes. This copying approach maintains adequate precision while reducing computational complexity and processing time.
3Reliability
If camera parameters are controlled based on estimated luminance, then white jumping and overexposure are prevented, but adaptability to different imaging scenarios is reduced
Solution Approach 1:
The system applies exposure and illumination control specifically targeted at skin regions based on estimated skin luminance. Rather than uniformly adjusting all imaging parameters for all scenarios, the control is locally optimized for skin areas where white jumping and overexposure are most problematic. This localized approach maintains reliability for skin imaging while preserving flexibility for other imaging needs.
Data Source
AI summary
An information processing system (10) comprises: an acquiring means (110) for acquiring skin color information which is information relating to skin color of a target; an estimating means (120) for estimating luminance information of skin of the target on the basis of the skin color information; and a control means (130) for controlling at least one of camera parameter relating to exposure and illumination (19) when imaging the target on the basis of the luminance information. According to such the information processing system, it is possible to image a target with an appropriate condition.