Biometric Imaging Control Under Variable Ambient Light
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional biometric authentication systems do not adequately consider the impact of ambient light conditions on the quality of biometric images, leading to suboptimal imaging conditions that can compromise authentication accuracy.
Innovation Solution
An information processing apparatus and method that obtain positional relationships, ambient light information, and brightness information to control illumination and imaging apparatuses, adjusting imaging conditions based on these factors to optimize biometric image capture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If biometric authentication is performed without considering ambient light conditions, then the authentication process is simple and fast, but the quality of biometric images deteriorates leading to reduced authentication accuracy
Solution Approach 1:
The system performs preliminary measurements of ambient light intensity and direction before capturing biometric images. This advance preparation allows the control unit to pre-calculate optimal imaging parameters and illumination settings, ensuring high-quality images are captured under varying ambient lighting conditions without adding complexity to the authentication flow itself.
Solution Approach 2:
The control unit continuously monitors ambient light conditions and uses this feedback to dynamically adjust imaging apparatus parameters and illumination apparatus operation. By closing the loop between environmental sensing and system control, the patent maintains authentication accuracy while managing system complexity through intelligent adaptation rather than fixed complex hardware configurations.
2Measurement precision
If illumination apparatus and imaging apparatus are controlled based on ambient light information, then biometric image quality is improved, but the system complexity increases
Solution Approach 1:
The control unit serves multiple functions: it processes ambient light measurements, calculates optimal imaging parameters, controls the imaging apparatus, and manages the illumination apparatus. By making the control unit multi-functional, the patent improves biometric image quality without proportionally increasing system complexity, as one component handles multiple tasks rather than requiring separate dedicated systems for each function.
Solution Approach 2:
The system adjusts imaging parameters such as exposure time, aperture, and gain based on measured ambient light conditions. By changing these parameters dynamically rather than using fixed complex hardware configurations, the patent achieves high image quality while keeping the physical system relatively simple. The complexity is managed through software-based parameter adaptation rather than hardware complexity.
3Reliability
If imaging conditions are optimized based on ambient light and positional information, then authentication reliability is improved, but processing time increases
Solution Approach 1:
The system performs ambient light measurement and imaging parameter calculation in advance, before the actual image capture. This preliminary action eliminates the need for time-consuming real-time adjustments during authentication, as the optimal parameters are already determined based on pre-measured environmental conditions and positional information.
Solution Approach 2:
The control unit continuously monitors ambient light conditions and maintains optimal imaging settings throughout the authentication process. By ensuring imaging conditions are continuously optimized rather than adjusted in discrete steps, the patent achieves high reliability while minimizing processing time delays. The useful action of optimizing imaging parameters continues seamlessly without interrupting the authentication flow.
Data Source
AI summary
An information processing apparatus of this disclosure includes an obtaining unit that obtains a positional relationship between a target of biometric authentication and an imaging apparatus that images the target, ambient light information including at least one of illumination light irradiated to the target by an illumination apparatus and ambient light around the target, and brightness information at the target in an imaged image imaged by the imaging apparatus, and a control unit that controls at least one of the illumination apparatus and the imaging apparatus based on the positional relationship, the ambient light information, and the brightness information.