Mobile Camera Exposure Adjustment for Eyeprint Recognition
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Solution Overview
Problem
Existing mobile terminal camera systems struggle with self-adaptive exposure adjustments, leading to discarded frames during eyeprint recognition, which prolongs unlocking time and inconveniences users.
Innovation Solution
A method and system that detect real-time usage of the camera for eyeprint recognition, calculate a current exposure initial value based on environmental light brightness, and adjust camera shooting parameters to optimize image quality, preventing the discard of dark frames.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a constant exposure initial value is adopted and adjusted slowly by algorithm, then the camera can maintain stable operation, but the image has a process from dark to bright causing many early frames to be too dark for eyeprint recognition
Solution Approach 1:
The patent applies preliminary action by detecting whether eyeprint recognition software is using the camera before capturing images, and if so, immediately adjusting the exposure initial value to an appropriate level. This prevents the camera from starting with a constant exposure value that would produce dark frames, thereby eliminating the time loss associated with discarding early dark frames while maintaining reliable camera operation.
2Adaptability or versatility
If exposure initial value is adjusted slowly by algorithm, then the camera can adapt to lighting conditions, but many early frames are too dark to use for eyeprint recognition and must be abandoned
Solution Approach 1:
The patent performs preliminary detection to determine if eyeprint recognition software is active, and if so, immediately sets the exposure initial value to an appropriate level before image capture begins. This eliminates the need to slowly adjust exposure through multiple frames, thereby maintaining lighting adaptability while significantly improving recognition speed by preventing dark frame abandonment.
Solution Approach 2:
The patent implements feedback by continuously monitoring the usage state of the camera by eyeprint recognition software and adjusting the exposure initial value accordingly. When the software is detected as active, the system feedback loop immediately modifies the exposure setting to ensure optimal image brightness, thereby maintaining adaptability while improving productivity.
3Ease of operation
If a constant exposure initial value is used, then the camera system is simple to operate, but the unlocking process takes relatively long time due to frame abandonment
Solution Approach 1:
The patent applies self-service by enabling the camera system to automatically detect when eyeprint recognition software is active and autonomously adjust its own exposure initial value without requiring external intervention or complex user configuration. This maintains ease of operation while reducing frame processing time by preventing dark frame generation in the first place.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach accelerates eyeprint recognition speed by ensuring accurate exposure settings, reducing unnecessary frame discard and enhancing user convenience.
Implementation Method 1
acquiring a light brightness value of a current environment and calculating a current exposure initial value according to the light brightness value
Data Source
AI summary
An eyeprint recognition-based mobile terminal camera self-adaptation adjustment method and system may include detecting in real time whether or not eyeprint recognition software in the mobile terminal uses a camera; acquiring a light brightness value of a current environment and calculating a current exposure initial value according to the light brightness value if the eyeprint recognition software in the mobile terminal uses the camera; and transmitting the current exposure initial value to the camera so that the camera performs self-adaptation adjustment on camera shooting configuration parameters according to the current exposure initial value.