Iris Authentication Display Brightness Adjustment for Pupil Size Variation
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Solution Overview
Problem
Iris recognition accuracy in electronic devices is compromised by variations in pupil size due to changes in surrounding brightness, which affects the size of the iris image, leading to decreased recognition rates in portable devices.
Innovation Solution
An electronic device with an image sensor and display that adjusts output characteristics, such as brightness, to ensure the iris image is of a predetermined size for authentication, improving recognition accuracy by matching the image size to the registered iris image.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the electronic device uses standard iris recognition without adjusting display brightness, then the device complexity is low, but the iris recognition accuracy decreases due to pupil size variation
Solution Approach 1:
The system performs preliminary detection of the pupil region before iris recognition, and adjusts the display brightness in advance to ensure the iris image meets the predetermined size requirement. This preliminary adjustment prevents recognition errors before they occur, improving accuracy without adding complex real-time intervention mechanisms.
Solution Approach 2:
The control unit detects the pupil region size and uses this feedback information to determine whether display output characteristics need adjustment. This feedback loop ensures the iris image size meets recognition requirements while avoiding unnecessary adjustments, balancing accuracy with system simplicity.
2Productivity
If the display brightness is adjusted to maintain consistent iris image size, then the recognition speed increases, but the use of energy increases
Solution Approach 1:
The system adjusts display brightness only when the detected pupil region indicates the iris image size is outside the predetermined range. This partial adjustment approach avoids continuous brightness changes, reducing energy consumption while still achieving consistent image size for fast recognition when needed.
3Adaptability or versatility
If the electronic device adjusts display output characteristics based on pupil detection, then the adaptability to different lighting conditions improves, but the ease of operation decreases
Solution Approach 1:
The system automatically detects the pupil region and adjusts display brightness without requiring user intervention. The device serves itself by monitoring its own display output characteristics and making necessary adjustments, improving adaptability while maintaining ease of operation through automation.
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 enhances iris recognition accuracy and speed by maintaining a consistent image size, reducing the number of objects to compare during authentication and lowering false rejection rates.
Implementation Method 1
an image sensor that outputs an image obtained by photographing an eye region
Implementation Method 2
a display that displays an iris authentication screen
Data Source
AI summary
An electronic device for performing iris authentication, according to various examples of the present invention, can comprise: an image sensor for outputting an image obtained by photographing an eye part; a display for displaying an iris authentication screen image; and a control unit detecting at least a partial region from the captured eye part image so as to perform iris authentication by adjusting display characteristics of the display on the basis of a result obtained by comparing the size of the detected region with the size of a region required for the iris authentication, and various examples are possible.