Dynamic Iris Authentication Mode Switching for Power and Accuracy
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Solution Overview
Problem
Iris authentication using infrared cameras in electronic devices faces challenges such as low accuracy, high power consumption, and a high false rejection rate due to the narrow capture angle and time-consuming image analysis, especially when detecting the iris area.
Innovation Solution
An electronic device equipped with a biometric sensor that emits infrared light and an infrared camera, which determines whether to perform iris-only authentication or complex authentication based on conditions such as illuminance and distance, using both face and iris images to enhance accuracy and reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If iris-only authentication is used with infrared camera, then power consumption is reduced and authentication speed is improved, but accuracy decreases and false rejection rate increases
Solution Approach 1:
The system dynamically switches between iris-only authentication mode and combined face-iris authentication mode based on environmental conditions (illuminance levels and capture distance). When conditions are favorable (sufficient light, appropriate distance), iris-only mode is used for low power consumption. When conditions are poor, the system transitions to combined authentication mode to maintain accuracy, thus adapting the authentication method to current operational context.
2Measurement precision
If combined face and iris authentication is performed, then authentication accuracy is improved and false rejection rate is reduced, but power consumption increases
Solution Approach 1:
The system selectively activates combined authentication mode only when environmental conditions (low illuminance or excessive capture distance) indicate that iris-only authentication would fail. This dynamic condition-based activation ensures high accuracy is maintained only when necessary, minimizing power consumption during normal operating conditions where iris-only authentication suffices.
3Adaptability or versatility
If infrared camera is used for iris detection, then authentication can be performed in various lighting conditions, but capture angle is narrow and image analysis time increases
Solution Approach 1:
The authentication process is segmented into two distinct modes: iris-only authentication for normal conditions and combined face-iris authentication for challenging conditions. This segmentation allows the system to use the faster, simpler iris-only process when possible, while reserving the more time-consuming combined analysis only for cases where environmental conditions require it, thus reducing overall image analysis time.
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
The solution improves authentication accuracy, reduces power consumption, and lowers the false rejection rate by dynamically switching between iris-only and complex authentication methods based on environmental conditions, ensuring reliable and efficient user verification.
Implementation Method 1
a biometric sensor including a light emitting element emitting light of an infrared wavelength band
Implementation Method 2
an infrared camera obtaining an image based on the light of the infrared wavelength band
Data Source
AI summary
An iris-based authentication method is provided. The method includes emitting light of an infrared wavelength band and obtaining an image based on the light of the infrared wavelength band, determining whether a specified condition is satisfied, if the specified condition is satisfied, performing user authentication (e.g., complex authentication) based on at least part of a face image and an iris image of the image that a biometric sensor obtains, or, if the specified condition is not satisfied, performing the user authentication (e.g., iris-only authentication) based on the iris image in the image that the biometric sensor obtains.