Adaptive Iris Recognition Infrared Emission Control
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Solution Overview
Problem
Electronic devices face errors in iris recognition due to strong outdoor infrared light or incandescent lamps, and there is a risk of eye damage from consistent infrared light emission during iris recognition.
Innovation Solution
An electronic device with an image sensor module, a light emitting module, and a processor that identifies the iris recognition environment and adjusts parameters such as infrared light emission time and intensity, as well as image sensor sensitivity, to adapt to the environment and ensure user safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If infrared light emission intensity is increased to improve iris recognition accuracy in bright environments, then measurement precision is improved, but object-affected harmful factors worsen due to potential eye damage
Solution Approach 1:
The patent implements dynamic adjustment of infrared light emission intensity based on environmental conditions and distance measurements. The system continuously adapts the light emission parameters rather than using fixed intensity levels, allowing optimal recognition accuracy while minimizing eye damage risk in different scenarios
Solution Approach 2:
The system changes multiple parameters including infrared light emission intensity, emission duration, and timing based on environmental assessment. By adjusting these parameters dynamically, the system achieves accurate iris recognition in varying lighting conditions without exceeding safety thresholds for eye exposure
2Measurement precision
If infrared light emission time is extended to improve iris recognition in challenging environments, then measurement precision is improved, but object-generated harmful factors worsen due to increased exposure risk
Solution Approach 1:
The system uses periodic or pulsed infrared light emission rather than continuous emission. By controlling the timing and duration of light pulses in sync with image capture, the system achieves sufficient recognition accuracy while minimizing total exposure time and associated health risks
Solution Approach 2:
The patent implements rapid sequential capture of multiple images with brief infrared illumination for each capture. This approach rushes through the recognition process with minimal exposure per frame, achieving reliable recognition through image processing while keeping harmful exposure at minimum levels
3Reliability
If consistent infrared light emission is used to ensure reliable iris recognition, then reliability is improved, but object-generated harmful factors worsen due to continuous exposure risk
Solution Approach 1:
The system replaces continuous infrared emission with periodic pulsed emission synchronized to the image capture cycle. This maintains reliable recognition by ensuring illumination is present during each capture while eliminating unnecessary continuous exposure that creates health risks
4Measurement precision
If infrared light emission intensity is increased to overcome strong outdoor infrared light, then measurement precision is improved, but object-affected harmful factors worsen due to saturation and recognition errors
Solution Approach 1:
The patent introduces a proximity sensor as an intermediary that measures distance between the device and user's eye. This distance information serves as a mediator to determine appropriate infrared emission intensity, allowing the system to compensate for environmental infrared light without exceeding saturation levels or causing harm
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 enables adaptive iris recognition, reducing errors and ensuring user safety by adjusting infrared light emission based on environmental conditions and distance, while also reducing power consumption.
Implementation Method 1
a light emitting module configured to emit infrared light
Implementation Method 2
detect the infrared light reflected from a user's iris
Data Source
AI summary
Various embodiments of the present invention relate to a device and method for controlling iris recognition parameters in an electronic device. Here, the electronic device may comprise a processor for: identifying an iris recognition environment using an image sensor module for acquiring an image, a light emitting module for emitting an infrared ray, and input information of the electronic device; modifying at least one iris recognition parameter on the basis of the iris recognition environment; emitting an infrared ray through the light emitting module on the basis of the modified iris recognition parameter; and performing iris recognition using an image acquired by the image sensor module. Various other embodiments are also possible.