Iris Imaging Mode Control for Image Quality and Capture Time
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Solution Overview
Problem
Existing imaging systems for iris authentication face challenges in balancing image quality with capturing time and complexity, particularly in adjusting capture volumes and focal point control to meet different purposes of use.
Innovation Solution
An imaging system that includes an imaging unit and a mode control unit to select between first and second imaging modes, adjusting the capture volume based on distance from the optical axis to optimize image quality and capturing time for registration and authentication processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the capture volume is set with a smaller greatest distance (first imaging mode), then image quality is improved, but capturing time increases
Solution Approach 1:
The patent applies dynamics by making the capture volume adjustable based on imaging mode. The greatest distance in the capture volume is set to a first distance for registration mode (requiring high image quality) and a second distance for authentication mode (requiring faster capture). This dynamic adjustment of capture volume parameters allows the system to optimize between image quality and capturing time depending on the specific imaging task.
2Adaptability or versatility
If multiple imaging modes with different capture volumes are implemented, then adaptability is improved, but device complexity increases
Solution Approach 1:
The patent implements universality by enabling a single imaging unit to perform multiple imaging modes (registration and authentication) by adjusting the capture volume parameters. Instead of requiring separate imaging units or complex multi-system architecture, the system uses one imaging unit that can adapt its capture volume greatest distance parameter to suit different imaging purposes, thereby achieving multi-functionality without proportionally increasing device complexity.
Data Source
AI summary
An imaging system (1) includes an imaging unit (2) configured to capture an eye of a target person, and a mode control unit (4) configured to select one of imaging modes including a first imaging mode that sets a capture volume for which a greatest distance from the imaging unit (2) in an optical axis direction of the imaging unit (2) is a first distance, and a second imaging mode that sets the capture volume for which the greatest distance from the imaging unit is a second distance, in which the second distance is greater than the first distance. With the imaging system (1), a balance between an image quality matching a purpose of use and a capturing time may be easily achieved.