Eye Imaging Mode Control for Iris 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 switching focal point control methods and adjusting capture volumes based on the purpose 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, allowing for high-quality images in one mode and reduced adjustment time in another, thereby optimizing image quality and capturing time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the capture volume is set with a small greatest distance (first imaging mode), then image quality is improved, but capturing time increases due to stricter focus requirements
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 high-quality image capture and a second distance (greater than the first) for faster capturing, allowing the system to adapt the capture volume parameters dynamically according to operational requirements.
2Productivity
If multiple focal point control methods are implemented to reduce capturing time, then productivity improves, but device complexity increases
Solution Approach 1:
The patent applies universality by implementing a single imaging unit that can operate in multiple imaging modes with different capture volume settings. Instead of using multiple separate systems or complex focal point control mechanisms, the system uses one imaging unit that can be configured with different greatest distances in the capture volume to serve different operational needs.
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.