Eyeball Identification Using Gaze Guidance for Optical Axis Offset
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Solution Overview
Problem
Existing iris authentication systems degrade in accuracy when users gaze in specific directions, and device direction correction is time-consuming and inconvenient.
Innovation Solution
A target identification device with a display element and imaging element having optical axis deviation, guided by a processor to align the user's sight direction with the imaging element's optical axis for accurate eyeball recognition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the imaging element is disposed with deviation from the display element's optical axis, then the device structure is simplified and manufacturing is easier, but the identification accuracy is degraded when users gaze in specific directions
Solution Approach 1:
The system performs preliminary action by displaying guidance information to the user before the actual imaging process, directing the user to adjust their gaze to the correct position. This preliminary guidance ensures that when imaging occurs, the eyeball is properly positioned despite the optical axis deviation, thereby maintaining identification accuracy while keeping the imaging element in a simplified deviated position
Solution Approach 2:
The guidance information acts as an intermediary between the deviated imaging element and the user's eyeball. It mediates the positioning relationship by informing the user where to direct their gaze, effectively compensating for the optical axis deviation without requiring physical realignment of the imaging element
2Device complexity
If the imaging element is disposed with deviation from the display element's optical axis, then device complexity is reduced, but the reliability of identification is degraded under varying gaze conditions
Solution Approach 1:
The system displays guidance information before imaging to preliminarily position the user's gaze correctly. This preliminary action ensures reliable identification results even though the imaging element has a fixed deviated position, making the system reliable without requiring complex realignment mechanisms
3Adaptability or versatility
If users must correct device direction manually while viewing face images, then adaptability to different user positions is improved, but the identification time is significantly increased
Solution Approach 1:
Instead of requiring the user to physically adjust the device direction, the system inverts the approach by providing visual guidance information on the display that directs the user to adjust their gaze position. This inversion maintains adaptability while dramatically reducing identification time by eliminating iterative device adjustment
Solution Approach 2:
The system replaces the mechanical adjustment of device direction with an information-based guidance system. The display presents visual information that guides the user's gaze, substituting physical mechanical adjustment with an information field-based approach that is much faster and more efficient
Data Source
AI summary
In order to provide a target identification device capable of performing recognition in a short period of time with high recognition accuracy, the target identification device includes: a display element; an imaging element that has an optical axis direction with deviation from an optical axis direction of the display element and captures an image of an eyeball of a user; a guide unit that performs guiding such that a sight direction of the user is directed to the optical axis direction of the imaging element; and an identification unit that identifies the eyeball on the basis of a feature amount calculated from the image of the eyeball in a state in which the guide unit has guided the sight direction to being directed in the optical axis direction of the imaging element.