Face Authentication Guide Frame for Wide-Angle Height Variation
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Solution Overview
Problem
Existing authentication systems face challenges in maintaining high authentication rates when dealing with individuals of varying heights, particularly for short individuals who may struggle to adjust their position to fit within a fixed face guide frame due to camera distortion in wide-angle views.
Innovation Solution
An authentication apparatus that adjusts the display of a guide frame on a touch screen based on the detected position of a user's face within the image, guiding the user to move their face into the frame for accurate authentication, and includes features to address issues like luminance and luminance differences to prevent distortion and blown-out highlights.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a wide-angle camera is used to accommodate various heights, then the coverage of authentication targets is improved, but distortion increases in the peripheral area of the field of view
Solution Approach 1:
The guide frame dynamically adjusts its position and size based on the detected face position in the captured image. The processor calculates the appropriate guide frame parameters and displays them in real-time, allowing the system to adapt to different face positions caused by peripheral distortion while maintaining accurate authentication
Solution Approach 2:
The system provides visual feedback by displaying the guide frame overlaid on the captured image, showing the user exactly where their face should be positioned. The guide frame updates in real-time based on the current face position, guiding the user to adjust until their face is properly centered for authentication
2Device complexity
If a fixed display position of the face guide frame is used, then the device complexity is reduced, but it becomes inconvenient for short persons to perform adjustment
Solution Approach 1:
The guide frame transitions from a fixed position to a dynamic position that automatically adjusts based on the detected face location. The processor continuously monitors the face position and recalculates the guide frame display position, making the system adaptive to users of different heights without requiring manual configuration
Solution Approach 2:
The system automatically detects the user's face position and adjusts the guide frame accordingly without requiring user input or manual adjustment. The processor analyzes the captured image, determines the optimal guide frame position, and displays it automatically, allowing users of any height to easily perform authentication
Data Source
AI summary
In an authentication apparatus, a camera captures an image including a face image that is an image of a face of an imaging target person, a touch screen displays the face image, a display control unit causes the touch screen to display a guide frame for guiding the imaging target person to an imaging position of the face based on a display position of the face image in the touch screen, and a personal authentication unit performs personal authentication using the face image when the face image is located within the guide frame.