Adaptive Authentication Imaging Guide for Subject Size Variation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In personal authentication systems, variations in the size of individuals (e.g., adults and children) require subjects to adjust their distance to match a fixed biometric guide figure, often leading to out-of-focus images and increased burden due to re-imaging or authentication failures.
Innovation Solution
An authentication image acquisition device that adjusts a guide frame size based on attribute information such as race, gender, and age, superimposing it on the captured image to guide the subject to an optimal imaging position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed-size biometric guide figure is displayed, then the guide structure is simple, but subjects of different sizes cannot be properly guided to the correct imaging position
Solution Approach 1:
The guide figure size is dynamically adjusted based on the detected subject size. The system determines the subject size from the captured image, selects an appropriate guide figure size from multiple predefined sizes, and displays the adapted guide figure to guide the subject to the correct position. This dynamic adaptation resolves the contradiction between handling different subject sizes and maintaining system simplicity.
Solution Approach 2:
The system changes the parameter of guide figure size based on subject characteristics. By detecting the subject size and selecting from multiple guide figure sizes (e.g., first size for adults, second size for children), the system adapts the guide parameters to match the subject, enabling proper positioning guidance for diverse subjects without complex additional hardware.
2Reliability
If the subject is positioned to match the biometric guide figure size, then the guide function is effective, but the subject may be outside the camera's depth of field
Solution Approach 1:
The system performs preliminary guidance by displaying the appropriately sized biometric guide figure before capturing the authentication image. This preliminary visual guidance helps the subject position themselves correctly within the depth of field, ensuring that when authentication is performed, the subject is at the correct distance and the capture succeeds without needing re-positioning.
Solution Approach 2:
The system provides visual feedback through the biometric guide figure that shows the subject their correct position. By matching the guide figure size to the subject size and displaying it in real-time, the system gives immediate feedback to the subject about whether they are positioned correctly, allowing them to adjust their position to ensure they are within the depth of field for successful authentication.
3Reliability
If re-imaging is performed due to authentication failure, then authentication accuracy can be improved, but the time required increases
Solution Approach 1:
The system performs preliminary guidance by displaying the appropriately sized biometric guide figure before capturing the authentication image. This preliminary visual guidance helps the subject position themselves correctly within the depth of field, ensuring that when authentication is performed, the subject is at the correct distance and the capture succeeds without needing re-positioning.
Data Source
AI summary
An authentication image acquisition device includes: a first imaging unit configured to capture an image of a target person to be authenticated; a generation unit configured to generate a guide image in which an imaging guide for guiding the target person to an imaging position is superimposed on a first captured image obtained by the first imaging unit; an acquisition unit configured to acquire information on the target person based on the first captured image; and a display unit configured to display the guide image. The generation unit is configured to generate an imaging guide having a size based on the information on the target person and superimpose the imaging guide on the first captured image.