Vein Authentication Lens Focusing and Visual Overlay
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Solution Overview
Problem
Conventional image authentication systems for vein recognition require cumbersome operations and restrict the degree of freedom of the hand, making it difficult to obtain a detected image that coincides with a recorded image, especially in portable devices where guide members are improper for installation.
Innovation Solution
An image authenticating apparatus and method that superposes a target image with the detected image on a screen, allowing users to adjust the position and form of the detected image to match the target image, and controls the lens of the image-capturing unit to locate it at a focusing position, ensuring the detected image is optimum for authentication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a sensor guide or fingertip guide is provided to position the hand, then the positioning accuracy is improved, but the device complexity increases and the guide members project out of the device making them improper for portable installation
Solution Approach 1:
The patent replaces mechanical positioning guides (sensor guide 408, fingertip guide 412) with a visual display system that shows the detected image and recognition range on a screen. The user positions their hand based on visual feedback rather than physical contact with guide members, eliminating the need for protruding mechanical guides while maintaining positioning accuracy.
Solution Approach 2:
The patent displays a visual representation (copy) of the detected image and recognition range on the screen to guide hand positioning. Instead of using physical guide members, the system creates a visual copy of what the user should see and positions, allowing portable device installation while maintaining positioning guidance functionality.
2Measurement precision
If the user manually adjusts the distance between camera and palm while viewing the recognition range frame, then the positioning accuracy is improved, but the ease of operation deteriorates due to cumbersome operations
Solution Approach 1:
The patent implements a feedback mechanism where the detected image and recognition range are displayed on the screen in real-time. The user can see whether their hand is properly positioned within the recognition range and adjust accordingly, providing continuous visual feedback that simplifies the positioning process compared to manually adjusting distance while viewing a simple frame.
Solution Approach 2:
The patent transitions from a two-dimensional frame display to displaying the actual detected image with recognition range overlay on the screen. This additional visual dimension provides more information to the user about hand positioning accuracy, making the operation easier while maintaining precision.
3Stability of the object's composition
If a ring is provided to prevent hand shift, then the positioning stability is improved, but the ease of operation deteriorates due to restricted degree of freedom
Solution Approach 1:
The patent replaces the mechanical ring constraint with a visual display system that shows the recognition range and detected image on the screen. The user can freely move their hand without physical constraints while the system provides visual feedback to guide proper positioning, maintaining stability without restricting freedom of movement.
Data Source
AI summary
The invention to be provided relates to focusing control for obtaining a detected image necessary for image authentication. Through the focusing control, a lens is controlled to be located at an optimum position upon starting authentication. An image authenticating apparatus compares a detected image with a recorded image to carry out authentication using the detected image and the recorded image. The apparatus includes an image-capturing unit (camera unit) that obtains the detected image by capturing an image of a photographed subject, a display unit (image display unit) that displays the detected image on a screen displaying a target image showing the outline of a portion to be detected, and a controlling unit (image processing unit) that controls the lens of the image-capturing unit to locate the lens at a given focusing position relative to the photographed subject upon obtaining the detected image.