Palm Vein Authentication Using Touch Panel Guidance
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Solution Overview
Problem
The integration of palm vein authentication into mobile terminal apparatuses faces challenges due to difficulties in using hand placement guides, close-range photography, and ensuring a wide enough photographing area, primarily because of their compact size and flat structure, which limits the use of zoom lenses and wide-angle lenses.
Innovation Solution
The information processing apparatus employs a touch panel to guide users through finger placement, using multiple camera modules to capture images of the palm vein while the hand moves between different tiers on the touch panel, adjusting blue LED emission angles to ensure in-focus images, and extracting matching images for authentication without relying on a hand placement guide.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a hand placement guide is used to guide finger placement, then authentication accuracy is improved, but device complexity and portability are worsened
Solution Approach 1:
The patent removes the physical hand placement guide from the device by extracting this separate component. Instead, the touch panel itself is used to display guide information and detect finger placement, eliminating the need for additional guide structures and maintaining authentication accuracy without the complexity of a separate guide mechanism.
Solution Approach 2:
The touch panel serves multiple functions: it displays guide information, detects finger placement operations, and captures images for authentication. By making the touch panel multi-functional, the patent eliminates the need for dedicated hand placement guide hardware while maintaining guidance accuracy.
2Measurement precision
If a hand placement guide is used to guide finger placement, then authentication accuracy is improved, but portability is worsened
Solution Approach 1:
The physical hand placement guide is extracted from the system and replaced by software-based guidance on the touch panel. This maintains authentication accuracy while significantly improving portability, as the mobile terminal no longer requires additional guide components.
3Ease of operation
If a compact flat structure is used for mobile terminal, then portability is improved, but close-range photography capability is worsened
Solution Approach 1:
The patent employs dynamic image capture during finger movement on the touch panel. Instead of requiring a fixed close-range photography setup, the system captures multiple images as the user's hand moves across the touch panel surface, adapting to the compact flat structure while maintaining imaging quality.
Solution Approach 2:
The patent transitions from traditional close-range photography to image capture in the context of touch panel interaction. By utilizing the vertical movement dimension on the touch panel and capturing images at different positions, the system achieves effective palm vein imaging without requiring specialized close-range photography hardware.
4Ease of operation
If a compact flat structure is used for mobile terminal, then portability is improved, but photographing area is worsened
Solution Approach 1:
The patent continuously captures images as the user's hand moves across the touch panel during the authentication process. This continuous image acquisition ensures that sufficient palm vein images are captured within the limited photographing area, maintaining authentication effectiveness without requiring a large fixed capture zone.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method allows for reliable palm vein authentication without a hand placement guide, improves close-range photography, and increases the photographed area, making the process more effective and portable.
Implementation Method 1
a camera; and a processor coupled to the touch panel and the camera
Implementation Method 2
adjusting blue LED emission angles to ensure in-focus images
Data Source
AI summary
An information processing apparatus includes a touch panel; a camera; and a processor coupled to the touch panel and the camera and configured to: display first guide information on the touch panel, display second guide information at a location different from a location of the first guide information on the touch panel when an operation to the first guide information is detected, acquire a plurality of images of a first palm photographed during a period from when a finger touching to the first guide information has been detected to when a finger touching to the second guide information has been detected, and extract a first authentication image for use in authentication of a user from the plurality of images of the first palm.