3D Shape Authentication Apparatus for Privacy-Safe Biometrics
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Solution Overview
Problem
Existing personal authentication systems face challenges in performing authentication using images without registering camera images, primarily due to privacy concerns.
Innovation Solution
A processing apparatus and system that acquires and collates three-dimensional shape information from camera images, rather than the images themselves, allowing for personal authentication without storing camera images in databases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If camera images are registered in databases for personal authentication, then authentication accuracy is improved, but privacy issues arise
Solution Approach 1:
The patent extracts only the essential three-dimensional shape information from camera images, separating it from the actual image data. This allows authentication to be performed using only geometric features (distances between facial landmarks) while discarding the visual appearance data that causes privacy concerns.
Solution Approach 2:
The patent introduces three-dimensional shape data as an intermediary between the original camera image and the authentication process. Instead of directly using or storing camera images, the system converts them into 3D shape representations that retain authentication capability while removing privacy-invasive visual information.
2Object-affected harmful factors
If three-dimensional shape information is used instead of camera images, then privacy protection is improved, but system complexity increases
Solution Approach 1:
The patent segments the facial recognition process into distinct stages: capturing camera images, extracting facial landmarks, calculating three-dimensional distances, and performing authentication. This segmentation allows each component to be optimized independently and simplifies the overall system architecture.
Solution Approach 2:
The patent changes the parameters used for authentication from two-dimensional image data to three-dimensional distance measurements. By transforming the data representation from visual images to geometric parameters, the system achieves better privacy protection while maintaining authentication functionality.
Data Source
AI summary
To perform personal authentication using an image without registering a camera image, the present invention provides a processing apparatus 10 including: an acquisition unit 11 that acquires collation information including a camera image being an image of a collation-target person generated by a camera, or an image being restored from the camera image and representing a three-dimensional shape of a person; a collation unit 12 that collates the collation information with reference person information including an image being restored from a camera image and representing a three-dimensional shape of each of a plurality of reference persons; and an output unit 13 that executes processing depending on a result of the collation.