Finger Rolling Biometric Registration Apparatus

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Solution Overview

Problem

Existing biometric verification systems using fixed image pickup cameras struggle with precise identification due to finger tilting and sinking, which can lead to poor image quality, and require larger apparatuses with insertion holes to stabilize the finger.

Innovation Solution

A registration apparatus and method that calculates and corrects positional differences between images to align a finger's blood vessel patterns without the need for guiding holes, using a fixed camera to roll the finger on its surface, allowing for precise alignment and registration.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If a turntable that rotates around a finger is used, then precise identification of the user is achieved, but the apparatus size increases

Engineering Contradiction:

Improveuser identification precisionVSAvoidapparatus size

Core Design Contradiction:

Measurement precisionVSArea of stationary object

Solution Approach 1:

The patent replaces the mechanical turntable rotation system with a fixed camera system that captures images of a rolling finger. Instead of mechanically rotating the camera around the finger using a turntable, the finger itself is rolled across the camera sensor plane, substituting complex mechanical motion with a simpler rolling action that achieves the same multi-angle imaging goal without requiring a large rotating apparatus

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent inverts the traditional approach by having the finger roll across the camera instead of the camera rotating around the finger. This inversion simplifies the mechanical requirements from a rotating turntable system to a fixed camera with a rolling finger, reducing apparatus size while maintaining the ability to capture blood vessel patterns from multiple positions

Inventive Principle:

Principle #13The other way round (Inversion)

2Area of stationary object

If a fixed image pickup camera is used, then the apparatus size is reduced, but the finger may tilt or sink causing poor image quality

Engineering Contradiction:

Improveapparatus sizeVSAvoidimage quality

Core Design Contradiction:

Area of stationary objectVSMeasurement precision

Solution Approach 1:

The patent changes the parameter of finger position by calculating positional differences between consecutive images and adjusting the registration position accordingly. This dynamic parameter adjustment compensates for finger tilting and sinking variations, maintaining image quality despite the fixed camera position and natural finger movement during rolling

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent implements feedback by calculating the positional difference between the current image and previous image, then using this information to correct the position of the current image during registration. This feedback mechanism continuously adjusts for finger position variations caused by tilting or sinking, ensuring consistent image quality throughout the rolling process

Inventive Principle:

Principle #23Feedback

3Stability of the object's composition

If an insertion hole is added to immobilize the finger, then finger stability is improved, but the apparatus size increases

Engineering Contradiction:

Improvefinger stabilityVSAvoidapparatus size

Core Design Contradiction:

Stability of the object's compositionVSArea of stationary object

Solution Approach 1:

The patent replaces the mechanical insertion hole structure with a computational approach. Instead of physically constraining the finger through an insertion hole, the system uses image processing to calculate and correct positional differences, achieving finger stabilization through software rather than additional mechanical components

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces an intermediary computational process (positional difference calculation) between the fixed camera and the rolling finger. This intermediary step mediates the relationship by automatically adjusting for position variations, eliminating the need for physical constraints like insertion holes while maintaining finger stability during the rolling process

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS8103124B2Registration apparatus, registration method and program

Publication Date: 2012.01.24 SAMSUNG ELECTRONICS CO LTD

AI summary

A registration apparatus includes: a calculation section that calculates a positional difference between a part of a physical trait on a first image that is processed and a corresponding part of the physical trait on a second image that was processed earlier than the first image, the physical trait being used for verification; a connecting section that connects the first image to the second image after correcting, in accordance with the calculated positional difference, the position of the first image such that a part of the physical trait on the first image is overlapped with a corresponding part of the physical trait on the second image; and a registration section that registers the connected image in a storage medium.