Fingerprint Sensing System Non-Overlapping Image Correlation
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Solution Overview
Problem
Current fingerprint sensing systems face inefficiencies and robustness issues when dealing with non-overlapping partial images, particularly in scenarios where the finger is swiped at incorrect speeds or due to errors in image acquisition, leading to incomplete fingerprint data that is typically discarded.
Innovation Solution
A method that determines the relative spatial position and relation of fingerprint features from non-overlapping partial images, allowing for the formation of a complete fingerprint representation by correlating parameters between these features, even when images are not spatially related, and enabling the use of previously formed representations to append new features.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If overlapping images are used for stitching, then the complete fingerprint image can be formed, but the system becomes highly dependent on overlap quality and requires extensive computing resources
Solution Approach 1:
The patent divides the fingerprint acquisition process into independent non-overlapping partial images, each processed separately to extract fingerprint features. This segmentation eliminates the need for complex overlapping image stitching while maintaining complete fingerprint formation capability through parameter correlation between separate image portions.
Solution Approach 2:
The patent transforms the approach from spatial image stitching to parameter-based feature correlation. By determining parameters such as relative spatial fingerprint position and relation to the finger for each partial image, the system can form complete fingerprints through parameter correlation rather than requiring extensive image overlap and processing.
2Productivity
If non-overlapping partial images are used, then computing resources are reduced, but the system cannot reliably form complete fingerprints when images are not spatially related
Solution Approach 1:
The patent introduces parameters (relative spatial fingerprint position, relation to finger) as intermediaries that bridge non-overlapping partial images. These parameters serve as mediators that enable correlation between separate image portions, allowing complete fingerprint formation without requiring spatial overlap between images.
3Loss of information
If extensive overlapping images are collected, then complete fingerprint data can be obtained, but processing time increases significantly
Solution Approach 1:
The patent uses multiple non-overlapping partial images instead of extensive overlapping images. By capturing several separate portions of the fingerprint and correlating their parameters, the system achieves complete fingerprint data formation with reduced processing requirements compared to traditional overlapping image stitching methods.
Data Source
AI summary
The present invention generally relates to a method for forming a fingerprint using a fingerprint sensing system, and specifically to the possibility of allowing the formation of a fingerprint when only separated portions of the fingerprint is available. The invention also relates to the corresponding fingerprint sensing system and to a computer program product.