Core Line Extraction from Dermatoglyphic Images with Periodic Backgrounds

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Solution Overview

Problem

Existing methods for extracting core lines from images with dermatoglyphic patterns face accuracy issues when the background contains periodic shapes or patterns, leading to incorrect recognition of ridges and decreased matching process accuracy.

Innovation Solution

An information processing device is provided with an extraction unit for extracting core lines, an identification unit for evaluating the possibility of dermatoglyphic patterns based on image characteristics, and a correction unit for improving image quality based on these evaluations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If core line extraction is performed on images with periodic background patterns, then the extraction process can proceed, but the accuracy of core line extraction decreases due to incorrect ridge recognition

Engineering Contradiction:

Improvecore line extraction capabilityVSAvoidcore line extraction accuracy

Core Design Contradiction:

ProductivityVSMeasurement precision

Solution Approach 1:

The patent extracts and removes periodic background patterns from the image before performing core line extraction. By separating and eliminating the harmful periodic elements, the system can accurately extract core lines from the dermatoglyphic patterns without confusion from background interference.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent detects periodic background patterns and uses this information to generate correction data that inverts the periodicity. This converts the harmful periodic interference into a beneficial correction signal that actively compensates for the background pattern effects, improving extraction accuracy.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

2Loss of information

If background area contains periodic shapes or patterns, then image information is preserved, but these patterns are incorrectly recognized as ridges

Engineering Contradiction:

Improvebackground pattern informationVSAvoidridge recognition accuracy

Core Design Contradiction:

Loss of informationVSReliability

Solution Approach 1:

The system detects periodic background patterns and generates correction data based on this detection. The correction data is then applied to invert the periodicity effects, converting the harmful background patterns into corrected regions that do not interfere with ridge recognition.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Solution Approach 2:

The patent implements a feedback mechanism where the detected periodic background patterns are used to generate correction data that feeds back into the core line extraction process. This feedback loop continuously refines the extraction accuracy by compensating for background interference.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS12327405B2Information processing device, information processing method, and storage medium

Publication Date: 2025.06.10 NEC CORP

AI summary

An information processing device includes an extraction unit that extracts a core line from an image containing dermatoglyphic pattern; an identification unit that identifies an evaluation value indicating possibility of the dermatoglyphic pattern of the core line; and a correction unit that corrects the image based on the evaluation value.