Document Surface Height Analysis for Counterfeit Detection
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Solution Overview
Problem
The illegal manufacture of counterfeit official documents poses a significant security risk, as counterfeit identification documents can be used to bypass border controls and other verification processes, leading to criminal activities.
Innovation Solution
A method that involves obtaining an image of a document's surface, deriving a representation of its height levels, generating a string of characters based on this representation, and associating it with identification information, allowing for unique document identification and verification through databases, even under varying lighting conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional document verification methods are used, then the verification process is simple, but counterfeit documents cannot be reliably distinguished from authentic documents
Solution Approach 1:
The verification system segments the document surface into multiple sections and analyzes height levels of individual sections independently. Each section's height level data is processed separately to generate character information, which is then combined for comprehensive verification. This segmentation approach enables reliable counterfeit detection while maintaining manageable system complexity through modular processing.
2Reliability
If surface height level analysis is performed to generate unique document identification, then document verification reliability improves, but the complexity of the verification process increases
Solution Approach 1:
The system replaces complex mechanical or manual document examination methods with optical or electromagnetic scanning technology that automatically captures surface height level information. This substitution enables precise three-dimensional surface analysis without requiring complex mechanical contact measurement devices, thereby improving identification accuracy while controlling system complexity through non-contact digital measurement.
3Reliability
If detailed surface structure data is captured and stored for verification, then the ability to detect counterfeit documents improves, but data processing and storage requirements increase
Solution Approach 1:
The system extracts only the essential height level information from each surface section that is necessary for verification, rather than storing complete raw image data or exhaustive surface measurements. By selecting and storing only the critical height level parameters needed for counterfeit detection, the system maintains high detection capability while significantly reducing data volume and storage requirements.
Data Source
AI summary
An apparatus configured to perform or control obtaining or causing obtaining an image of at least a part of a surface of a document. The apparatus deriving or causing the derivation of a representation of the at least a part of the surface from the image. The representation comprising a set of values respectively representing a corresponding set of height levels. The apparatus generates or causes the generating of a string of characters based on the representation of the part of the surface. The string of characters comprising a first portion representative of the set of height levels of the corresponding sections of the part of the surface and a second portion generated based on a function of the representation and/or of the first portion of the string of characters. The apparatus associates or causes the associating of information representing the string of characters with identification information of the document.