Bill Authentication Using Weighted Infrared Transmitted Light Data
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Solution Overview
Problem
Conventional bill authentication apparatuses are inadequate in dealing with advanced counterfeit bills, particularly finely forged ones, and often have low accuracy, leading to increased complaints and potential for counterfeit bill crimes in game arcades and similar settings.
Innovation Solution
A method and apparatus that irradiate light of specific wavelengths onto a bill's print area, using a light emitting unit to compare transmitted and reflected light data, with a weighting applied to specific regions to enhance authentication accuracy, including regions that differ under visible and infrared light, such as watermark and latent image areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional authentication methods are used, then device complexity is low, but authentication accuracy deteriorates and cannot detect advanced counterfeit bills
Solution Approach 1:
The patent divides the bill authentication process into multiple independent comparison steps: a first comparing step that compares overall transmitted light data, and a second comparing step that compares weighted transmitted light data from specific regions. This segmentation allows the system to achieve high authentication accuracy by analyzing different aspects of the bill separately and comprehensively, without requiring a single overly complex authentication mechanism.
Solution Approach 2:
The patent applies different weighting to different regions of the bill based on their authentication value. Specifically, it determines specific regions in advance (such as areas with security features) and applies predetermined weighting to the transmitted light data from these regions in the second comparing step. This local quality approach ensures that critical regions contribute more to the authentication decision, improving accuracy without uniformly increasing complexity across the entire system.
2Reliability
If low authentication accuracy is used, then ease of operation is high and complaints are reduced, but reliability deteriorates and counterfeit bill crimes increase
Solution Approach 1:
The patent performs preliminary actions by determining specific regions in advance and storing reference data for these regions before actual authentication occurs. The system pre-processes genuine bills to create weighted reference data for specific regions, so that when a bill needs authentication, the system can directly compare using pre-established criteria. This preliminary preparation enhances reliability without adding operational complexity during the authentication moment itself.
Solution Approach 2:
The patent creates a detailed copy of genuine bill characteristics by storing transmitted light data from authentic bills as reference data. This reference data includes the optical properties of specific regions with security features. By comparing counterfeit bills against these authenticated copies, the system achieves high reliability in detecting forgeries while maintaining ease of operation through automated comparison processes.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach significantly improves authentication accuracy, effectively preventing counterfeit bill crimes by utilizing weighted data comparisons in specific regions, even in the presence of stains or creases, thereby enhancing the reliability of bill validation systems.
Implementation Method 1
irradiating light having a predetermined wavelength onto a print area of a surface of a bill to be authenticated from a light emitting unit, and comparing transmitted light data of light transmitted through the bill with the reference data
Data Source
AI summary
A method and apparatus authenticating a bill. The method irradiates infrared light having a predetermined wavelength onto a print area of a genuine bill, stores transmitted light data of light transmitted through the genuine bill as reference data, irradiates infrared light having the predetermined wavelength onto a print area of the bill to be authenticated, and compares transmitted light data of infrared light transmitted through the bill with the reference data. The method further determines in advance at least two specific regions having different invisibility under different lights of different wavelengths in a print area of the bill, applies a predetermined weighting to the transmitted light data of light in the specific regions of the bill to be authenticated and the genuine bill, and compares the weighted data with each other. Based on comparison results the bill is authenticated.