Document Authentication Apparatus Using Key Information Comparison
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Solution Overview
Problem
Existing image processing technologies fail to effectively prevent the malicious distribution of false documents as originals, as they only prohibit copying if a particular image is present on both sides of a sheet, but do not verify the authenticity of the document.
Innovation Solution
An image processing apparatus and method that includes a reader, output portion, detector, comparator, and controller to read and compare key information pieces on both sides of a document, ensuring that the information matches to authenticate the document, and only allows output if the information is consistent across all sheets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If key information pieces are embedded on both sides of each sheet to verify authenticity, then document authentication capability is improved, but device complexity increases
Solution Approach 1:
The document is divided into individual sheets, and key information pieces are embedded on both sides of each sheet. The authentication process is segmented by processing each sheet independently through the reader, detector, and comparator, allowing the system to verify authenticity sheet by sheet without requiring complex system-wide coordination.
Solution Approach 2:
Key information pieces serve as intermediary elements that mediate between the front and back sides of each sheet. These pieces are detected by the detector and compared by the comparator to verify authenticity, acting as a bridge that connects the two sides of the document without requiring direct interaction between them.
2Reliability
If image data output is prohibited for sheets with mismatched key information, then document security is improved, but productivity decreases
Solution Approach 1:
The system performs preliminary authentication by detecting and comparing key information pieces on both sides of each sheet before allowing image data output. This preliminary action ensures that only authenticated sheets are processed further, preventing security breaches while maintaining efficient workflow for legitimate documents.
Solution Approach 2:
The comparator provides feedback about the authentication status of each sheet to the controller, which then decides whether to permit or prohibit image data output. This feedback mechanism ensures that security measures are applied selectively based on actual authentication results, allowing high productivity for authenticated sheets while maintaining security for unauthenticated ones.
3Reliability
If key information pieces are embedded on both sides of sheets, then ability to detect false documents is improved, but measurement precision requirements increase
Solution Approach 1:
The system creates a digital copy of the key information pieces from the physical document using the reader. This digital copy is then processed and compared with the original key information pieces detected from the document. The copying process allows for precise comparison without requiring physical manipulation or high-precision measurement of the original document features.
Solution Approach 2:
The system changes the parameter representation of key information pieces from physical forms to digital data formats. By converting the physical key information into digital representations that can be easily compared, the system achieves high detection accuracy for false documents without requiring complex or imprecise measurement systems.
Data Source
AI summary
A detector detects a first key information piece embedded on one side of one sheet or more than one respective sheets from which image data is read out by a reader, and a second key information piece embedded on the other side thereof or on another sheet. And a comparator compares to each other, the detected first and second key information pieces and judges whether or not these key information pieces are related to each other. Then, a controller permits an output portion to output image data read out from all judgment target sheets if it is judged about all these respective sheets that the first and second key information pieces are related to each other, meanwhile the controller prohibits the output portion from outputting image data read out from one sheet if it is judged about this sheet that those key information pieces are not related to each other.