Printing System Random Code Positioning for Falsification Detection
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Solution Overview
Problem
Existing falsification determination methods for printed information codes, such as those using special ink and specific wavelength light, are limited in versatility and applicability, necessitating a more universal technique for determining and preventing falsification.
Innovation Solution
A printing system that randomly determines the position of an information code on a print medium within a printable region, modifies print data to include positional information, and compares post-printing positional information with pre-printing data to determine if the printing result is falsified, without relying on special ink or devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If special ink and specific wavelength light are used for falsification determination, then the accuracy of detecting genuine items is improved, but the versatility and applicability of the system deteriorates due to limited device availability
Solution Approach 1:
The patent extracts the core verification function from the special ink reading system and implements it through standard printing and reading devices. By removing the dependency on special ink and specific wavelength light, the system achieves universality while maintaining falsification detection capability through positional information verification of information codes.
Solution Approach 2:
The patent makes the falsification determination system universally applicable by using common printing devices and reading devices that can handle standard information codes. The system can verify authenticity through positional information embedded in the code structure, enabling any standard device to perform falsification detection without requiring specialized equipment.
2Ease of manufacture
If the information code position is fixed, then the printing process is simple, but the security against falsification deteriorates as it becomes easy to attach codes to other media
Solution Approach 1:
The patent implements dynamic positioning of information codes where the position varies based on printed matter characteristics. The printing position determination unit randomly or characteristically determines code positions, and the reading unit acquires positional information to verify authenticity. This dynamic approach prevents falsification while maintaining printing simplicity.
Solution Approach 2:
The patent performs preliminary determination of information code positions based on printed matter characteristics before actual printing. The printing position determination unit establishes the position in advance, and this positional information is embedded in the code structure, enabling subsequent verification without complicating the printing process.
3Reliability
If random positioning of information codes is implemented, then the security against falsification is improved, but the complexity of the printing and verification system increases
Solution Approach 1:
The patent implements self-service verification where the information code contains embedded positional information that enables its own verification. The reading unit acquires the position from the printed matter and compares it with the position information in the code structure, allowing the system to verify authenticity without external intervention or complex verification equipment.
Solution Approach 2:
The patent embeds positional information within the information code structure itself, creating a nested verification mechanism. The code contains both the information data and the positional verification data in a hierarchical structure, allowing verification to be performed by simply reading the code with standard devices without adding external complexity.
Data Source
AI summary
A printing system includes a printing unit, a position determiner that randomly determines a position where a first information code is to be set, a modifier that modifies print data for printing an image, the first information code, and a positional information code having recorded therein positional information at the time of printing that indicates the position determined by the position determiner so that the first information code is set at the position determined by the position determiner, an acquirer that acquires the position of the first information code on a print medium as positional information and acquires the positional information at the time of the printing from the positional information code, and a determiner that determines whether the printing result is a falsified matter based on comparison of the positional information after the printing with the positional information at the time of the printing.