Data Acquisition Region Positioning for Tablet Authenticity
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Solution Overview
Problem
Existing methods for authenticity discrimination of objects with random patterns on their surfaces, such as tablets, face challenges in determining the correct region for data acquisition due to misalignment of printing information, which can lead to insufficient information for accurate determination.
Innovation Solution
A data acquiring apparatus and genuineness discriminating apparatus that determine the region for acquiring registration data based on both the external shape and the position of printing information, including lines and characters, by extending a line segment and calculating the perpendicular bisector to establish a precise center coordinate for data acquisition, ensuring the region is not affected by printing misalignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If the position of the registration data acquisition region is determined based on printing information only, then the data acquisition can be automated, but printing misalignment causes the acquisition region to be displaced and insufficient information is acquired
Solution Approach 1:
The patent combines two positioning methods: printing information-based positioning and external shape-based positioning. By merging these approaches, the system uses printing information to identify the object and determine orientation, while simultaneously using external shape features (edge portions, line segments, perpendicular bisectors) to accurately locate the acquisition region center, thereby compensating for printing misalignment and ensuring both automation and positioning precision.
2Loss of information
If the acquisition region is positioned at the peripheral portion of the tablet, then sufficient information quantity is obtained, but printing misalignment makes it difficult to accurately locate the intended region
Solution Approach 1:
The patent changes the reference parameter from printing information alone to a combination of printing information and external shape parameters. By using external shape features (edge portions, line segments connecting opposing edges, perpendicular bisectors) as stable geometric references, the system can accurately locate the acquisition region center even when printing position varies, thus maintaining both information quantity and positioning accuracy.
3Device complexity
If printing information is used to determine acquisition region position, then the process is simple, but misalignment during printing displaces the acquisition region
Solution Approach 1:
The patent introduces external shape features as an intermediary reference system. Instead of relying directly on printing information (which may be misaligned), the system uses stable geometric features of the object itself (edge portions, line segments, perpendicular bisectors) as intermediaries to accurately determine the acquisition region position, thereby maintaining simplicity while improving reliability.
Data Source
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AI summary
A registration data acquirer determines a position of a registration data acquisition region from an image captured by a detection camera based on an external shape of a tablet and a position of a printing pattern printed on the tablet. A collation data acquirer determines a position of a collation data acquisition region from an image captured by an inspection camera based on the external shape of the tablet and the position of the printing pattern. A verifier compares registration data with collation data in the same tablet, to thereby verify that reliability of the registration data is equal to or larger than a predetermined criterion value.