Product Marking Verification Using Calibrated Camera and Edge Model
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Solution Overview
Problem
Current methods for checking product markings are inefficient as they require separate steps for layout and code verification, often leading to late identification of incorrect markings, which can result in significant retrospective correction costs and production disruptions.
Innovation Solution
A method and device that use a calibrated test camera to acquire images of product markings, checking both static and variable data in a single process by generating an edge model from the images, comparing it with reference data, and determining a correspondence characteristic to ensure correct and high-quality markings, including language and security element verification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If separate steps are used for layout and code verification, then the checking process can be simplified in terms of individual steps, but the overall efficiency decreases and errors are identified later
Solution Approach 1:
The patent combines layout verification and code verification into a single integrated checking step. The marking is captured in one image and simultaneously evaluated for both layout quality (position, machine-readability, contrast) and code accuracy (product information correctness), eliminating the need for separate verification steps and enabling immediate error detection.
2Reliability
If separate devices are used for layout checking and code checking, then each device can be specialized, but the system complexity increases and time is lost between checks
Solution Approach 1:
The patent employs a single verification device capable of performing both layout checking and code checking functions. The device captures the marking image and executes multiple verification tasks (layout quality assessment and code interpretation) within one integrated process, eliminating the need for separate specialized devices while maintaining comprehensive verification capability.
3Measurement precision
If layout checking and code checking are performed in separate steps, then each step can be thoroughly executed, but the total checking time increases
Solution Approach 1:
The patent implements continuous verification by performing layout checking and code checking in an uninterrupted sequence within a single checking step. The marking image is captured once and immediately processed for both layout evaluation and code interpretation without interruption or repositioning, maintaining thorough verification while minimizing checking time.
Data Source
AI summary
A method for checking a marking of a product. In an image acquisition step (3) at least one image (4) of the marking arranged on a surface of the product is acquired by a calibrated test camera, and in a layout checking step (1), using the at least one recorded image (4), the quality of the marking applied on the surface is checked with respect to static data such as position and machine-readability. Using the at least one image (4) recorded by the test camera, in addition to the checking of the quality of the marking in the layout checking step (1), in a code checking step (2), variable product information (12) contained in the marking is acquired and the acquired variable product information is compared with reference information from a reference information database (13). A correspondence characteristic is determined by means of the comparison.