Printing Method Determination via Line-Segment Image Analysis
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Solution Overview
Problem
Existing techniques are unable to accurately determine whether a printed product was produced using a plate-based printing method or a printer that performs printing through scanning with a driving system.
Innovation Solution
A determination system that captures images of a printed surface and analyzes line-segment images to differentiate between printing methods based on undulation degrees, determining the printing method used by comparing determination data from selected areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing determination techniques are used, then only area coverage modulation method printing can be detected, but determination capability for plate-based printing and scanning-based printing is insufficient
Solution Approach 1:
The patent divides the printed surface into multiple determination areas and extracts line-segment images from each area. By segmenting the image analysis into distinct determination areas and extracting specific line-segment features from each, the system can compare characteristics across different regions to reliably distinguish between plate-based printing (with consistent line segments) and scanning-based printing (with varying line segments), thereby improving determination accuracy for multiple printing methods.
2Measurement precision
If line-segment image analysis is performed, then printing method differentiation is achieved, but image processing complexity increases
Solution Approach 1:
The patent extracts line-segment images from the captured printed surface images, isolating the specific features needed for determination. By taking out only the line-segment portions and excluding other elements, the system simplifies the analysis process to focus solely on comparing line segment characteristics (such as straightness and continuity) between determination areas, thereby achieving accurate printing method differentiation without processing the entire complex image.
3Measurement precision
If multiple determination areas are selected and compared, then printing method determination accuracy is improved, but processing time increases
Solution Approach 1:
The patent performs preliminary extraction and preparation of line-segment images from multiple determination areas before the actual comparison and determination process. By pre-processing and organizing the line-segment data from various areas, the system enables efficient comparison and reduces the time required for final determination, as the necessary features are already extracted and ready for analysis.
Data Source
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AI summary
A determination system includes an imaging data acquisition device that captures an image of a printed surface of a printed product to acquire imaging data of the captured image, and a determination device that determines, based on the imaging data acquired by the imaging data acquisition device, a printing method used to produce the printed surface of the printed product for which the image is captured by the imaging data acquisition device. The determination device selects a plurality of determination areas included in the captured image from the imaging data acquired by the imaging data acquisition device, acquires determination data based on a line-segment image included in each of the selected plurality of determination areas, compares the acquired determination data between two determination areas, and acquires, based on a result of the comparison, a determination value for determining a printing method used to produce the printed surface of the printed product, and determines, based on the acquired determination value, a printing method used to produce the printed surface of the printed product.