Printing System Page Verification via Extracted Comparison Data
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Solution Overview
Problem
Existing printing systems face challenges in efficiently confirming whether each page of a document has been printed, particularly when using formats like PDL, where adding serial numbers or two-dimensional codes is inconvenient, and existing methods require high-speed information processing or image generation, leading to increased data amounts and processing loads.
Innovation Solution
A printing system that records unique characters or images on each page as comparison data with position information and compares this data with the printed image data to determine page completion, using optical character recognition (OCR) when necessary, thereby reducing the processing load by comparing a smaller amount of data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the entire page image data is compared to confirm printing, then printing confirmation accuracy is improved, but processing load increases significantly
Solution Approach 1:
The patent extracts only the necessary comparison data (characters or images at specific positions) from the entire page, rather than processing the complete page image. This extraction approach allows the system to verify printing status by analyzing only the critical elements needed for confirmation, thereby reducing processing load while maintaining accuracy.
Solution Approach 2:
The patent divides the page into multiple regions and selects specific comparison data from predetermined positions. By segmenting the page content and focusing only on specific segments for comparison, the system achieves efficient printing confirmation without processing the entire page, thus balancing accuracy with processing efficiency.
2Reliability
If serial numbers or two-dimensional codes are added to each page for confirmation, then page verification reliability is improved, but device complexity increases
Solution Approach 1:
The patent enables the printing system to verify its own output by using the printed content itself as comparison data. The system extracts characters or images from the printed page and compares them with the original data, allowing the system to self-verify printing status without requiring external identification markers or complex additional hardware.
Solution Approach 2:
The patent makes the printing system multi-functional by enabling it to both print documents and verify printing status using the same hardware and software components. The system can extract comparison data from the printed output and perform verification without requiring separate dedicated verification devices, thus reducing overall system complexity.
3Ease of operation
If existing printing systems are used without modification, then ease of operation is maintained, but adaptability to different data formats decreases
Solution Approach 1:
The patent changes the parameters of the printing system by enabling it to handle multiple data formats (including PDL formats like PostScript) while maintaining ease of operation. The system can extract comparison data from various formats and perform verification without requiring users to change their workflow, thus achieving both format compatibility and operational simplicity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method allows for accurate detection of missing pages with reduced misjudgment due to dust or image quality issues, ensuring each page is confirmed printed with a relatively small processing load, even when print data is in formats like PDL.
Implementation Method 1
using optical character recognition (OCR) when necessary
Data Source
Figure 1(a)~1(c)
Figure 2A~2C
Figure 3
AI summary
A printing system (100) includes an input unit (12), a comparison data acquisition unit (14), an image acquisition unit (15), and an output unit (17). The input unit (12) acquires print data of a plurality of pages. The comparison data acquisition unit (14) extracts comparison data from the print data for each page. The image acquisition unit (15) from first image data read from a printed material on which the print data is printed, acquires second image data at a position corresponding to the comparison data, for each page of the printed material. The output unit (17) outputs a comparison result of the comparison data and the read image data for each page.