Dynamic Image Inspection for Printing Ejection Variations
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Solution Overview
Problem
Existing image processing methods for inspecting printing failures on printing media are inefficient due to variations in printing characteristics, as they do not adequately account for changes in ink ejection states from printing elements, leading to incomplete or inaccurate inspections.
Innovation Solution
An image processing apparatus that includes a printing unit, an obtaining unit to monitor ink state, a determination unit to select inspection items based on ink state information, and an inspection unit to evaluate printing failures, allowing for targeted inspection of printing failures caused by variations in ink ejection from the printing head.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all inspection items are executed on a printed image, then inspection completeness is improved, but processing time increases enormously
Solution Approach 1:
The patent changes the parameter of inspection item selection from fixed to dynamic based on ink ejection state. The determination unit selects which inspection items to execute by evaluating the actual ink ejection state obtained by the obtaining unit, thereby adapting the inspection scope to current printing conditions to balance completeness and efficiency
Solution Approach 2:
The patent introduces dynamics into the inspection process by making inspection item selection adaptive rather than static. The system continuously monitors ink ejection state and dynamically adjusts which inspection items are executed, allowing the inspection strategy to evolve based on real-time printing conditions
2Productivity
If inspection is based only on input information characteristics, then processing efficiency is improved, but detection accuracy of printing failures deteriorates
Solution Approach 1:
The patent implements feedback by having the obtaining unit monitor the actual ink ejection state and feed this information back to the determination unit. This closed-loop approach allows the inspection process to be adjusted based on actual printing conditions rather than relying solely on predetermined input information characteristics
Solution Approach 2:
The patent performs preliminary action by obtaining and evaluating ink ejection state information before selecting inspection items. This advance preparation allows the system to proactively adjust the inspection strategy based on current printing conditions, improving detection accuracy before the actual inspection occurs
Data Source
AI summary
Because the ejection state of a printing element in a printing apparatus may vary at all times, an inspection item for inspecting a printed image may be set in consideration of the ejection state of the printing element. An inspection item for inspecting a printed image may be set based on information including a temperature characteristic of a printing head and a state of ink such as an elapsed time from the last ejection. This allows image inspection that matches with variations in the ejection state of the printing element.