Image Forming Apparatus Periodic Defect Detection Job Interruption
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Solution Overview
Problem
Existing image diagnosis techniques struggle to determine the presence or absence of periodic image defects across multiple scanned images when a print job is interrupted, such as due to paper jamming.
Innovation Solution
An image processing apparatus that acquires data from scanned images, detects periodic image defects, identifies the component causing the defect, and resumes forming pattern images from the beginning of the job in case of interruptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the chart print job is interrupted due to paper jamming, then the productivity is reduced and the diagnosis process is delayed, but continuing the job from the interruption point loses the continuity of rotation part rotation which is necessary for detecting periodic image defects
Solution Approach 1:
The system performs preliminary actions by resetting the rotation part to its initial position and re-executing the chart print job from the beginning after an interruption. This ensures that the continuity of rotation part rotation is maintained, allowing accurate detection of periodic image defects while still recovering from the interruption efficiently
2Loss of time
If the chart print job is resumed from the interruption point, then the loss of time is reduced, but the continuity of rotation part rotation is broken which prevents accurate determination of periodic image defects
Solution Approach 1:
The system maintains the continuity of useful action by ensuring that the rotation part completes its full rotational cycle without interruption during the chart print job. When an interruption occurs, the system resets and re-executes from the beginning rather than resuming mid-cycle, preserving the continuous rotational motion necessary for accurate periodic defect detection
Data Source
AI summary
Even in a case where a print job is interrupted, whether there is a periodic image defect over a plurality of scanned images is determined. An image forming apparatus according to the present disclosure acquires data on a scanned image obtained by reading a printing material on which a pattern image is formed, detects a periodic image defect from the data, identifies a component of an image forming apparatus that has caused the image defect based on a period of the detected image defect, and in a case where a job of forming the pattern image on a plurality of printing materials is interrupted, resumes forming the pattern image from the beginning of the job.