Abnormality Highlighting Before Correction in Image Inspection
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Solution Overview
Problem
Existing techniques for determining image defects in printed materials do not effectively account for deviations caused by the conveyance of recording media, leading to inaccuracies in identifying and highlighting defective areas.
Innovation Solution
An information processing apparatus that acquires read image data and output target image data, generates inspection image data, and compares corrected read image data with inspection image data to detect image abnormalities, highlighting the position of defects based on conveyance deviations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If read image data is compared directly with inspection image data without correction, then the inspection process is simple and fast, but the accuracy of defect detection deteriorates due to conveyance deviations
Solution Approach 1:
The patent applies preliminary action by performing correction processing on the read image data before comparing it with the inspection image data. The correction unit corrects the read image data based on the amount of deviation caused by conveyance of the recording medium, so that the comparison is made between corrected and uncorrected images, thereby improving defect detection accuracy while maintaining a relatively simple overall process
Solution Approach 2:
The patent introduces an intermediary element - the correction unit - that acts as a mediator between the read image data and the inspection image data. This correction unit processes the read image data by applying the deviation amount as a correction factor, creating a corrected intermediate image that can be accurately compared with the original inspection image data
2Measurement precision
If the position of image abnormality is highlighted in the corrected read image data, then the detected abnormality position is accurate relative to the inspection image, but the highlighted position does not correspond to the actual position in the original read image
Solution Approach 1:
The patent applies self-service by having the highlighting unit automatically adjust the highlighted position based on the deviation amount. Instead of simply highlighting the position in the corrected image, the system self-corrects the position information by applying the inverse of the deviation amount, so that the highlight automatically appears at the correct position in the original read image data without manual intervention
Solution Approach 2:
The patent changes the position parameter dynamically by applying the deviation amount as a correction factor. The highlighting unit modifies the position coordinates of the abnormality by applying the deviation parameter, transforming the position from the corrected image coordinate system back to the original read image coordinate system, thereby maintaining correspondence between the highlighted position and the actual defect location
Data Source
AI summary
An information processing apparatus includes circuitry. The circuitry is configured to acquire read image data of an image formed on a recording medium. The circuitry is configured to acquire output target image data according to which the image is formed. The circuitry is configured to generate, based on the output target image data, inspection image data for inspection of the read image data. The circuitry is configured to compare the read image data corrected based on an amount of deviation caused by conveyance of the recording medium with the inspection image data generated, to detect an image abnormality. The circuitry is configured to highlight and output a position of a portion of the image abnormality in the read image data before correction, based on the amount of deviation caused by conveyance of the recording medium, in response to the image abnormality being detected.