Flatbed Scanner Motion Control Pattern for Backtrack Artifact Elimination
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Solution Overview
Problem
Conventional flatbed scanners experience scanning errors and backtrack artifacts due to mechanical positional tolerances during backtracking operations, leading to image data duplication or omission.
Innovation Solution
A method that includes real-time or post-processing analysis using a motion control pattern with angled marks to accurately synchronize the scanbar position, preventing backtrack artifacts by comparing new data points to previously acquired data and resuming scanning at the last valid position, accounting for mechanical positional tolerance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the scanbar backtracks when the memory buffer is full, then the scanning operation can resume, but mechanical positional tolerances cause location errors and backtrack artifacts
Solution Approach 1:
The system continuously monitors the memory buffer fill level and uses this feedback to control scanbar operations. When the buffer reaches a threshold, the system triggers a backtrack operation and then waits for buffer clearance before resuming scanning, creating a closed-loop control system that prevents data loss while managing positioning errors through controlled interruptions
Solution Approach 2:
The system performs a backtrack operation in advance before the buffer becomes completely full, creating a safety margin. By triggering the backtrack when the buffer reaches a threshold level rather than waiting for it to be completely full, the system proactively prevents potential data loss and allows for smooth resumption of scanning
2Reliability
If the scanbar stops and reverses direction to empty the buffer, then data loss is prevented, but scanning time is lost and image quality deteriorates due to artifacts
Solution Approach 1:
The scanning operation is divided into periodic cycles of data acquisition followed by buffer monitoring and conditional backtrack operations. This rhythmic pattern of scanning, checking buffer status, and performing maintenance backtracks when needed creates a sustainable operating cycle that maintains data completeness while minimizing interruptions to the overall scanning process
Data Source
AI summary
A method of scanning a target image and inhibiting backtrack artifacts from the scanned image comprises the steps of initiating a scan on a flat bed scanner, the flat bed scanner comprising at least a scanbar, a memory buffer and a motion control pattern comprised of a plurality of spaced elements, each element having an angled portion with respect to the motion of the scanbar; acquiring scan data comprising a motion control pattern data and an image data with said scanbar; storing the previously acquired scan data in a memory buffer; querying whether the memory buffer reaches a preselected full threshold; acquiring a last valid scan data; stopping and backtracking the scanbar when the memory buffer preselected full threshold is met; and, inhibiting backtrack artifacts by one of a first real-time position analysis or a post-processing analysis.