Image Processing Apparatus Sensor Attachment Error Correction
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Solution Overview
Problem
When reading large original images using multiple sensor units, it is challenging to correct attachment errors and tilt of the original placement, leading to difficulties in joint processing of image data due to the variability in sensor unit positions and angles.
Innovation Solution
An image processing apparatus that includes a storage unit for attachment position information, a joint correction unit for correcting attachment errors, and a tilt correction unit for correcting the original's tilt, allowing for accurate image data generation by transforming coordinate systems and interpolating pixel values across sensor units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple sensor units are used to read large original images, then the reading capability is improved, but the difficulty of correcting attachment errors and performing joint processing increases
Solution Approach 1:
The patent performs attachment error correction for each sensor unit before joint processing. By pre-correcting the image data from each sensor unit using its specific attachment error parameters, the system simplifies the subsequent joint processing step, making it feasible to handle multiple sensor units effectively
Solution Approach 2:
The patent divides the correction process into separate stages: first correcting attachment errors for each sensor unit individually, then performing joint processing on the corrected data. This segmentation of the correction process makes the overall system manageable despite using multiple sensor units
2Measurement precision
If attachment error correction is performed for each sensor unit, then the image data accuracy is improved, but the processing time and complexity increase
Solution Approach 1:
The attachment error correction is performed as a preliminary step before joint processing. By correcting each sensor unit's data in advance using pre-determined attachment error parameters, the system achieves high accuracy without significantly increasing overall processing time, as the correction uses straightforward parameter application rather than complex real-time calculations
3Adaptability or versatility
If tilt correction is performed after joint processing, then the original placement flexibility is improved, but the processing complexity increases
Solution Approach 1:
The patent separates tilt correction from joint processing, performing tilt correction as a distinct final step after joint processing is complete. This segmentation allows the system to handle tilted originals by applying tilt correction parameters to the already-jointed image data, maintaining flexibility while managing complexity through staged processing
Data Source
AI summary
Based on attachment position information of each of a plurality of sensor units, which reads an image in each area obtained by dividing the area of an original in a sub-scanning direction, image data output from the sensor unit undergoes attachment error correction of correcting the attachment error of the sensor unit. Image data output from the plurality of sensor units then undergo joint processing. Based on the placement information of the original, tilt correction of correcting the tilt of the original is performed for the image data having undergone the joint processing.