Image Reading Apparatus Inclination Correction Logic
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Solution Overview
Problem
Existing image reading apparatuses face issues with inclined original images due to assembly accuracy and manufacturing errors, leading to incomplete output images when the inclination exceeds the maximum correction angle, resulting in increased data size and processing time.
Innovation Solution
An image reading apparatus that determines the inclination angle of the original's leading edge and rotationally corrects the image to fit within standard sizes, either by reducing the image size when the inclination is within the maximum correction angle or by maintaining a size larger than the original when the inclination exceeds the maximum angle to prevent missing edges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the maximum correction angle is set to correct large inclination amounts, then the original image can be fully captured, but the output image includes large areas outside the original image, increasing data size
Solution Approach 1:
The patent dynamically changes the correction angle parameter based on the detected inclination amount. When the inclination amount is within the maximum correction angle, the full correction angle is applied. When it exceeds the maximum correction angle, the correction angle is limited to the maximum correction angle. This parameter adaptation resolves the contradiction by optimizing the balance between correction accuracy and data size reduction.
2Quantity of substance
If the maximum correction angle is limited to avoid memory capacity issues, then data size is reduced, but portions of the original image are lost when inclination exceeds the maximum correction angle
Solution Approach 1:
The patent applies partial correction action by limiting the correction angle to the maximum correction angle when the inclination amount exceeds this limit. This partial action prevents memory overflow while accepting that some edge portions may be lost, resolving the contradiction between data size management and image completeness.
3Manufacturing precision
If the output image size is increased to one step larger than the original to prevent missing edges, then image completeness is maintained, but processing time and storage capacity increase
Solution Approach 1:
The patent changes the output image size parameter dynamically based on the inclination amount. When inclination is within the maximum correction angle, the output size matches the original size. When inclination exceeds the maximum correction angle, the output size is increased to one step larger. This parameter adaptation resolves the contradiction by optimizing processing efficiency while maintaining image completeness when necessary.
Data Source
AI summary
An image reading apparatus includes a conveyor configured to convey an original in a conveyance direction; a reader configured to read an image of the original conveyed by the conveyor; and at least one processor configured to: determine, based on the image read by the reader, an inclination amount corresponding to an inclination angle of a side of a leading edge of the original in the conveyance direction, wherein the inclination angle represents an inclination of the side of the leading edge of the original with respect to a width direction orthogonal to the conveyance direction; rotationally correct the image read by the reader by the inclination amount so as to reduce the inclination amount to output a first image in which the rotationally corrected image is included in a case where the inclination amount is smaller than a predetermined amount.