Dual-Scanner Image Reading Device Alignment Correction
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Solution Overview
Problem
Existing image reading devices face challenges in accurately aligning and correcting the size of images on both sides of a recording medium due to magnification differences between scanners, leading to misalignment and variation in image size.
Innovation Solution
The implementation of a novel image reading device with two scanners and circuitry that generates and applies correction values to align images on both sides of a recording medium, using a first correction value calculated based on the ratio of dimensions read by each scanner and a second correction value input to account for magnification differences, ensuring precise alignment and size consistency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If images are read by two separate scanners to enable dual-side reading, then reading capability is improved, but misalignment and size variation between images occur due to magnification differences
Solution Approach 1:
A correction value calculation unit is introduced as an intermediary component between the two scanners. This unit calculates correction values based on the magnification differences detected by each scanner, and applies these corrections to align the images from both sides, thereby resolving the misalignment issue while maintaining dual-side reading capability
Solution Approach 2:
The system changes the magnification parameter by calculating and applying correction values to compensate for the magnification differences between the two scanners. By adjusting the image parameters (size and position) based on measured correction values, the system achieves precise alignment despite using separate scanners with inherent magnification variations
2Manufacturing precision
If correction values are applied to align images, then alignment precision is improved, but device complexity increases due to additional correction mechanisms
Solution Approach 1:
The system performs self-correction by automatically calculating correction values based on the magnification differences detected during the reading process. The correction values are computed and applied within the same device that performs the reading, eliminating the need for external alignment equipment or complex mechanical adjustment mechanisms
Solution Approach 2:
The patent replaces complex mechanical alignment systems with a computational approach. Instead of using mechanical adjustments to physically align the scanners or their outputs, the system uses software-based correction values to digitally align the images, thereby reducing mechanical complexity while maintaining high precision
Data Source
AI summary
An image reading device includes a first scanner, a second scanner, and circuitry. The first scanner is configured to read a first side of a recording medium. The second scanner is configured to read a second side of the recording medium. The circuitry is configured to generate a first correction value to correct misalignment between the first side and the second side. The circuitry is configured to input a second correction value. The circuitry is configured to correct an image based on the first correction value and the second correction value.