Image Reading Device Line-Scan Resolution Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing image reading devices face a reduction in reading resolution due to the intermittent illumination and imaging process, which affects the quality of captured images.
Innovation Solution
The method involves generating multiple line-shaped images of an imaging target by imaging N line-shaped regions arranged in parallel and spaced apart, and then arranging these images in ascending order to create a read image, ensuring that consecutive images do not overlap and maintaining high resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a lamp is driven to blink in synchronization with a line synchronization signal to shorten the exposure period, then resolution reduction is prevented, but reading resolution is still reduced
Solution Approach 1:
The imaging process is divided into multiple separate imaging operations. Instead of attempting to capture the entire imaging target in a single continuous exposure, the system performs multiple imaging operations at different conveyance positions, each capturing a portion of the target. This segmentation allows each individual imaging operation to maintain high resolution while the composite result covers the entire target area.
Solution Approach 2:
The system performs preliminary imaging operations at specific conveyance positions before the complete imaging target is fully conveyed into position. By capturing images at predetermined intervals during the conveyance process, the system ensures that each captured portion is imaged at optimal resolution before moving to the next position, preventing resolution loss that would occur with continuous imaging.
2Measurement precision
If multiple line-shaped images are arranged in ascending order to create a read image, then reading resolution is maintained, but device complexity increases
Solution Approach 1:
The system creates simplified representations (line-shaped images) of the imaging target at different conveyance positions. Each line-shaped image captures essential information from a specific portion of the target. These simplified copies are then easily assembled into the final read image, reducing the complexity of handling and processing the complete high-resolution image data.
Solution Approach 2:
The system transitions from attempting to capture the entire two-dimensional imaging target in a single operation to capturing one-dimensional line-shaped images at multiple positions along the conveyance direction. This dimensional reduction simplifies each individual imaging operation and the subsequent assembly process, while the multiple positions along the conveyance axis provide the necessary information to reconstruct the complete image.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach effectively prevents a reduction in reading resolution by ensuring that line-shaped images are adjacent and non-overlapping, resulting in a higher quality read image with improved clarity.
Implementation Method 1
imaging the N line-shaped regions extending in a direction perpendicular to the conveying direction
Data Source
AI summary
The present invention provides a control method of an image reading device, an image reading device, and a non-transitory computer-readable medium having a program stored thereon, which avoid a reduction in reading resolution. The control method of the image reading device includes: a first step (ST101) of generating N line-shaped images indicating N line-shaped regions (W11) in an imaging target (T1) being conveyed in a conveying direction (X1) by imaging the N line-shaped regions (W11) extending in a direction perpendicular to the conveying direction (X1); a second step (ST102) of performing the same step as the first step (ST101) at a point in time when the imaging target (T1) is conveyed by an amount associated to a width (11a) of N−1 line-shaped regions; and a step (ST103) of generating a read image by arranging the N line-shaped images generated in each of the steps in ascending order.