Line Camera Scanning Offset Compensation for Variable Speed
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing line camera scanning systems are limited in their ability to vary scanning speed relative to the document, restricting the flexibility in achieving high resolution with low throughput or low resolution with high throughput, as they can only operate at specific predetermined speeds to maintain image quality.
Innovation Solution
A method and device that utilize a line camera with at least two parallel scan lines, allowing for freely selectable scanning speed by shifting and interpolating images to align them accurately, using the formula D=vt·tzM to calculate image spacing and interpolating image lines by the decimal place content of the offset Z, ensuring high-quality overall images regardless of scanning speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the scanning speed is increased to achieve high throughput, then productivity is improved, but the ability to maintain high resolution is worsened
Solution Approach 1:
The patent implements dynamic adjustment of scanning parameters by allowing continuous variation of scanning speed while maintaining image quality through real-time calculation and adjustment of the offset compensation amount based on the actual scanning speed and document movement, enabling the system to adapt between high throughput and high resolution requirements
Solution Approach 2:
The patent changes the parameter of offset compensation from fixed discrete values to continuously adjustable values calculated based on scanning speed and document movement, allowing the system to maintain manufacturing precision across a continuous range of productivity levels rather than being constrained to specific predetermined speeds
2Manufacturing precision
If the scanning speed is fixed at predetermined values to maintain image quality, then manufacturing precision is improved, but adaptability is worsened
Solution Approach 1:
The patent transforms the static offset compensation approach into a dynamic system that continuously adapts to varying scanning speeds and document movement conditions, allowing the scanner to maintain image quality across a continuous spectrum of speeds rather than being limited to discrete predetermined values
Solution Approach 2:
The patent enables continuous adjustment of the offset compensation parameter based on actual scanning conditions, allowing the system to maintain manufacturing precision while achieving full adaptability in speed variation through mathematical calculation rather than mechanical constraints
3Device complexity
If discrete offset compensation values are used to align scan lines, then device complexity is reduced, but adaptability is worsened
Solution Approach 1:
The patent replaces the mechanical approach of discrete offset compensation with a computational method that calculates continuous offset values based on scanning speed and document movement, eliminating the need for complex mechanical adjustment mechanisms while achieving full adaptability
Solution Approach 2:
The patent changes the offset compensation from a discrete mechanical parameter to a continuous computational parameter, allowing the system to maintain simplicity while achieving unlimited adaptability through mathematical calculation of the optimal offset value for any scanning condition
Data Source
AI summary
The invention relates to a method and a device for the scanning of a document by means of a line camera which has several scan lines and therefore generates several images independent of one another. Due to the spacing of the separate scan lines, these images are offset relative to one another. This offset also depends on the speed at which the line camera is moved relative to the document. According to the invention the separate images are brought into congruence by being shifted towards one another according to the whole-number content of Z, with at least one of the images being interpolated into the other image in accordance with the decimal place content of Z. The method according to the invention may be used to scan a document at a freely selectable scanning speed. The device according to the invention may be inserted as a module in an existing scanner.