Optical Mouse Sensor Positioning for Compact Image Capture
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Solution Overview
Problem
Conventional image capture devices, such as handy scanners, are bulky due to the need for a positioning wheel, making them unsuitable for portable use and requiring a larger volume for image capturing.
Innovation Solution
The use of a line image sensor for capturing images and an optical mouse sensor for counting and positioning, which reduces the overall volume of the device and optimizes capturing performance through a motion algorithm that determines the most effective temporary images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a positioning wheel is used to define the coordinate system in handy scanners, then positioning accuracy is improved, but the volume of the device increases
Solution Approach 1:
The patent replaces the mechanical positioning wheel with an optical mouse sensor that uses optical fields to detect movement and determine coordinates. This substitution eliminates the need for mechanical components, significantly reducing device volume while maintaining positioning accuracy through optical field interactions with the document surface.
Solution Approach 2:
The optical mouse sensor performs multiple functions: it defines the coordinate system, tracks device movement, and determines image capture positions. By consolidating these functions into a single component, the patent reduces the number of parts needed and minimizes device volume while preserving positioning capabilities.
2Manufacturing precision
If multiple temporary images are captured for synthesis, then image quality is improved, but the capturing time increases
Solution Approach 1:
The patent employs feedback mechanisms where the optical mouse sensor continuously provides position information during the capture process. This real-time feedback allows the system to adjust capture parameters dynamically, determine when sufficient temporary images have been captured, and proceed to synthesis, thereby optimizing the balance between image quality and capturing time.
Solution Approach 2:
The system performs preliminary actions by pre-determining the number and positions of temporary images to be captured based on the document characteristics and desired output quality. This preliminary planning allows for efficient capture sequences that minimize redundant captures while ensuring sufficient data for high-quality synthesis.
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 miniaturizes the image capture device while enhancing capturing performance by effectively employing the optical mouse sensor's properties and reducing its limitations, allowing for efficient image synthesis.
Implementation Method 1
an optical mouse sensor to achieve the counting and positioning purposes
Implementation Method 2
a line image sensor to capture images
Data Source
AI summary
An image capture method includes the following steps. Firstly, an image capturing device including a line image sensor and an optical mouse sensor is provided. Then, an image capturing resolution is provided. Then, the optical mouse sensor starts counting, and the image capturing device is moved along a specified direction. Then, a sampling target value along the specified direction is acquired. Then, the line image sensor acquires at least one temporary image. Then, each temporary image is correlated with a temporary target value according to a counting result of the optical mouse sensor. Then, an absolute value of each temporary target value minus the sampling target value is calculated, and the temporary image corresponding to the minimum absolute value is determined as a to-be-synthesized image. Consequently, the overall volume of the image capturing device is reduced, and the capturing performance is optimized.