Document Scanner Dynamic Light Adjustment for Edge Precision
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Solution Overview
Problem
Current document scanners struggle to precisely define document edges, holes, or contours due to their reliance on user settings or predetermined size settings, which limits the accuracy of document detection and image acquisition.
Innovation Solution
A document scanner with a dynamic adjusting function, equipped with a document detector, a penetrating light source, an image sensor, and a controller, which detects the transmission rate of a document and adjusts the light-emitting amount of the penetrating light source accordingly to optimize image acquisition and processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If user settings or predetermined size settings are used to define document edges, then the scanning process is simple and fast, but the precision of edge definition is insufficient
Solution Approach 1:
The document detector performs preliminary detection of document transmission rate before the main scanning process. This preliminary action provides advance information about document properties, enabling the system to prepare appropriate scanning parameters and achieve precise edge definition without adding complex post-processing steps.
Solution Approach 2:
The system uses the transmission rate signal from the document detector as feedback to dynamically adjust the light-emitting amount of the penetrating light source. This feedback mechanism allows the system to adapt to different document types and achieve precise edge definition automatically, reducing the need for complex manual settings while improving measurement precision.
2Reliability
If a fixed light-emitting amount is used for the penetrating light source, then the device operation is simple, but the scan results cannot be optimized for different document properties
Solution Approach 1:
The light-emitting amount of the penetrating light source is made dynamic rather than fixed. The controller adjusts the light-emitting amount based on the transmission rate signal from the document detector, allowing the system to adapt to different document properties (such as thickness, material, density) and optimize scan results for each specific document without requiring complex manual intervention.
Solution Approach 2:
The system changes the light-emitting amount parameter dynamically based on detected document properties. By adjusting this key parameter according to the transmission rate signal, the system optimizes the penetration of light through different document types, improving image quality and scan result reliability without adding significant system complexity.
3Measurement precision
If dynamic adjustment of light-emitting amount is implemented, then scan results are optimized, but the device complexity increases
Solution Approach 1:
The document detector serves multiple functions: it detects document presence, determines transmission rate, and provides signals for light source adjustment. This multi-functionality reduces the need for separate detection systems, allowing the system to achieve precise contour detection while minimizing the increase in overall device complexity through shared components.
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
The dynamic adjustment of the light-emitting amount based on detected document properties enhances the precision of edge detection, hole definition, and contour recognition, leading to improved scan results and easier image processing.
Implementation Method 1
The penetrating light source outputs original penetrating light, which penetrates through the document and becomes to-be-detected penetrating light
Implementation Method 2
The document detector detects a transmission rate of the document, and outputs a transmission rate signal
Data Source
AI summary
A document scanner with a dynamic adjusting function includes a document detector, a penetrating light source, an image sensor and a controller. The document detector detects a transmission rate of a document, and outputs a transmission rate signal. The penetrating light source outputs original penetrating light, which penetrates through the document and becomes to-be-detected penetrating light. The image sensor receives the to-be-detected penetrating light and generates an image signal. The controller, electrically connected to the document detector, the penetrating light source and the image sensor, controls the penetrating light source to output a light-emitting amount of the original penetrating light according to the transmission rate signal. Thus, different light-emitting amounts of penetrating light for scanning can be provided according to documents with different transmission rates.