Document Tilt Detection Method Selection for Image Scanners
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Solution Overview
Problem
Conventional image-reading technologies face challenges in accurately detecting the tilt and position of documents with varying types and shapes, such as stitched or cut-out documents, due to distortion and irregularities during the scanning process.
Innovation Solution
An image-reading apparatus and method that determines the type and shape of a document and selects appropriate tilt and position detection methods, using a document determining unit to detect the tilt and position by employing specific detection methods based on the document's characteristics, such as prioritizing stable sides or using straight lines for detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional document area detection methods are used, then the detection process is simple, but the accuracy of detecting tilt and position is insufficient for various document types and shapes
Solution Approach 1:
The patent applies parameter changes by switching between different detection methods based on document characteristics. The system changes the detection parameters (method selection) according to the determined document type and shape, thereby achieving high accuracy for various documents without requiring a single complex method for all cases
Solution Approach 2:
The patent segments the detection process into multiple stages: first determining document type and shape, then selecting appropriate detection methods based on those characteristics. This segmentation allows the system to handle different document types with specialized methods, improving overall accuracy while managing complexity through structured processing
2Adaptability or versatility
If a single detection method is used for all documents, then the detection process is simple, but it cannot handle various document types and shapes effectively
Solution Approach 1:
The patent implements dynamics by making the detection method selection adaptive rather than fixed. The system dynamically chooses detection methods based on real-time determination of document type and shape characteristics, enabling versatile handling of various documents while maintaining a manageable system structure through conditional logic
Solution Approach 2:
The patent achieves universality by creating a detection system that can handle multiple document types and shapes through a unified framework. The system determines document characteristics and selects from multiple detection methods, making the overall system versatile for various documents while avoiding the need for separate specialized systems for each document type
Data Source
AI summary
According to the present embodiment, an image-reading apparatus determines any one or both of the type of document and the shape of a document, selects any one or both of an appropriate document tilt detection method and an appropriate document position detection method according to any one or both of the determined type of document and the determined shape of a document, and detects any one or both of the tilt of the document and the position of the document by the selected detection method.