Image Processing Apparatus Contour Vertex Document Separation
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Solution Overview
Problem
Conventional image processing apparatuses struggle to separate overlapping original documents during multi-cropping processing, often cutting them as a single document.
Innovation Solution
An image processing apparatus that extracts contour lines from scanned images, calculates vertices to identify document areas, and generates separate files for each document by forming rectangles from adjacent vertices, while deleting contained rectangles and calculating overlap to manage overlapping documents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional multi-cropping processing is used to scan multiple documents at once, then scanning efficiency is improved, but overlapping documents cannot be separated and are cut out as a single document
Solution Approach 1:
The patent segments the scanned image into multiple document regions by detecting contour lines and identifying vertices. The processor divides the image data based on geometric features (vertices forming rectangles) to separate overlapping documents, enabling each document to be extracted as an independent region even when they overlap in the scanned image.
2Measurement precision
If vertex extraction based on curvature calculation is implemented to identify document corners, then document area identification is improved, but processing complexity increases
Solution Approach 1:
The patent replaces complex mechanical or manual document separation methods with automated image processing algorithms. By using curvature calculation and geometric pattern recognition (identifying vertices that form rectangles), the system automatically separates documents without requiring manual intervention or complex physical mechanisms.
3Manufacturing precision
If rectangles are formed from vertices to define document boundaries, then document extraction accuracy is improved, but false detection of contained rectangles increases
Solution Approach 1:
The patent performs preliminary actions by first detecting all potential vertices and forming candidate rectangles before final document identification. The system pre-processes the image data to identify geometric features, then uses these features to define document boundaries, ensuring accurate extraction while maintaining reliability through systematic verification of rectangle formation.
Data Source
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AI summary
An image processing apparatus comprises an interface through which scanned image data obtained by scanning a designated region, is acquired, and a processor. The processor extracts a contour line representing a document area from the scanned image data, extracts vertices of the contour line, determines whether a plurality of original documents is present in the document area based on the vertices, extracts document image data of each original document from the scanned image data, and generates a plurality of files, each of the files including document image data for one of the original documents.