Image Reading Device Composite Pattern Detection
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Solution Overview
Problem
Existing image reading devices require multiple processing units to determine if a document is specific, leading to increased circuit size, complexity, and cost, as well as longer processing times due to the need to read and process both sides of a document separately.
Innovation Solution
An image reading device that feeds a document along a predetermined path, reads both sides, and synthesizes the images to create a composite image, allowing a single processing unit to detect characteristic patterns embedded in the document, thereby reducing processing time and eliminating the need for multiple units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple processing units are used to determine specific documents on both obverse and back sides, then determination accuracy is improved, but device complexity and circuit size increase
Solution Approach 1:
The patent merges the determination processing for both obverse and back sides into a single processing unit. The image processing device reads both sides of the document, creates composite image data by combining the read images, and then uses one determination processing unit to analyze the composite data. This eliminates the need for separate processing units for each side, reducing device complexity while maintaining determination accuracy.
Solution Approach 2:
The single processing unit is designed to handle determination processing for both obverse and back sides of documents universally. Rather than having dedicated processing units for each side, the system uses one multi-functional processing unit that can analyze composite image data from either side, making the device more versatile and less complex.
2Reliability
If two processing units are used for specific document determination on obverse and back sides, then determination capability is improved, but manufacturing cost increases
Solution Approach 1:
The patent combines the determination processing functionality for both document sides into a single processing unit that analyzes composite image data. This merger reduces the total number of processing units required from two to one, directly lowering manufacturing costs while preserving the capability to determine whether either side of the document is a specific document type.
3Speed
If images are compressed into half size and linked, then processing speed is improved, but the number of blocks to read remains the same
Solution Approach 1:
The patent creates composite image data by combining image data from both obverse and back sides in a new dimensional arrangement. Instead of simply compressing images in the main scanning direction, the system overlays or adjacent-arranges the images to form a composite structure that contains characteristic patterns from both sides, enabling simultaneous detection without increasing block reading requirements.
Data Source
AI summary
An image reading device comprises: a feeder that feeds a document along with a predetermined path; a first reading part that reads a first side of the document at a first position in the path and creates a first image; a second reading part that reads a second side of the document at a second position which is located posterior to the first position in the path and creates a second image; a synthesizing part that lays the first image and the second image on top of one another and creates a composite image; and a detecting part that detects a characteristic pattern of a specific document from the composite image created by the synthesizing part.