Document Detecting Device Position Angle Size Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing document detection systems in copying machines face inaccuracies due to incorrect document size input and misalignment, leading to suboptimal image reading, especially when the document position and size do not match the designated surface area.
Innovation Solution
A document detecting device comprising a glass plate, a camera, and a controller that captures images of the document and determines its position, angle, and size using pre-stored fixed-size information, allowing for accurate detection and alignment, even when the document is not positioned correctly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the reading device uses a fixed surface area designated by a movable range of a reading unit, then the device structure is simple and easy to operate, but the reading accuracy deteriorates when the document position or size does not match the designated surface area
Solution Approach 1:
The imaging device captures an image of the document before the reading process begins. The controller then analyzes this preliminary image to detect the document's actual position and size, and adjusts the reading parameters accordingly. This preliminary detection action enables accurate reading even when the document is not perfectly positioned.
Solution Approach 2:
The patent replaces the mechanical approach of precisely positioning the document with a fixed reading area with an optical-detection-based approach. The imaging device captures the document image, and the controller automatically determines the reading area based on detected document features, eliminating the need for manual positioning precision.
2Reliability
If the reading device reads the entire designated surface area, then all possible document positions are covered, but power consumption increases and reading efficiency decreases
Solution Approach 1:
The controller extracts only the necessary reading area from the entire designated surface area by detecting the document's actual position and size. Instead of reading the full predefined area, the system reads only the region containing the document, reducing power consumption and improving efficiency while maintaining complete document coverage.
Solution Approach 2:
The system performs partial reading by limiting the reading operation to the detected document boundaries rather than the entire designated surface area. This partial action approach reads only what is necessary, reducing energy consumption while ensuring complete document capture.
3Device complexity
If the reading device relies on user input for document size information, then the device structure remains simple, but reading accuracy deteriorates when users input incorrect information
Solution Approach 1:
The imaging device and controller automatically detect the document's position and size by analyzing the captured image. The system serves itself by eliminating the need for manual user input, automatically determining reading parameters from the visual information, thereby improving accuracy without significantly increasing device complexity.
Data Source
AI summary
Certain embodiments provide a document detecting device, including: a plate having an upper surface on which a document is placed; an imaging device that includes the upper surface in a photographing visual field range; and a controller that detects any one or more of a position, an angle, and a size of the document on the upper surface according to an image by the imaging device and fixed-size information of the document stored in advance.