Document Size Detection Using Sheet Reference for Copying
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Document size sensors in copying apparatuses are inaccurate for special document sizes, leading to incorrect determination of document size and reading range, resulting in shifted printing ranges during copying operations.
Innovation Solution
An image processing apparatus with a detecting unit for document size, an obtaining unit for sheet size, and a controller that adjusts the reading region based on detected document or sheet sizes, ensuring appropriate printing even for sizes not recognized by document size sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If document size sensors are used to automatically determine document size, then copying operation automation is improved, but measurement precision deteriorates for special document sizes
Solution Approach 1:
The patent introduces sheet size information as an intermediary element to mediate between the document size sensors and the copying operation. When the detected document size does not match any predefined document size, the system uses the sheet size information to determine the reading reference position and reading length, thereby resolving the measurement precision issue for special document sizes while maintaining automation.
2Device complexity
If document size sensors identify only representative document sizes, then device complexity is reduced, but adaptability deteriorates for special document sizes
Solution Approach 1:
The patent makes the sheet size information serve multiple functions: it is used both for determining the output sheet size and as a fallback for determining the reading reference position and reading length when document size detection fails. This multi-functionality allows the system to support special document sizes without adding complex sensor configurations.
Data Source
AI summary
An image processing apparatus which reads an image of a document and prints the read image on a sheet includes a detecting unit, an obtaining unit, and a controller. The detecting unit detects a size of the document. The obtaining unit obtains a size of the sheet. The controller performs control such that, in a case where the size of the sheet obtained by the obtaining unit is not a predetermined size, an image in a reading region based on the size of the document detected by the detecting unit is read, and in a case where the size of the sheet obtained by the obtaining unit is the predetermined size, an image in a reading region based on the size of the sheet is read.