Image Reading Device Blank-Paper Detection for Mixed Original Sizes
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing image reading devices face challenges in accurately setting the blank-paper detection area, particularly when processing mixed bundles of regular and irregular-sized originals, leading to erroneous blank-paper detection and increased user complexity.
Innovation Solution
An image reading device equipped with a tray, conveyance path, image reading sensor, and control unit that determines the original size and controls the output of image data based on whether the original is regular or irregular, thereby avoiding the use of blank-paper detection results for irregular-sized originals to prevent erroneous determinations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the blank-paper detection area is set outside the original, then the detection area is larger and more comprehensive, but garbage adhered outside the original may be detected as printing information causing erroneous detection
Solution Approach 1:
The patent applies local quality by setting different detection strategies for different areas. For regular-sized originals, the blank-paper detection area is set to the entire reading area. For irregular-sized originals, the detection area is restricted to within the original boundaries. This localized adjustment of detection scope based on original size classification resolves the contradiction between comprehensive detection and accurate detection.
2Measurement precision
If the blank-paper detection area is set inside the original, then erroneous detection of external garbage is avoided, but printing information in the peripheral area may be overlooked causing erroneous detection
Solution Approach 1:
The patent implements dynamic adjustment of the blank-paper detection area based on the detected original size. The control unit dynamically changes the detection area boundaries: for regular-sized originals, the detection area extends to the entire reading area to capture peripheral printing information; for irregular-sized originals, the detection area is dynamically reduced to within the original boundaries to avoid missing printing information while preventing external garbage detection.
3Adaptability or versatility
If the image reading device processes mixed bundles of regular and irregular-sized originals, then versatility is improved, but the blank-paper detection area setting becomes complex and erroneous detection increases
Solution Approach 1:
The patent applies segmentation by dividing the processing of originals into two distinct categories: regular-sized originals and irregular-sized originals. The determination unit segments originals based on size classification, and the control unit applies different detection area settings for each segment. This segmentation strategy enables the device to handle mixed bundles of various sizes while maintaining simple and appropriate detection area settings for each category, thereby resolving the contradiction between versatility and complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach effectively avoids erroneous blank-paper detection for irregular-sized originals, ensuring that non-blank originals are not incorrectly identified as blank, thus preventing unnecessary resource consumption and data storage issues.
Implementation Method 1
an original is irradiated with a light from a light source and a reflected light from the original is reflected by mirrors so that the light enters an image pickup device
Data Source
AI summary
An image reading device capable of avoiding erroneous determination in blank-paper detection of an original of an irregular size even when different width originals mixed and loaded are processed at a time. An original placed on a tray is conveyed through a conveyance path. An image reading sensor reads an image of the original. A blank-paper detection unit determines whether the original is blank paper. A determination unit determines whether the original is a regular size or an irregular size. A control unit controls not to output image data of the original when the determination unit determines that the original is a regular size and the blank-paper detection unit determines that the original is blank paper, and controls to output image data of the original when the determination unit determines that the original is an irregular size and the blank-paper detection unit determines that the original is blank paper.