Preview Image Display Area Determination for Document Scanners
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Solution Overview
Problem
Current image processing devices face inefficiencies in previewing document images due to low display resolution, requiring users to print sheets for detailed checks and perform cumbersome operations to recognize page issues, leading to increased time and operational load.
Innovation Solution
An image processing device and method that includes an image reading part, preview image creation, displaying area determination, and display control to allow users to specify and display only the desired parts of the image for preview, reducing operational load and time by enabling high-resolution preview and automatic page handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the entire document image is previewed on a low-resolution display device, then the user can see the whole document, but the display resolution is insufficient for checking details
Solution Approach 1:
The patent divides the preview display into multiple resolution levels: a low-resolution overview showing the entire document and high-resolution enlarged views of specific regions. This segmentation allows users to first locate areas of interest in the overview, then examine details in enlarged portions without requiring the entire display to be high-resolution.
Solution Approach 2:
The patent adds a spatial dimension to the preview system by implementing zoomable and panable views. Users can navigate from a global view to local detailed views by enlarging specific regions, effectively adding a scale dimension that transforms the single-resolution display into a multi-scale inspection system.
2Measurement precision
If printed sheets are produced for detailed image checks, then detail checking is enabled, but time is required for producing and checking printed sheets
Solution Approach 1:
The patent creates a digital copy (enlarged preview image) of the specific region to be inspected, displaying it at high resolution on the screen. This digital copy serves as a substitute for the physical printed sheet, providing the same detail inspection capability without requiring physical printing, thus eliminating the time loss associated with printing and physical handling.
3Ease of operation
If automatic recognition of page numbers is performed for each page, then the part with page number can be enlarged automatically, but very long processing time is required
Solution Approach 1:
Instead of performing automatic page number recognition on every page, the system performs recognition only on the currently displayed or recently accessed page. This partial action approach provides automatic page handling where needed while avoiding the excessive processing time that would result from processing all pages uniformly.
4Measurement precision
If operation for enlarging image is made for each page, then detail checking is enabled, but cumbersome operations are required for users
Solution Approach 1:
The system automatically performs the enlargement operation when a user selects a region in the overview, eliminating the need for users to manually navigate through multiple pages and perform repeated enlargement operations. The system serves itself by automatically providing the enlarged view of the selected region, reducing user operational burden.
Data Source
AI summary
An image processing device includes an image reading part for reading an image of a document and generating image data, a preview image creation part for creating preview image from the image data generated by the image reading part, a display part capable of displaying at least one part of the preview image, an operation input part for receiving input in response to operation made by a user, a display area determination part for determining a part specified in response to operation made through the operation input part as a displaying area of the preview image, and a display control part for extracting an image responsive to the displaying area from the preview image and for displaying the extracted image on the display part. So, a load for user's operation for preview of an image read from a document may be reduced, and page update and others may be executed efficiently by reducing time to preview display.