Thumbnail Generation for Document Page Deletion
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Solution Overview
Problem
Conventional image processing apparatuses with thumbnail display functions face issues such as prolonged wait times for thumbnail generation and generation of outdated thumbnail images due to dynamic document changes like page deletion or merging, leading to user confusion.
Innovation Solution
The apparatus generates thumbnail images asynchronously and associates them with documents, updating the thumbnail image when the top page is deleted or documents are merged, and manages thumbnail images to prevent unnecessary generation and deletion, ensuring accurate representation of document content.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If thumbnail images are generated synchronously with document operations, then thumbnail accuracy is maintained, but user wait time increases
Solution Approach 1:
The system generates thumbnail images in advance when documents are stored or updated, so that thumbnails are ready before users need to view them. This preliminary generation eliminates wait time during thumbnail display while maintaining accuracy through subsequent updates when documents change.
Solution Approach 2:
The system implements a feedback mechanism that detects when documents are modified (pages deleted, merged, or moved) and automatically triggers thumbnail regeneration. This ensures thumbnail accuracy is maintained without requiring synchronous generation during every user interaction.
2Reliability
If thumbnail images are generated for every document operation, then thumbnail accuracy is maintained, but processing overhead increases
Solution Approach 1:
The system dynamically adjusts thumbnail generation based on the type of document operation. Thumbnails are regenerated only when operations affect the top page (page deletion, merging, or moving), while operations on other pages reuse existing thumbnails. This dynamic approach maintains accuracy where needed while avoiding unnecessary processing.
Solution Approach 2:
The system applies different thumbnail generation strategies based on the specific operation type and affected document sections. Only the necessary thumbnails are regenerated locally when specific conditions are met, rather than regenerating all thumbnails globally, thus maintaining accuracy efficiently.
3Ease of operation
If thumbnail images are stored for each document, then thumbnail display is enabled, but storage space is consumed
Solution Approach 1:
The system merges thumbnail resources by allowing multiple documents to share the same thumbnail image when they have identical top pages. This reduces redundant storage while maintaining the ability to display thumbnails for all documents, thus optimizing storage space utilization.
4Reliability
If thumbnail images are updated frequently, then thumbnail accuracy is maintained, but system resource usage increases
Solution Approach 1:
The system dynamically determines when thumbnail updates are necessary based on the type of document operation. Updates occur only when operations affect the top page, and the system uses efficient image processing techniques to minimize resource consumption during updates, balancing accuracy with resource usage.
Data Source
AI summary
An image processing apparatus includes a memory, and a processor in communication with the memory, the processor configured to control a storage unit configured to associate and store a document and a thumbnail image of a top page of the document, a deletion unit configured to delete a page designated from among pages of the document stored in the storage unit, and a generation unit configured to, in a case where a page to be deleted by the deletion unit is a top page of the document, generate a thumbnail image based on the top page of the document after deletion.