Stroke Image Re-editing in Electronic Whiteboard Systems
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Solution Overview
Problem
Existing electronic information board systems cannot re-edit stroke images once they are combined with background images, limiting further processing, editing, or modification of the stroke images.
Innovation Solution
An image processing apparatus that includes a recording unit for storing user input data, a read unit for retrieving electronic documents, a display unit for showing background and stroke images, and an edit unit for editing stroke data based on user input, allowing for the re-editing of stroke images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If stroke images are combined with background images as a single image for storage, then storage efficiency is improved, but the ability to re-edit stroke images is lost
Solution Approach 1:
The patent divides the combined image into separate components: background image data and stroke image data. The stroke image data is further segmented into individual stroke elements, each with its own coordinate information and image data. This segmentation allows the system to store efficiently while maintaining the ability to selectively edit individual strokes by loading only necessary components into memory.
2Ease of operation
If all image data is loaded into memory for editing, then editing capability is improved, but memory consumption increases
Solution Approach 1:
The patent extracts only the necessary stroke data from the stored file into memory for editing, rather than loading the entire combined image. The system identifies and loads only the stroke elements that need to be modified, leaving the background image and other strokes in storage. This extraction approach enables editing capability while significantly reducing memory consumption.
3Adaptability or versatility
If stroke images are stored as separate data from background images, then re-editing capability is improved, but data structure complexity increases
Solution Approach 1:
The patent implements a nested data structure where stroke image data is contained within the overall image data structure. Each stroke element is nested with its coordinate information and image data, which are in turn nested within the file structure that also contains background image data. This nesting approach maintains re-editing capability while organizing complexity in a hierarchical, manageable manner.
Data Source
AI summary
An image processing apparatus having a display device displaying a background image and a stroke image superimposed on the background image, the stroke image reproducing a stroke which is drawn by an input operation of a user, includes a recording unit recording image data of the background image and stroke data, which are related to the stroke input by the input operation, into an electronic document; a read unit reading the electronic document; a display unit displaying the background image on the display device by using the image data of the background data, reproducing the stroke image by using the stroke data, and displaying the stroke image superimposed on the background image on the display device; and an edit unit editing the stroke data in accordance with the input operation.