Image Display Device Zoom Control via Region Recognition
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Solution Overview
Problem
Existing image display devices face a heavy processing load when calculating and displaying a rectangle based on the drag path of a user's pointer movement for zooming in, making the interface less intuitive and resource-intensive.
Innovation Solution
An image display device that acquires position information from user inputs, recognizes the enclosed region, determines a zoom-in ratio based on the image display area and selected region, and displays a zoomed-in image with its center aligned with the image display area's center, reducing processing load by only requiring position information acquisition during input processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a rectangle based on the drag path is calculated and displayed each time the pointer coordinates are moved, then the user can intuitively recognize the selected range during the drag operation, but a heavy processing load is imposed on the device
Solution Approach 1:
The patent applies preliminary action by pre-defining the rectangle display logic to only execute at specific moments (when drag operation starts and ends) rather than continuously during the entire drag process. This reduces the frequency of rectangle calculation and display operations, thereby lowering the processing load while still providing intuitive visual feedback to users at critical interaction points.
2Loss of information
If sequential heavy-load computation is performed to display the rectangle during drag operation, then the selected area can be visually indicated, but the zoom-in display process becomes resource-intensive
Solution Approach 1:
The patent implements periodic action by displaying the rectangle only at discrete moments during the drag operation (at the start and end points) rather than continuously updating it with every pointer movement. This periodic display approach maintains the visual indication function while significantly reducing the computational resources and energy required for processing.
Data Source
AI summary
An image display device includes an acquisition unit that, when an operation of enclosing an arbitrary region on a display screen is performed in response to sequential instruction inputs by a user, acquires position information indicating positions indicated by those instruction inputs, a recognition unit that specifies an enclosed region by a trajectory of the acquired position information and recognizes the enclosed region as a selected region, a determination unit that determines to zoom in an image displayed in an image display area with a zoom-in ratio determined based on the range of the selected region and the range of the image display area, and a display control unit that displays a zoomed-in transformed image with the determined zoom-in ratio in the display area with the center of the transformed image and the center of the image display area aligned.