Point-of-Regard Control for Image Enlargement Visibility
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Solution Overview
Problem
Existing user interface technologies for scrolling and enlarging images in virtual spaces often result in desired objects being moved outside the visible area after enlargement, requiring users to search and reposition the image region, reducing the likelihood of the object remaining on the screen post-enlargement.
Innovation Solution
An information-processing device with a point-of-regard control unit that computes and adjusts the position of the point of regard within the virtual space based on the relationship between the initial and final positions and a reference point, ensuring the object remains visible after enlargement by shifting the reference point in the same orientation as the vector from the reference point to the initial point of regard.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the display region is enlarged using conventional enlargement methods, then the display magnification is improved, but the desired object may move outside the visible area
Solution Approach 1:
The system performs preliminary computation of the point of regard position before enlargement occurs. By calculating where the point of regard should be positioned after enlargement based on the relationship between the current point of regard position and reference point, the system ensures the desired object remains visible, preventing the need for subsequent search operations.
Solution Approach 2:
The system uses feedback by continuously tracking the point of regard position and adjusting the reference point position accordingly. The second control unit adjusts the reference point based on the computed point of regard position, creating a feedback loop that maintains object visibility during enlargement operations.
2Reliability
If the point of regard position is adjusted based on reference point relationship, then the object remains visible after enlargement, but the system complexity increases
Solution Approach 1:
The system introduces a reference point as an intermediary element between the display region and the predetermined region. This reference point serves as a mediator that simplifies the computation of point of regard position, making the overall system more manageable despite the added computational steps.
3Ease of manufacture
If conventional enlargement is used, then the implementation is simple, but users must search and reposition the image region after enlargement
Solution Approach 1:
The system performs the action of positioning the point of regard before the enlargement operation completes. By pre-computing the appropriate point of regard position based on the reference point relationship, the system eliminates the need for post-enlargement search and repositioning operations, saving user time.
Data Source
AI summary
An information-processing device includes: an enlargement/reduction instruction receiving unit configured to receive an enlargement/reduction instruction to enlarge or reduce a display region that is at least a portion of a predetermined region; a first control unit configured to, when enlarging or reducing the display region in accordance with the enlargement/reduction instruction, compute, based on a relationship between a position of a point of regard of the display region within the predetermined region and a position of a reference point of the predetermined region, a position where the point of regard is to be located within the predetermined region after the enlargement or reduction; and a second control unit configured to enlarge or reduce the display region, based on the enlargement/reduction instruction.