Visual Field Tracking via Virtual Camera Axis Movement
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Solution Overview
Problem
Current methods for collecting visual-field information in virtual reality environments using head-mounted displays impose a large calculation load on processors, leading to unchanging visual-field images and potential VR sickness due to the inability to adapt to user movements.
Innovation Solution
A visual-field information collection method that uses a virtual camera to define the user's visual axis, determining its movement based on head-mounted display movements and line-of-sight direction, and generating movement information only when the axis changes between predetermined regions, thereby reducing processor load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If visual-field information collection is performed continuously to track user movements in VR, then the accuracy of visual field tracking is improved, but the calculation load on the processor increases excessively
Solution Approach 1:
The patent applies partial action by collecting visual field information only when necessary - specifically when the user's line of sight moves to a different region of interest. Instead of continuous tracking, the system selectively collects data at discrete moments when visual field changes are significant, thereby reducing processor load while maintaining adequate tracking accuracy for the application needs.
2Adaptability or versatility
If the visual field image is updated continuously to respond to HMD movement, then the user experience and immersion are improved, but the processor may exceed its calculation processing ability leading to unchangeable visual field images
Solution Approach 1:
The system implements periodic action by updating the visual field image at discrete intervals based on region transitions rather than continuously. When the user's line of sight moves to a new region of interest, the system triggers an update at that periodic moment, balancing responsiveness to user movement with processor capability to maintain reliable visual field image generation.
3Measurement precision
If detailed visual field information is collected for every user movement, then the precision of visual field data is improved, but the communication load and data processing requirements increase
Solution Approach 1:
The patent extracts only the essential visual field information - specifically recording which region of interest the line of sight moved to and the timing of the movement. Instead of collecting and transmitting complete detailed visual field data for every movement, the system extracts and transmits only the critical region transition information, significantly reducing data volume while preserving the precision needed for application purposes.
Data Source
AI summary
A visual-field information collection method is capable of collecting visual-field information of a user wearing a head mounted display without applying a large calculation load to a processor. The visual-field information collection method to be executed by a processor includes arranging, in a virtual space in which a user wearing an HMD is immersed, a virtual camera that defines a visual axis for specifying a visual field of the user. The method includes determining the visual axis in accordance with one of a movement of the HMD and a line-of-sight direction of the user. The method includes determining whether or not the visual axis is moved from a predetermined first position to a predetermined second position. The method includes generating movement information representing that the visual axis is moved when the visual axis is moved from the predetermined first position to the predetermined second position.