XR Content Roll Switching for Stable Viewing During Head Motion
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Solution Overview
Problem
Head-locked virtual content appears jumpy or jittery during rotational head movements due to device limitations and human visual system properties, causing discomfort in XR environments.
Innovation Solution
Implement methods and systems that adjust the presentation mode of virtual content based on detected head poses, using threshold-based criteria to transition between different presentation modes and offset values, ensuring smooth movement and alignment within the XR environment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If head-locked virtual content remains stationary within user's field of view during rotational head movements, then content stability is improved, but the content appears jumpy or jittery in relation to the environment
Solution Approach 1:
The patent applies dynamics by transitioning from a static head-locked presentation mode to a dynamic environment-locked presentation mode. The system detects head pose changes and automatically switches between presentation modes based on motion criteria, allowing the virtual content to adapt its behavior dynamically. In environment-locked mode, the content moves with the environment rather than remaining fixed to the head, reducing the jumpy appearance while maintaining stability through controlled transitions.
Solution Approach 2:
The patent changes the presentation mode parameter from head-locked to environment-locked based on detected head pose motion. By monitoring head pose changes and comparing them against motion criteria thresholds, the system adjusts the content's reference frame parameter, switching between different locking modes to optimize both stability and visual smoothness during head movements.
2Ease of operation
If virtual content moves smoothly during head movements, then comfortability is improved, but device limitations cause the content to appear jittery
Solution Approach 1:
The patent introduces an intermediary mechanism - the presentation mode switching system - that mediates between the head's rotational movements and the virtual content's position. By detecting head pose changes and using motion criteria as intermediaries, the system determines when to switch between head-locked and environment-locked modes, smoothing out the transitions and reducing jitter caused by direct head movement tracking.
3Ease of operation
If multiple presentation modes are used to reduce jitter, then content comfortability is improved, but system complexity increases
Solution Approach 1:
The patent implements dynamic mode switching between head-locked and environment-locked presentation modes based on real-time head pose detection and motion criteria evaluation. The system automatically transitions between modes without user intervention, using detected head pose changes as triggers. This dynamic approach improves comfortability by selecting the appropriate mode for each situation while keeping the complexity manageable through automated decision-making based on predefined motion thresholds.
Data Source
AI summary
In one implementation, a method for improving comfortability of virtual content during head roll motions includes: determining a scene roll origin value for an XR environment; detecting ahead pose with pose roll value; when a difference between the scene roll origin value and the pose roll value is less than a first angular threshold, presenting virtual content within the XR environment in a first presentation mode, wherein the virtual content is presented with a first content roll value in the first presentation mode based the pose roll value; and when the difference between the scene roll origin value and the pose roll value is not less than the first angular threshold, presenting the virtual content within the XR environment in a second presentation mode, wherein the virtual content is presented with a second content roll value in the second presentation mode based on the scene roll origin value.