Adaptive Virtual Content Blurring for Reduced Eye Strain
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Solution Overview
Problem
In mixed reality (MR) devices, virtual content is often rendered in focus, even when it is not the primary focus of the user, leading to potential eye strain and distraction.
Innovation Solution
The implementation of an adaptive blurring mechanism that selectively applies a blur operation to virtual content based on threshold criteria, such as user focus and pixel density, using a heuristic approach to sample pixels and determine the necessity of blurring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If all virtual objects are rendered in focus, then the visual quality and detail of virtual content is improved, but the user experiences eye strain and distraction from non-focused objects
Solution Approach 1:
The patent applies different rendering qualities to different regions of the display based on user focus. Objects within the foveal region (center of gaze) are rendered in high detail and focus, while objects in peripheral regions are rendered with reduced detail and blur. This local differentiation resolves the contradiction by providing high visual quality only where needed (reducing computational load and eye strain) while maintaining detail where the user is actually looking.
Solution Approach 2:
The rendering system dynamically adjusts the focus and detail level of virtual objects based on real-time gaze tracking data. As the user's gaze moves across the display, the system continuously updates which objects are in focus and which are blurred. This dynamic adaptation allows the system to optimize visual quality and reduce eye strain based on the user's current attention state rather than using a static approach.
2Object-affected harmful factors
If blur operation is applied to all virtual content, then eye strain is reduced, but computing resources are wasted on blurring content that is already in focus
Solution Approach 1:
The system applies blur operations selectively only to virtual objects that are outside the user's foveal gaze region, while leaving objects in the center of gaze unblurred and in full detail. This localized application of blurring reduces eye strain for peripheral objects without wasting computational resources on already-focused objects, directly resolving the contradiction between reducing eye strain and conserving computing resources.
Solution Approach 2:
Instead of applying blur uniformly to all virtual content (excessive action), the system applies blur only to the extent necessary for objects outside the foveal region (partial action). This selective approach ensures that computing resources are conserved by avoiding unnecessary blurring operations on focused objects while still achieving the goal of reducing eye strain through selective blurring of peripheral content.
3Loss of information
If high detail is maintained for all virtual objects, then visual information is preserved, but user attention is drawn to non-focused objects causing distraction
Solution Approach 1:
The patent preserves high visual information content only for objects within the user's foveal gaze region, while applying reduced detail and blur to objects in peripheral regions. This local differentiation maintains visual information where the user is actually looking (preserving relevant information) while reducing detail for peripheral objects (minimizing distraction), thus resolving the contradiction between information preservation and ease of operation.
Solution Approach 2:
The system dynamically adjusts the level of visual detail for each virtual object based on real-time gaze tracking. Objects that enter or exit the foveal region have their rendering quality adjusted accordingly, ensuring that visual information is preserved for attended objects while reducing detail for unattended objects. This dynamic approach maintains ease of operation by keeping the user's attention on relevant content without losing necessary visual information.
Data Source
AI summary
An MR device may determine whether to perform an operation to blur on the virtual content. A pixel may be sampled, as well several pixels with a vicinity, or predetermined distance, from the sampled pixel. When a threshold number of pixels is used to present the virtual content, a blur operation is performed on the pixels, thus blurring the virtual content, which may cause the virtual content to be at least partially presented as a low-resolution image. Alternatively, when the threshold number of pixels is not used to present the virtual content, the blur operation is not performed, thus minimizing computational processes associated with presenting the virtual content.