Extended Reality Hologram Filtering for Vertical Angular Misalignment
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Solution Overview
Problem
Extended reality systems suffer from vertical angular image misalignment, leading to visual discomfort, strain, and reduced immersion due to the human visual system's sensitivity to vertical disparity, which conventional correction methods fail to adequately address.
Innovation Solution
A method and system that detect and correct vertical angular misalignment in stereoscopic images by identifying regions with high spatial frequency, applying a correction algorithm to reduce the spatial frequency below a threshold, using sensors like IMUs and strain gauges, and adjusting hologram display properties such as blurring or low-pass filtering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If vertical angular image misalignment is present in stereoscopic images, then the ER system can display holograms, but visual discomfort and strain occur due to the human visual system's sensitivity to vertical disparity
Solution Approach 1:
The patent changes the spatial frequency parameter of the holographic content by applying blurring or low-pass filtering to reduce high spatial frequency components. This parameter modification allows the visual system to tolerate vertical angular misalignment better, as lower spatial frequencies are less sensitive to vertical disparity, thereby reducing visual discomfort while maintaining image display
Solution Approach 2:
The patent converts the harmful effect of vertical angular misalignment into a beneficial outcome by selectively reducing spatial frequency in specific regions. The harm (misalignment causing discomfort) is transformed into a benefit (controlled spatial frequency that the visual system can fuse), allowing the system to operate with inherent misalignment without causing visual strain
2Object-affected harmful factors
If spatial frequency is reduced through blurring or low-pass filtering, then visual discomfort is reduced, but image sharpness and detail are degraded
Solution Approach 1:
The patent applies spatial frequency reduction selectively to specific regions of the stereoscopic images rather than uniformly across the entire image. By identifying regions with high spatial frequency content and applying blurring or low-pass filtering only to those regions, the system reduces visual discomfort in critical areas while preserving sharpness and detail in other areas, thus resolving the contradiction between comfort and image quality
Solution Approach 2:
The patent applies partial action by reducing spatial frequency only to the extent necessary to bring it below the threshold for visual discomfort, rather than uniformly blurring the entire image. This selective and controlled application of spatial frequency reduction maintains image sharpness where possible while achieving the goal of reducing visual strain
Data Source
AI summary
Techniques for correcting a vertical angular image misalignment in stereoscopic images generated by an extended reality (ER) system are disclosed. A hologram is identified. This hologram is displayed in a scene of the ER system. A spatial frequency of the hologram is determined. A determination is made that the spatial frequency exceeds a spatial frequency threshold. The spatial frequency of the hologram is reduced until the spatial frequency is below the spatial frequency threshold. Such an operation results in a compensation being performed for a vertical angular image misalignment that exists between the stereoscopic images.