Stereoscopic Image Rendering Region Restriction for VR Sickness Reduction

The patent divides the viewing area into multiple regions (first region and second region) and applies different rendering strategies to each. In the first region, elements are rendered with stereoscopic depth and viewpoint movement is permitted to enhance story engagement. In the second region, elements are rendered without stereoscopic depth or with limited viewpoint movement to minimize viewer discomfort. This segmentation allows simultaneous achievement of engaging viewpoint changes and prevention of VR sickness by localizing the impact to specific spatial regions.

The patent applies different rendering qualities to different spatial regions. In the first region where elements are to be prominently displayed, the system renders with full stereoscopic depth and allows viewpoint movement that follows story development. In the second region, the rendering is simplified or restricted. This local differentiation enables the system to maintain naturalness in the center of view (where physical movement tracking is most effective) while allowing expressive viewpoint changes in specific story-critical areas, thereby overcoming the limitations of restricted physical movement tracking.

The patent dynamically adjusts the rendering characteristics based on the current viewing context and story requirements. The system can switch between different rendering modes (with and without stereoscopic depth, with and without viewpoint movement) in real-time. This dynamic adaptation allows the system to maintain visual continuity during transitions by gradually changing rendering parameters rather than abrupt switches, while still enabling narrative-driven viewpoint changes when needed. The dynamic nature of the rendering system allows it to balance narrative engagement with visual comfort.