Occluded Portion Removal in Stereoscopic Displays
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Solution Overview
Problem
Stereoscopic displays often cause visual discomfort during direct touch interactions due to conflicting depth cues when a physical object occludes 3D content, leading to issues like double vision, headache, and nausea.
Innovation Solution
A computer-implemented method that determines the occluded portion of a virtual object in a stereoscopic display system and renders only the non-occluded portions, allowing direct touch interactions without visual discomfort by modifying the 3D content to appear as if it occludes the physical object.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If stereoscopic display renders 3D content to appear in front of physical objects, then depth perception is enhanced, but visual discomfort occurs due to conflicting depth cues
Solution Approach 1:
The patent extracts and removes the occluded portion of the 3D content that would appear behind the physical object from the rendered image. By taking out this problematic portion, the conflicting depth cues are eliminated while preserving the beneficial depth perception for the remaining visible content.
Solution Approach 2:
The system preemptively identifies and removes portions of 3D content that would create depth conflicts before they can cause visual discomfort. This preliminary action prevents the harmful effect of conflicting depth cues from occurring in the first place.
2Ease of operation
If direct touch interaction is enabled with 3D content, then ease of operation improves, but visual discomfort increases due to occlusion conflicts
Solution Approach 1:
The patent extracts the occluded portion of 3D content that would conflict with the physical touch object from the rendered display. This allows direct touch interaction to proceed without the visual discomfort caused by depth cue conflicts between the virtual content and physical object.
3Loss of information
If complete 3D content is rendered, then information completeness is maintained, but visual discomfort occurs from conflicting depth cues
Solution Approach 1:
The patent selectively extracts only the occluded portion of the 3D content for removal, preserving all other information. This minimal extraction approach maintains information completeness while eliminating the specific visual discomfort caused by depth conflicts in the occluded region.
Solution Approach 2:
The patent applies different rendering quality to different regions of the 3D content. The occluded portion is removed (lower quality) while the visible portion is rendered completely (higher quality), optimizing the balance between information completeness and visual comfort.
Data Source
AI summary
A computer-implemented method for stereoscopically displaying content includes determining a first position of an object within in a region of display space proximate to a stereoscopic display device and calculating a second position of a virtual object in the region. The method further includes determining an occluded portion of the virtual object that is occluded the object when the virtual object is disposed at the second position and causing the display device to stereoscopically render for display one or more portions of the virtual object that do not include the occluded portion. One advantage of the disclosed method is that a viewer can perform direct touch operations with stereoscopically displayed (3D) content with reduced visual discomfort.