Head-Mounted Display Pose Alignment Using External Markers
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Solution Overview
Problem
Existing head-mounted displays lack the capability to accurately embed a field of view in a virtual space, particularly for complex installations, requiring costly and time-consuming physical models for function testing.
Innovation Solution
A head-mounted display system that combines intrinsic and extrinsic capture pose determination using markers and 3D measuring devices to accurately embed a field of view in a virtual space, allowing for precise alignment and synchronization of virtual and physical realities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If physical models (cardboard/wood) are used for function testing, then measurement precision and reliability are improved, but loss of time and loss of substance increase significantly
Solution Approach 1:
The patent creates virtual copies (3D digital models) of physical installations that can be tested repeatedly without material consumption. These virtual models replicate the geometric and functional properties of physical models, enabling function testing in virtual reality while eliminating the need for repeated physical model construction and destruction.
Solution Approach 2:
The patent replaces physical mechanical models with virtual 3D models displayed through head-mounted displays. The virtual models are manipulated and tested using digital interfaces and haptic feedback devices, substituting physical material handling with computational processing and virtual interaction.
2Measurement precision
If physical models are used for function testing, then measurement precision is improved, but loss of substance and manufacturing cost increase
Solution Approach 1:
The patent creates virtual copies (3D digital models) of physical installations that can be tested repeatedly without material consumption. These virtual models replicate the geometric and functional properties of physical models, enabling function testing in virtual reality while eliminating the need for repeated physical model construction and destruction.
Solution Approach 2:
The patent enables recovery and reuse of installation models in digital form. Virtual models can be stored, modified, and reused for multiple testing scenarios without material waste, allowing iterative design improvements and multiple function tests using the same digital asset.
3Device complexity
If only intrinsic capture pose determination is used, then device complexity is reduced, but measurement precision and alignment accuracy deteriorate
Solution Approach 1:
The patent merges intrinsic capture pose determination (from head-mounted display sensors) with extrinsic capture pose determination (from external 3D measuring devices). This combination integrates data from multiple sources to achieve higher alignment accuracy between virtual and physical realities while maintaining manageable system complexity through coordinated processing.
Solution Approach 2:
The patent introduces markers as intermediary objects that facilitate precise alignment between virtual and physical spaces. These markers serve as reference points that both the head-mounted display and external 3D measuring devices can detect, enabling accurate spatial correspondence without requiring direct complex interactions between the systems.
4Measurement precision
If markers are added for extrinsic capture pose determination, then alignment accuracy is improved, but device complexity increases
Solution Approach 1:
The patent uses visually distinct markers that can be detected by both intrinsic and extrinsic sensing systems. These markers serve as standardized reference elements that simplify the alignment process between virtual and physical spaces, providing clear detection targets without requiring complex sensor configurations.
Data Source
AI summary
A method is provided in which at least one marker (10, 17) is configured or added on the outside in order to permit capture of a pose of a head-mounted device (16).