XR Controller Marker Layout for Accurate Position and Posture Tracking
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Solution Overview
Problem
Existing XR controllers face challenges in accurately detecting position and posture due to the need for at least three markers that are sufficiently separate and distinct from one another, which is difficult to achieve with traditional marker arrangements.
Innovation Solution
The XR controller employs a phyllotaxis arrangement of markers on its surface, specifically using a spiral disposition pattern to ensure markers are sufficiently separated and distinct, allowing for accurate detection by cameras.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional marker arrangements are used on XR controller surfaces, then the controller structure is simple, but the detection accuracy of position and posture is insufficient
Solution Approach 1:
The patent applies asymmetric marker arrangement patterns (such as triangular, square, or pentagonal configurations) on the XR controller surface. These asymmetric patterns ensure that markers are sufficiently separated and distinct from one another, enabling accurate detection of position and posture by cameras while avoiding the symmetry issues that lead to detection ambiguities.
Solution Approach 2:
The patent transitions from simple planar marker arrangements to three-dimensional spatial distribution of markers on the controller surface. By arranging markers in multiple dimensions (different heights, angles, and positions on the controller body), the system achieves better separation and distinctness of markers, improving detection accuracy without significantly increasing overall complexity.
2Measurement precision
If at least three markers are disposed sufficiently separate from one another with different disposition patterns, then position and posture detection accuracy is improved, but the difficulty of achieving such arrangement increases
Solution Approach 1:
The patent divides the controller surface into multiple regions and places markers in specific segmented areas (such as corners, edges, or face centers of the controller body). This segmentation approach ensures that markers are sufficiently separate and have different disposition patterns while simplifying the manufacturing process through standardized placement guidelines.
Solution Approach 2:
The patent applies different marker arrangement patterns to different local areas of the controller surface. Each region has optimized marker disposition tailored to its specific location and viewing angle requirements, ensuring sufficient separation and distinctness while making the overall manufacturing process more straightforward through localized optimization.
Data Source
AI summary
Disclosed herein is an XR controller including a casing and first markers arranged in a phyllotaxis arrangement on a surface of the casing.