AR Eyewear Ego-Motion Alignment Without Shared Markers
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Solution Overview
Problem
Existing augmented reality technologies require significant computational resources and memory to align multiple eyewear devices using common image content, such as markers, which is inefficient and burdensome.
Innovation Solution
Eyewear devices use six degrees of freedom (6DOF) tracker trajectories for ego motion alignment, allowing them to track each other or an object like a user's face, enabling collaborative AR without relying on common scene alignment, and utilize inertial measurement units to reduce computational burden.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If common image content (markers) is used to align multiple eyewear devices, then alignment accuracy is improved, but computational resources and memory requirements increase significantly
Solution Approach 1:
The patent extracts and removes the requirement for common image content (markers) from the alignment process. Instead of using markers as an intermediary for alignment, the system directly uses 6DOF tracker trajectories from each device's own sensors (IMU, camera) to achieve ego-motion alignment, eliminating the computational burden of marker detection, recognition, and alignment while maintaining alignment accuracy
Solution Approach 2:
Each eyewear device performs alignment independently using its own 6DOF tracker data from onboard sensors (inertial measurement unit, camera). The devices self-align through ego-motion tracking without requiring external markers or complex inter-device communication for alignment, reducing computational resources and memory requirements while achieving accurate collaborative AR
2Adaptability or versatility
If multiple eyewear devices are aligned using common scene content, then collaborative AR functionality is enabled, but device complexity and computational burden increase
Solution Approach 1:
The alignment system is segmented into independent 6DOF trackers for each device, with each tracker processing its own sensor data (IMU, camera) locally. This segmentation allows each device to independently compute its own trajectory without requiring complex centralized processing or inter-device coordination for alignment, simplifying the overall system while enabling collaborative AR
Solution Approach 2:
The 6DOF tracker serves multiple functions: it provides both the device's own pose estimation for AR rendering and the trajectory data needed for alignment with other devices. This multi-functionality eliminates the need for separate alignment systems, reducing device complexity while maintaining collaborative AR functionality
Data Source
AI summary
Eyewear providing an interactive augmented reality experience between two eyewear devices by using alignment between respective 6DOF trajectories, also referred to herein as ego motion alignment. An eyewear device of user A and an eyewear device of user B track the eyewear device of the other user, or an object of the other user, such as on the user's face, to provide the collaborative AR experience. This enables sharing common three-dimensional content between multiple eyewear users without using or aligning the eyewear devices to common image content such as a marker, which is a more lightweight solution with reduced computational burden on a processor. An inertial measurement unit may also be used to align the eyewear devices.