Optical Tracker Positioning via LED Group Reprojection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing methods for positioning optical trackers in virtual reality (VR) scenes are complex and inefficient, requiring at least three pairs of three-dimensional to two-dimensional point pairs, which complicates the optimization process and reduces positioning efficiency.
Innovation Solution
A method and apparatus for an optical tracker that includes N LED lights, where an infrared image is obtained and reprojection coordinates are calculated for each group of LED lights, allowing for the determination of the positioning distance between the optical tracker and a camera, thereby simplifying the positioning process and improving efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the perspective N-point algorithm is used for positioning the optical tracker, then the positioning accuracy can be optimized, but the optimization process becomes complex and positioning efficiency decreases
Solution Approach 1:
The patent segments the positioning problem by dividing N LED lights into multiple groups of M LED lights. Each group is reprojected separately onto the infrared image to obtain reprojection coordinates. This segmentation reduces the computational complexity of the optimization process while maintaining positioning accuracy through multi-group coordinate calculation and comparison.
2Measurement precision
If the perspective N-point algorithm is used for positioning the optical tracker, then the positioning accuracy can be optimized, but the positioning efficiency becomes low
Solution Approach 1:
The patent applies preliminary action by reprojecting multiple groups of M LED lights onto the infrared image before final positioning determination. The reprojection coordinates of multiple groups are calculated in advance, and the positioning distance is determined by comparing these pre-calculated coordinates, thereby improving positioning efficiency without sacrificing accuracy.
3Reliability
If at least 3 pairs of three-dimensional to two-dimensional point pairs are required for positioning, then the positioning can be achieved, but the computational complexity increases
Solution Approach 1:
The patent changes the parameter approach by using N LED lights (where N≥M>1) organized in multiple groups instead of requiring at least 3 pairs of point coordinates. The reprojection of LED light groups and calculation of positioning distance based on reprojection coordinates simplifies the computational parameters while ensuring reliable positioning through multiple light group validations.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces computational complexity and enhances positioning efficiency by using multiple groups of LED lights to calculate the positioning distance, avoiding the need for multiple point pairs and improving the operating speed of the positioning apparatus.
Implementation Method 1
obtaining an infrared image of the optical tracker, where the infrared image includes respective light spots generated by M LED lights
Data Source
AI summary
Embodiments of the present disclosure provides a positioning method, apparatus, and system of an optical tracker, which can be applied to a VR scene, where the VR scene includes an optical tracker and a headset device, the headset device includes a camera, and the optical tracker includes N LED lights, and the method includes: obtaining an infrared image of the optical tracker, where the infrared image includes respective light spots generated by M LED lights, with N≥M>1, reprojecting, for each group of LED lights in multiple groups of LED lights, a group of LED lights onto the infrared image to obtain corresponding reprojection coordinates of the group of LED lights, where each group of LED lights includes M LED lights, and determining a positioning distance between the optical tracker and the camera according to respective corresponding reprojection coordinates of each group of LED lights and the infrared images.