AR Identifier Positioning for Accurate 3D Device Placement
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Solution Overview
Problem
Augmented reality (AR) technology struggles with accurate positioning of three-dimensional objects in real environments, lacking effective solutions for precise positioning of 3D images.
Innovation Solution
An AR device scans an identifier on a positioned device's surface to determine its position in a virtual coordinate system, using a trigger instruction to establish the system, and employs image feature points to calculate the device's position relative to the identifier, enabling precise 3D positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If AR technology uses traditional 2D image identification methods, then it can accurately position 2D images in the virtual coordinate system, but it fails to accurately position 3D objects in the real environment
Solution Approach 1:
The patent segments the positioning process into two distinct phases: first establishing a virtual coordinate system through 2D image identification, then transforming 3D object positions into this coordinate system through coordinate transformation calculations. This segmentation allows the system to leverage accurate 2D positioning while extending capability to 3D objects.
Solution Approach 2:
The patent introduces a virtual coordinate system as an intermediary between the real-world 3D objects and the AR display system. By establishing this intermediate coordinate framework through 2D marker recognition, the system can then map 3D object positions into this framework through mathematical transformation, enabling accurate 3D positioning indirectly through 2D methods.
2Reliability
If AR technology establishes a virtual coordinate system based on 2D image recognition, then it achieves good positioning for 2D content, but it cannot effectively position 3D objects in the actual environment
Solution Approach 1:
The patent changes the parameter representation from direct 3D spatial coordinates to 2D image plane coordinates combined with coordinate transformation matrices. By altering how positions are represented and calculated—using 2D marker positions as base parameters and applying transformation matrices—the system maintains reliable positioning while expanding to support 3D objects.
Data Source
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AI summary
A positioning method and apparatus for a device are provided. The method includes: an augmented reality device obtains a first position of an identifier in a virtual coordinate system by scanning the identifier set on a surface of a positioned device (S102); the augmented reality device obtains a second position of the identifier on the surface of the positioned device (S104); and the augmented reality device determines a position of the positioned device in the virtual coordinate system according to the first position and the second position (S106).