AR Marker Tracking Stability via Distributed Spatial Positioning
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Solution Overview
Problem
Existing augmented reality systems face challenges in maintaining stable tracking and display of virtual content due to limitations in the visual range of cameras, leading to frequent loss of marker recognition and tracking.
Innovation Solution
A method and terminal device that capture images of multiple markers arranged at various positions, allowing for the acquisition of spatial position relations between markers, enabling accurate determination and display of virtual objects even when not all markers are within the camera's visual range, and updating data bindings with markers to change displayed virtual content.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a single marker is used for AR tracking, then the system is simple to operate, but the tracking stability deteriorates due to limited camera visual range
Solution Approach 1:
The patent divides the tracking system into multiple independent markers distributed across different spatial locations. Instead of relying on a single marker that must remain within camera view, the system segments the tracking function across multiple markers, allowing the camera to track at least one marker even when others are outside the visual range. This segmentation maintains tracking stability while preserving operational simplicity.
2Area of stationary object
If multiple markers are arranged at various positions, then the tracking range is extended, but the device complexity increases
Solution Approach 1:
The patent implements a universal marker recognition system that can handle multiple markers with identical or similar visual characteristics. The terminal device's image processing capability is designed to recognize any of the plurality of markers regardless of their spatial position, making the system multi-functional in terms of marker detection. This universality extends the effective tracking area without proportionally increasing system complexity.
3Device complexity
If the camera visual range is limited, then the device structure is simple, but the marker recognition reliability deteriorates
Solution Approach 1:
The patent transitions from a single-point tracking approach to a multi-dimensional marker distribution system. By arranging markers across multiple spatial dimensions and locations, the system ensures that at least one marker remains within the camera's limited visual range during user movement. This dimensional expansion of marker placement compensates for the camera's restricted field of view without requiring complex camera systems.
Data Source
AI summary
A method of generating a virtual object includes: capturing an image containing a target marker, wherein the target marker is at least one marker of a plurality of markers, and is within a visual range of the terminal device, and the plurality of markers are arranged at various positions dispersively; acquiring a target spatial position of the target marker relative to the terminal device, based on the image; reading a first spatial position relation between each of the plurality of markers, storing the same in the terminal device, and acquiring a second spatial position relation of a virtual object relative to the plurality of markers; determining a display position of the virtual object, based on the first spatial position relation, the second spatial position relation, and the target spatial position; and generating the virtual object based on the display position.