AR Calibration Apparatus for Virtual-Physical Alignment
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Solution Overview
Problem
Current augmented reality (AR) and mixed reality (MR) systems require a lengthy and skill-intensive calibration process to accurately superimpose virtual objects onto physical objects, impacting user immersion and efficiency.
Innovation Solution
A calibration method and apparatus that measure the position and orientation of physical and virtual objects, generate a composite image, detect user instructions, and acquire correction values through parallel movement and rotation, facilitating the alignment of virtual objects with physical objects on a predetermined plane.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional calibration methods are used to achieve precise superimposition of virtual objects on physical objects, then registration accuracy is improved, but calibration time and operational complexity increase significantly
Solution Approach 1:
The system pre-generates multiple candidate correction values based on possible positional deviations before actual calibration is needed. When calibration is required, the system only needs to select from these pre-computed candidates rather than performing full calibration calculations, significantly reducing calibration time while maintaining accuracy
Solution Approach 2:
Instead of performing complete and complex calibration procedures, the system uses simplified calibration steps that achieve sufficient accuracy for practical purposes. The calibration process is made easier to perform while obtaining correction values that are accurate enough for most application scenarios
2Measurement precision
If traditional calibration methods are used to achieve precise superimposition of virtual objects on physical objects, then registration accuracy is improved, but operational ease deteriorates due to skill requirements
Solution Approach 1:
The system automatically performs calibration operations without requiring user expertise. The calibration apparatus autonomously captures images, calculates positional deviations, determines correction values, and applies corrections, making the process accessible to users without specialized calibration skills while maintaining high accuracy
Solution Approach 2:
The manual calibration process is replaced with an automated image processing and calculation system. Instead of requiring operators to manually adjust and align objects, the system uses computer vision and algorithmic calculations to automatically determine and apply correction values, eliminating the need for operator skill
Data Source
AI summary
A calibration method and apparatus acquires a correction value to correct position and orientation measured by using a position and orientation sensor provided on a physical object by measuring position and orientation of the physical object when a calibration is started, generating an image of the virtual object existing on a plane on which the physical object can be moved, and displaying a composite image formed by superimposing the image of the virtual object on the captured image of the physical object. Additional features include detecting an instruction indicating that a predetermined positional relationship between the physical object and the virtual object is satisfied, providing a second measuring position and orientation of the physical object when the instruction is detected, and acquiring the correction value expressed by parallel movement of the physical object on the plane and rotation of the physical object about an axis set in the direction perpendicular to the plane on the basis of the first position and orientation measured and the second position and orientation measured.