AR Display Control Maintaining Spatial Position Stability

The patent transitions from 2D screen coordinates to 3D spatial coordinates by introducing depth information and world coordinate systems. This allows annotations to be positioned in three-dimensional space rather than being constrained to the two-dimensional display plane, enabling stable spatial positioning even when the viewpoint changes. The conversion between screen coordinates and world coordinates maintains annotation positions across different viewing angles and distances.

The system continuously tracks the camera's viewpoint changes and adjusts annotation positions in real-time to maintain their spatial relationships. By monitoring changes in the viewing angle, distance, and orientation, the system dynamically recalculates and repositions annotations to ensure they remain stable and correctly aligned with their target objects in the real world.

The system performs preliminary calculations to establish the relationship between screen coordinates and world coordinates before annotations are displayed. By pre-computing transformation matrices and spatial mappings based on the initial viewpoint, the system creates a reference framework that enables accurate annotation placement even as the viewpoint subsequently changes, maintaining precision without restricting flexibility.

The patent implements a dynamic annotation system that automatically adjusts annotation positions and orientations in response to viewpoint changes. Rather than using static positioning, the system continuously updates annotation parameters based on real-time camera data, allowing annotations to adapt their spatial coordinates, rotation angles, and scale factors to maintain accuracy across different viewing conditions.