Virtual Camera Positioning for Complete XR Object Cover Images
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Solution Overview
Problem
Existing solutions for generating cover images of user-defined virtual objects in XR environments fail to meet the personalized needs of users, resulting in images that are incomplete or aesthetically unpleasing.
Innovation Solution
A method and apparatus for determining the position of a virtual camera based on the size of the virtual object, adjusting the camera's distance and orientation, and rendering the object to generate a complete and aesthetically pleasing cover image, which includes configuring the virtual camera in a predetermined direction or perpendicular to the object's bounding box, and adjusting the field of view and clipping plane accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If existing solutions are used to generate cover images of virtual objects, then the generation process is simple, but the resulting images are incomplete and aesthetically unpleasing
Solution Approach 1:
The patent calculates and determines the optimal virtual camera position in advance based on the virtual object's bounding box dimensions before rendering. By pre-computing the camera position using the formula D = k * max(L, W, H), the system ensures the camera is positioned at the correct distance to capture the complete virtual object, eliminating the incompleteness issue while maintaining automated operation.
Solution Approach 2:
The patent dynamically adjusts the virtual camera's position parameters based on the virtual object's size parameters. By changing the camera distance parameter D according to the object's bounding box dimensions (L, W, H), the system adapts the camera positioning to each specific object, ensuring complete and aesthetically pleasing cover images for objects of varying sizes.
2Manufacturing precision
If the virtual camera is positioned closer to capture more details, then image completeness improves, but the field of view becomes too narrow and may cut off parts of the object
Solution Approach 1:
The patent establishes a mathematical relationship between camera distance D and object dimensions (L, W, H) using the formula D = k * max(L, W, H). This parameter adjustment ensures the camera is positioned at an optimal distance that balances detail capture with complete object visibility, preventing both cutoff issues and excessive distance that would reduce detail quality.
Solution Approach 2:
The system dynamically adjusts the camera position based on the specific dimensions of each virtual object. Rather than using a fixed camera position, the camera distance is dynamically calculated to adapt to objects of different sizes, ensuring that each object is captured at the optimal distance for both completeness and detail quality.
3Ease of operation
If a fixed camera position is used for all objects, then the system is simple to operate, but it cannot adapt to objects of different sizes and produces inconsistent image quality
Solution Approach 1:
The patent implements automatic adaptation to objects of different sizes by calculating the camera position parameter D based on each object's bounding box dimensions. The formula D = k * max(L, W, H) automatically adjusts the camera distance according to the largest dimension of the object, enabling the system to handle objects of varying sizes without manual intervention while maintaining consistent image quality.
Solution Approach 2:
The system performs self-adjustment by automatically calculating the optimal camera position based on the virtual object's own dimensional parameters. The camera positioning system serves itself by using the object's bounding box information to determine the appropriate capture distance, eliminating the need for manual configuration while adapting to each object's specific characteristics.
Data Source
AI summary
Embodiments of the present application provide a method, an apparatus, a device, a medium, and a program for generating a cover image of a virtual object. The method includes receiving a generation instruction of a cover image of a virtual object; determining a position of a virtual camera for shooting the virtual object; shooting the virtual object according to the position of the virtual camera; and generating, according to an image of the virtual object shot by the virtual camera, a cover image corresponding to the virtual object. The cover image of the virtual object shot by this method is more complete and aesthetically pleasing.