Virtual Camera Path Generation for Dynamic Camerawork Sharing
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Solution Overview
Problem
Existing methods fail to effectively share the motion of a virtual camera that changes with time, such as panning, tilting, zooming, or bullet time motion, making it difficult for users to share and replay camerawork with temporal operations like stopping or reversing the image.
Innovation Solution
An information-processing apparatus generates and provides camera path information that represents changes in the position and posture of a virtual viewpoint over time, allowing for the sharing and replaying of complex camerawork without sharing the entire virtual viewpoint image.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the entire virtual viewpoint image is shared to enable sharing of camera motion, then the completeness of shared information is improved, but the data communication volume increases significantly
Solution Approach 1:
The patent extracts only the essential camera path information (position, posture, and timing data) from the complete virtual viewpoint image sequence. Instead of sharing the entire image data, the system extracts and transmits only the metadata describing camera motion, significantly reducing data volume while preserving the ability to reproduce the desired camera perspective through rendering.
Solution Approach 2:
The patent segments the camera motion into discrete path points and parameters rather than sharing continuous image streams. The camera path is represented as a series of keyframes with associated metadata, allowing selective transmission of only the necessary motion information while the actual image rendering is performed locally or on demand.
2Quantity of substance
If camera path information is extracted and shared instead of the entire image, then data communication volume is reduced, but the complexity of reproducing the complete camerawork increases
Solution Approach 1:
The patent introduces a camera path information representation as an intermediary between the original virtual viewpoint images and the reproduction system. This intermediary layer (containing position, posture, and timing data) serves as a bridge that enables reconstruction of camera motion without requiring transmission of the actual image data, simplifying the reproduction process while reducing data requirements.
Solution Approach 2:
The patent transforms the representation from pixel-based image data to parameter-based camera path data. By changing the fundamental parameters from image content to camera motion parameters (position coordinates, orientation angles, timing information), the system achieves compact representation that is easier to transmit and reproduce while maintaining the essential camerawork characteristics.
3Adaptability or versatility
If user interaction is required to specify camera position and posture, then the flexibility of customization is improved, but the ease of operation deteriorates
Solution Approach 1:
The patent implements self-service functionality where the system automatically generates and shares camera path information without requiring manual user input for each camera parameter. The system captures the camera motion characteristics during recording and automatically creates shareable path data, eliminating the need for users to manually specify camera position and posture while maintaining full customization flexibility.
Data Source
AI summary
An information-processing apparatus generates camera path information that represents changes with time in the position and posture of a virtual viewpoint and provides another apparatus with the generated camera path information.