Virtual Camera Camerawork Generation for Free-Viewpoint Video
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Solution Overview
Problem
Generating free-viewpoint videos requires determining a camerawork that represents the temporal path of a viewpoint, which is challenging due to the high flexibility of setting camerawork, making it difficult to set appropriately.
Innovation Solution
A method and device for generating camerawork that automatically determines a three-dimensional model from multi-view videos, identifies the target scene, and generates camerawork representing the temporal changes in position and orientation of a virtual camera, allowing for automatic determination and saving time and effort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If camerawork is manually determined for free-viewpoint video generation, then the quality and appropriateness of camerawork can be ensured, but the time and effort required increase significantly
Solution Approach 1:
The system enables automatic camerawork determination by having the video processing device autonomously analyze multi-view video data, identify target scenes, and generate appropriate camerawork without requiring manual operator intervention. This self-service approach resolves the contradiction by eliminating the time-consuming manual process while maintaining quality through automated analysis algorithms.
Solution Approach 2:
The invention transforms the camerawork determination process from a manual parameter-setting task to an automated parameter-generation process. By changing the operational mode from human-operated to system-autonomous, the patent achieves both time efficiency and quality maintenance through automated scene analysis and camerawork synthesis.
2Adaptability or versatility
If high flexibility is provided in camerawork setting, then adaptability to different scenes is improved, but the difficulty of determining appropriate camerawork increases
Solution Approach 1:
The system incorporates feedback mechanisms where the video processing device analyzes the results of automatic camerawork determination and uses this information to refine future determinations. This feedback loop enables the system to handle diverse scenes effectively while managing the complexity of automatic determination through iterative improvement.
Solution Approach 2:
The patent performs preliminary analysis of multi-view video data to identify target scenes and characteristics before generating camerawork. This preliminary action simplifies the subsequent camerawork determination process by pre-processing the data and establishing a foundation for automated decision-making, thereby reducing overall complexity.
3Productivity
If automatic camerawork determination is implemented, then productivity is improved, but the precision of camerawork may be compromised
Solution Approach 1:
The patent replaces the mechanical system of manual camerawork setting with an automated computational system. This substitution maintains precision by using algorithmic analysis of multi-view video data rather than human judgment, while simultaneously improving productivity through automated processing. The computational approach ensures consistent and accurate camerawork determination at high speed.
Solution Approach 2:
The system creates accurate representations (copies) of the target scene by analyzing multi-view video data and generating three-dimensional models. These copied representations serve as the basis for automatic camerawork determination, ensuring that the generated camerawork accurately reflects the actual scene characteristics while enabling rapid processing.
Data Source
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AI summary
A camerawork generating method includes: generating (S112), from a multi-view video (151) of a same scene captured from different viewpoints, a three-dimensional model (152) for the scene; determining (S113) a target scene (153) which is included in the scene and is a target for which a free-viewpoint video (156) of the three-dimensional model (152) as viewed from a virtual camera is to be generated; and generating (S114) a camerawork (154) representing a temporal change in a position and an orientation of the virtual camera in the free-viewpoint video (156).