Virtual Viewpoint Playback Speed Control for Moving Object Composition
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Solution Overview
Problem
Existing techniques face difficulties in changing a virtual viewpoint in a virtual viewpoint image with a composition desired by the operator in accordance with the movement of an object.
Innovation Solution
The system allows for the creation and reproduction of virtual viewpoint images by adjusting the playback speed of the virtual camera during both the camera path creation and reproduction phases, enabling precise control over the virtual camera's movement and composition through the use of camera parameters, including position, posture, and time, which can be adjusted by the operator.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the virtual camera moves freely to follow object movement, then the composition adaptability improves, but the operator cannot maintain desired composition control
Solution Approach 1:
The patent applies dynamics by making the virtual camera's movement speed adjustable and changeable during operation. The camera can switch between following object movement dynamically and maintaining fixed composition, allowing both adaptability and control to coexist through speed parameter adjustment
2Productivity
If the virtual camera follows object movement automatically, then the productivity improves, but the manufacturing precision of composition deteriorates
Solution Approach 1:
The patent changes the speed parameter of the virtual camera dynamically. When automatic object following is enabled, the camera speed can be adjusted to match object movement speed, allowing efficient viewpoint switching while maintaining composition precision through parameter control
3Ease of operation
If the playback speed is adjusted to match object movement, then the ease of operation improves, but the device complexity increases
Solution Approach 1:
The system provides self-service by automatically adjusting the playback speed to match the virtual camera's movement speed when following objects. This automatic speed synchronization reduces operational complexity while improving ease of use, as the system self-regulates without requiring manual intervention
Data Source
Figure 1A~1B
Figure 2
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AI summary
A control is performed such that a speed of change of the virtual viewpoint which is changed in accordance with acceptance of an input according to a specific user operation during playback of the virtual viewpoint image at a first playback speed becomes lower than a speed of change of the virtual viewpoint which is changed in accordance with acceptance of an input according to the specific user operation during playback of the virtual viewpoint image at a second playback speed higher than the first playback speed.