Camera-Specific Background Video Replacement for Virtual Production
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Solution Overview
Problem
In virtual production systems using multiple cameras, the background video displayed on a large display does not change naturally with camera position and direction, leading to unnatural videos and potential overlap of backgrounds, resulting in incorrect monitor videos for each camera.
Innovation Solution
An information processing device with a video processing unit that replaces specific video portions with corresponding videos for each camera, generated in a time-division manner, ensuring appropriate background videos for each camera by real-time rendering and synchronization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a single background video is displayed on the large display for multiple cameras, then the system is simple to operate, but the background does not change naturally with camera position and direction, resulting in unnatural videos
Solution Approach 1:
The patent divides the single background video into multiple camera-specific background videos, where each background is rendered and displayed according to the specific position and imaging direction of each camera. This segmentation allows each camera to have its own customized background view, resolving the contradiction between operational simplicity and background naturalness.
Solution Approach 2:
The patent implements dynamic background rendering that automatically adjusts the background video content based on real-time camera position and imaging direction data. This dynamic adaptation ensures that each camera captures a natural-looking background corresponding to its actual viewpoint, eliminating the unnatural static background effect.
2Manufacturing precision
If background videos are generated for each camera position, then natural background appearance is achieved, but processing load increases due to multiple video generations
Solution Approach 1:
The patent performs preliminary rendering of camera-specific background videos before actual capture, using pre-acquired camera position and imaging direction information. This preliminary action allows the system to prepare appropriate backgrounds in advance, reducing real-time processing requirements while maintaining high accuracy in background-camera correspondence.
Solution Approach 2:
The patent creates simplified copies or representations of the main background video tailored to each camera's viewpoint, rather than processing complete high-resolution videos for each camera. This copying approach maintains the essential visual information needed for natural appearance while significantly reducing processing load.
3Productivity
If multiple cameras capture the same background video simultaneously, then high productivity is achieved, but background overlap occurs and monitor videos become incorrect
Solution Approach 1:
The patent assigns different local quality characteristics to background videos for each camera, where each background is specifically rendered to match its camera's position and imaging direction. This local customization ensures that each camera receives an appropriately tailored background, preventing overlap issues and ensuring correctness of monitor videos while maintaining simultaneous capture capability.
Solution Approach 2:
The patent introduces camera position and imaging direction data as intermediary information that mediates between the multiple cameras and the background video system. This intermediary data allows the system to correctly associate each camera with its appropriate background view, ensuring reliability of monitor videos while maintaining high productivity through simultaneous operation.
Data Source
AI summary
An information processing device, among videos obtained by capturing a display video on a display and an object separated from the display by a camera, the display displaying a corresponding video generated corresponding to one camera among a plurality of cameras and a specific video in a time-division manner, performs video processing of replacing the specific video with a corresponding video for a first captured video including the object and the specific video, the corresponding video being generated corresponding to a camera that captures the first captured video.