Single-Camera Volumetric Image Capture With Motion Path Metadata
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Solution Overview
Problem
Conventional photographic techniques fail to capture and reproduce the true feeling or understanding of a scene due to the lack of depth information from multiple viewpoints, and existing volumetric capture methods are cumbersome and data-intensive.
Innovation Solution
A method for creating a volumetric image by recording a series of images while moving a camera along a path, associating the images with motion path metadata, and assembling them into a package for playback at desired viewpoints, using metadata for alignment and interpolation to correct deviations and smooth displacements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single camera is moved along a path to capture a series of images, then the device complexity is reduced, but the manufacturing precision of the motion path is difficult to control
Solution Approach 1:
The patent introduces motion path metadata as an intermediary data structure that mediates between the captured images and the desired volumetric reconstruction. This metadata records the actual camera positions and orientations, serving as a bridge that allows flexible, non-rigid motion paths to be accurately represented and corrected during rendering, resolving the conflict between simple capture devices and precise alignment requirements
Solution Approach 2:
The system changes the parameter representation from rigid camera array geometry to flexible motion path trajectories. By parameterizing the camera positions and orientations as metadata that can be continuously adjusted and interpolated, the system allows arbitrary motion paths to be converted into precise volumetric data, transforming the constraint from physical alignment precision to computational parameter accuracy
2Ease of operation
If conventional photographic techniques are used, then the ease of operation is maintained, but the depth information from multiple viewpoints is lost
Solution Approach 1:
The patent adds the temporal dimension to the traditional 2D photograph by capturing a series of images over time as the camera moves through space. This transforms a single static image into a sequence of images with associated motion path metadata, effectively adding the fourth dimension (time) to capture volumetric information while maintaining the simplicity of single-camera operation
3Loss of information
If arrays of many cameras are used to capture volumetric images, then the depth information is preserved, but the device complexity and data processing requirements increase significantly
Solution Approach 1:
Instead of using multiple physical cameras to capture simultaneous viewpoints, the system uses a single camera to capture sequential images that are then computationally replicated and rendered to simulate multiple viewpoints. The motion path metadata enables the reconstruction of what multiple cameras would have captured, replacing physical redundancy with computational copying
4Ease of operation
If a camera moves along an arbitrary path, then the ease of operation is improved, but the alignment precision of images deteriorates
Solution Approach 1:
The system implements feedback by recording the actual motion path metadata during capture and using this recorded information to guide the rendering process. The metadata provides feedback about the true camera positions, allowing the rendering algorithm to compensate for any deviations from ideal paths and accurately reconstruct the volumetric scene from the captured images
Data Source
AI summary
A volumetric image of a scene can be created, in one embodiment, by recording, through a camera in a device, a series of images of the scene as the camera is moved along a path relative to the scene; during the recording, the device stores motion path metadata about the path, and the series of images is associated with the motion path metadata and a metadata label is associated with the series of images, the metadata label indicating that the recorded series of images represent a volumetric image of the scene. The series of images, the motion path metadata and the metadata label can be assembled into a package for distribution to devices that can view the volumetric image, which may be referred to as a limited volumetric image. The devices that receive the volumetric image can display the individual images in the series of images or as a video.