Surround View Generation Using Virtual Camera Projection
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Solution Overview
Problem
Existing systems face challenges in generating a comprehensive surround view from multiple camera inputs, particularly in scenarios where installing cameras at desired locations is impractical or costly, limiting the ability to capture and display images or videos of environments effectively.
Innovation Solution
The Any World View system renders an output image from a plurality of input images taken from different locations, allowing for a virtual perspective view that can be specified by spatial coordinates, pose specifications, and other parameters, enabling the creation of a seamless and distortion-corrected surround view without the need for physical cameras at every desired location.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If cameras are installed at desired locations to capture comprehensive surround views, then the quality and coverage of the surround view image is improved, but the cost and complexity of the system increases
Solution Approach 1:
The patent creates a virtual copy of the camera system through software rendering. Instead of installing physical cameras at every desired viewpoint, the system uses projective geometry to mathematically synthesize images from a virtual camera positioned anywhere in 3D space. This virtual camera copy reproduces the effect of physical cameras without the installation complexity, allowing comprehensive surround views to be generated from a limited set of physical camera inputs.
Solution Approach 2:
The patent introduces a projection surface as an intermediary between the physical cameras and the final surround view image. The projection surface acts as a virtual canvas where images from multiple physical cameras are mapped and blended using projective transformations. This intermediary allows the system to achieve comprehensive view coverage by mathematically projecting camera feeds onto a virtual surface, eliminating the need for physical cameras at every viewpoint.
2Loss of information
If multiple cameras are used to capture images from different locations, then the completeness of the surround view is improved, but the difficulty of processing and rendering the images increases
Solution Approach 1:
The patent changes the parameter space by working in projective geometry rather than simple pixel manipulation. By representing images in terms of projective coordinates and transformation matrices, the system can efficiently handle multiple camera inputs. The key parameter change is using homogeneous coordinates and projective transformation matrices to map between different camera views and the projection surface, which simplifies the mathematical operations needed to blend multiple images while maintaining complete environmental coverage.
3Adaptability or versatility
If virtual perspectives from any location are generated, then the flexibility and adaptability of the system is improved, but the computational requirements and processing time increase
Solution Approach 1:
The patent performs preliminary action by pre-calculating and storing the projection mappings between physical cameras and the projection surface. During runtime, when a virtual viewpoint is requested, the system only needs to apply pre-computed transformation parameters rather than calculating projections from scratch. This preliminary setup of projection matrices and mapping relationships enables rapid generation of virtual perspectives from any location, significantly reducing real-time rendering time while maintaining full viewpoint flexibility.
Data Source
AI summary
Methods and systems for rendering an output image from a plurality of input images. The plurality of input images is received, and each input image is taken from a different first location. A view specification for rendering the output image is received, and the view specification includes at least a second location. The second location is different from each of the first locations. An output image is rendered based at least in part on the plurality of input images and the view specification, and the output image includes an image of a region as seen from the second location. The output image is displayed on a display.