Light Field Offset Rendering for Faster Rasterized Capture
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Solution Overview
Problem
Existing light field rendering methods, particularly in offline renderers, face challenges with high computational requirements and long rendering times due to the lack of support for ray tracing in content creation tools, necessitating a more efficient rasterization approach for high-quality light field rendering.
Innovation Solution
A light field rendering method employing a light field offset scheme and pixel remapping technique, where a camera array is positioned at a retraction plane offset from the display plane to capture both inner and outer frustum volumes, followed by a pixel remapping function to shift the captured light field back to the display plane, reducing rendering times and processing requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If ray tracing is used for light field rendering, then rendering quality is improved, but computational power requirements and rendering time increase significantly
Solution Approach 1:
The patent replaces the ray tracing rendering approach with a rasterization-based light field rendering method. This substitution uses a camera array at a retraction plane to capture the light field, followed by pixel remapping to the display plane, avoiding the computational intensity of ray tracing while maintaining rendering quality through the offset scheme and remapping technique
Solution Approach 2:
The patent uses a camera array to capture multiple views of the light field from different positions at the retraction plane. These captured images are then copied and remapped to reconstruct the light field at the display plane, eliminating the need for computationally expensive ray tracing calculations
2Manufacturing precision
If ray tracing is used for light field rendering, then rendering quality is improved, but rendering time increases significantly
Solution Approach 1:
The patent replaces the ray tracing rendering approach with a rasterization-based light field rendering method. This substitution uses a camera array at a retraction plane to capture the light field, followed by pixel remapping to the display plane, avoiding the computational intensity of ray tracing while maintaining rendering quality through the offset scheme and remapping technique
Solution Approach 2:
The patent performs preliminary capture of the light field at the retraction plane using a camera array before rendering to the display plane. By capturing the light field information in advance at an offset position, the system reduces the computational work required during the final rendering stage, thereby reducing rendering time
3Manufacturing precision
If a camera array is positioned at the display plane to capture the light field, then the light field can be rendered, but the inner frustum volume cannot be captured
Solution Approach 1:
The patent positions the camera array at a retraction plane that is offset from the display plane along the optical axis (adding a depth dimension). This dimensional change allows the camera array to capture the inner frustum volume that would be occluded or inaccessible if cameras were positioned exactly at the display plane, thereby capturing the complete light field including previously inaccessible regions
Data Source
AI summary
A method for light field rendering of a 3D scene data. The rendering method comprises capturing a light field image at a retracted plane, parallel to the display plane, decoding a light field camera to produce a hogel camera for each hogel at the retraction plane to produce an integral image, and applying a pixel remapping technique to the pixels of the integral image for display on a light field display. The 3D scene is captured and remapped to adjust the perspective giving the illusion the image was taken at the display plane, allowing captured images to be displayed in both the inner frustum and outer frustum of a light field display, creating an immersive experience.