3D Rendering Method Using Matched Image for Indirect Light Sampling
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Solution Overview
Problem
Current 3D rendering methods face challenges in efficiently rendering realistic illumination effects by accurately sampling and arranging indirect light sources in complex environments with multiple direct light sources, leading to increased processing time and repetitive sampling in identical regions.
Innovation Solution
A 3D rendering method and apparatus that render a 3D model by sampling indirect light sources from a matched image generated based on scene information from multiple viewpoints of direct light sources, using techniques like importance sampling to reduce redundant sampling and improve image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If indirect light sources are sampled from multiple direct light source viewpoints separately, then illumination accuracy is improved, but processing time increases and redundant sampling occurs
Solution Approach 1:
The patent merges multiple viewpoint images into a single matched image that contains illumination information from all direct light sources. Instead of sampling indirect light sources separately from each viewpoint, the system combines the scene information first and performs a single sampling operation, eliminating redundant processing while maintaining comprehensive illumination accuracy.
Solution Approach 2:
The patent performs preliminary scene matching and image alignment before the indirect light source sampling step. By pre-processing the multiple viewpoint images to create a matched image with consolidated illumination data, the system avoids repeating sampling operations and reduces processing time while preserving illumination accuracy.
2Reliability
If indirect light sources are sampled from each direct light source viewpoint, then complete illumination coverage is achieved, but redundant sampling in identical regions increases processing complexity
Solution Approach 1:
The patent combines multiple viewpoint images into a single matched image that consolidates illumination information from all direct light sources. This merging process eliminates redundant sampling in identical regions while maintaining complete illumination coverage, as the matched image contains comprehensive scene information from all viewpoints in a unified structure.
3Measurement precision
If multiple viewpoint images are processed separately for indirect light sampling, then sampling thoroughness is improved, but image quality consistency deteriorates due to repetitive sampling
Solution Approach 1:
The patent performs preliminary matching and alignment of multiple viewpoint images before sampling, creating a unified matched image with consistent geometry and illumination characteristics. This pre-processing ensures that subsequent sampling operations produce consistent image quality across all regions, while the matched image structure preserves thorough sampling information from all viewpoints.
Data Source
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AI summary
A three-dimensional (3D) rendering method for rendering a 3D model includes rendering a 3D model from each viewpoint of direct light sources, obtaining scene information on scenes rendered from each viewpoint of the direct light sources, generating a matched image in which the scenes are matched based on the scene information, and sampling at least one indirect light source from the matched image.