A decoupled heavy-light modeling and rendering method based on bipolar Gaussian field

By introducing a decoupled relighting modeling method using a bipolar Gaussian field, the problem of coupling between lighting and geometry in traditional 3DGS technology is solved. This achieves decoupling of lighting and geometry and flexible control of spatial lighting, improving the flexibility and practicality of rendering effects.

CN122176146APending Publication Date: 2026-06-09HEFEI UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
HEFEI UNIV OF TECH
Filing Date
2026-02-11
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

In traditional 3DGS technology, lighting information is highly coupled with geometric structure, which means that the lighting distribution cannot exist independently of the geometric structure, the position or intensity of the light source cannot be flexibly changed, and there is a lack of spatially varied lighting expression methods.

Method used

By introducing independently operable positive and negative contrasting Gaussian light fields, the decoupling of lighting and geometry is achieved by constructing a bipolar Gaussian field, and the algebraic control of spatial lighting is realized by optimizing material properties and light field parameters through backpropagation.

Benefits of technology

It achieves decoupling of lighting and geometry, allowing flexible changes to the position and intensity of light sources, and enabling quick switching between multiple lighting schemes without retraining the model, thus improving the flexibility and practicality of rendering effects.

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Abstract

The application discloses a kind of decoupling heavy illumination modeling and rendering method based on bipolarity Gaussian field, comprising: step 1, the parameter of three-dimensional Gaussian point is constructed and optimized, and the geometric Gaussian field is obtained;Step 2, keep the geometric Gaussian field parameter unchanged, introduce the material property parameter irrelevant to illumination for each geometric Gaussian point;Step 3, construct bipolarity illumination Gaussian light field independent of geometric Gaussian field, bipolarity illumination Gaussian light field includes positive and negative illumination Gaussian light field, and each illumination Gaussian light field includes parameter set;Step 4, in the current rendering process, according to the spatial position of geometric Gaussian point, material property parameter, bipolarity illumination Gaussian light field parameter set, the radiation contribution of positive and negative illumination Gaussian is calculated and algebraic superposition is carried out, and the current rendering result under the current spatial variation illumination effect is obtained;Step 5, optimization material property parameter, bipolarity illumination Gaussian light field parameter set, obtain the optimal rendering result under the optimal spatial variation illumination effect.
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