Pre-integration Map for Real-time Skin Translucency Rendering

The patent pre-calculates and stores the correspondence between curvature values and color bands in a pre-integration map during an offline preparation stage. This eliminates the need for complex real-time calculations during rendering, as the system only needs to query pre-computed values based on the curvature of skin surfaces, thereby maintaining high rendering quality while reducing runtime resource consumption.

The patent creates a simplified copy of the complex light scattering phenomenon by representing it as a lookup table (pre-integration map) that maps curvature values to color bands. This copy captures the essential visual effect without requiring the computational complexity of the original physical simulation, enabling efficient real-time rendering with acceptable visual fidelity.

The patent pre-calculates the relationship between pixel positions, curvature, and corresponding color bands during an offline preparation phase. The pre-integration map stores this correspondence information, allowing the rendering system to quickly retrieve pre-computed results without performing complex real-time position calculations, thus reducing processing performance requirements while maintaining rendering accuracy.

The patent replaces expensive real-time computational resources with a lightweight lookup table structure. Instead of performing computationally intensive position calculations on terminal devices, the system uses a simple memory-based query approach that requires minimal processing power, making the solution feasible for resource-constrained environments.