Gaussian Splatting-协方差矩阵与分解

[toc] 2D, 3D协方差矩阵与公式6, 协方差矩阵为什么可以分解为R和S 参考: https://stackoverflow.com/questions/65527024/create-covariance-matrix-using-ratio-and-rotation-degree https://github.com/graphdeco-inria/gaussian-spl...