Compute PSNR given an MSE (we assume the maximum pixel value is 1).

Physically-based bsdf, both diffuse & specular lobes All tensors assume a shape of [minibatch_size, height, width, 3] or broadcastable equivalent

Physically-based specular bsdf. All tensors assume a shape of [minibatch_size, height, width, 3] or broadcastable equivalent unless otherwise note

Takes care of all corner cases and produces a final normal used for shading: - Constructs tangent space - Flips normal direction based

Compute MSE given a PSNR (we assume the maximum pixel value is 1).

adopt from gsplat: https://github.com/nerfstudio-project/gsplat/blob/main/gsplat/cuda/csrc/forward.cu

Taken from https://github.com/colmap/colmap/blob/dev/scripts/python/read_dense.py :param path: path to the colmap binary file. :return:

Recenter poses around the origin.

Render the scene. Background tensor (bg_color) must be on GPU!

sample angles from the sphere reference: https://zhuanlan.zhihu.com/p/25988652?group_id=828963677192491008