Read and unpack the next bytes from a binary file. :param fid: :param num_bytes: Sum of combination of {2, 4, 8}, e.g. 2, 6, 16, 30, etc.

r"""Function that measures Learned Perceptual Image Patch Similarity (LPIPS). Arguments: x, y (torch.Tensor): the input tensors to co

Normalization helper function.

Pad [..., 3, 4] pose matrices with a homogeneous bottom row [0,0,0,1].

Save an image (probably RGB) in [0, 1] to disk as a uint8 PNG.

image: [C, H, W] data: [C, H, W] mask: [C, H, W]

image: [C, H, W] data: [C, H, W] mask: [C, H, W]

data: [1, C, H, W]

Calculate nearest point to all focal axes in poses.

Copied from Plenoxels Continuous learning rate decay function. Adapted from JaxNeRF The returned rate is lr_init when step=0 and lr_fina

Load an image and cast to float32.

Remove the homogeneous bottom row from [..., 4, 4] pose matrices.

Construct lookat view matrix.