Camera External Parameter Matrix in NPZ Files

[CrescentVelvet]

Camera External Parameter Matrix in NPZ Files, world_mat.
The row vector length of the 3 * 3 rotation matrix of this matrix is not 1, but more than 1000.
May I ask why this is.
I want to use my own dataset to understand how to handle the camera external parameter matrix to ensure smooth program operation.

[DSaurus]

Sorry for the delayed response, as I was busy with another project. "world_mat" can be considered as the projection matrix. It is obtained by multiplying the intrinsic and extrinsic camera parameters, which may result in larger values in the first three dimensions. Its definition aligns with the camera matrix in the NeuS dataset. Additionally, we have included a preprocessing code in the "scripts" folder that converts OpenCV camera parameters to our dataset camera parameters. Please feel free to refer to it for help.