help of predict about camera parameter?

[zhangzhenyu-zzy]

hello,i find we predict the camera parameter[z,tx,ty],and then we get the wold coordinate[tx,ty,2×focal_length/img_size×z],and we get this picture just use the world coordinate in render,

now,i want to use pytorch3d to replace the original renderer,but in pytorch3d,the setting in camera should know the R and T,but we only konw the world coordinate [tx,ty,2×focal_length/img_size×z],can you help me,how can i use pytorch3d to get the same img(There can be no background image)

[zengwang430521]

Hi,
you may try:
R = torch.eye(3) and T = [tx,ty, 2×focal_length / (img_size×z)]