utils

Utility functions

Image resampling

Using simple morphological operations, an X-ray image with some set of intrinsic parameters can be resampled with a different set of intrinsics.

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resample

 resample (img:torch.Tensor, focal_len:float, delx:float, x0:float=0,
           y0:float=0, new_focal_len:float=None, new_delx:float=None,
           new_x0:float=None, new_y0:float=None)

Resample an image with new intrinsic parameters.

Pinhole camera’s

Convert the intrinsic and extrinsic geometries, as implemented in DiffDRR, to a standard pinhole camera.

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get_pinhole_camera

 get_pinhole_camera (drr:diffdrr.drr.DRR,
                     pose:diffdrr.pose.RigidTransform,
                     dtype:torch.dtype=torch.float64)