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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source

resample

def 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
)->torch.Tensor:

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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source

get_pinhole_camera

def get_pinhole_camera(
    drr:diffdrr.drr.DRR, pose:diffdrr.pose.RigidTransform, dtype:torch.dtype=torch.float64
)->__main__.PinholeCamera: