Grangeat-based 2D/3D image registration

For setup instructions, see the README on GitHub.

Conventions obeyed by the implementations are detailed in Conventions.

The PyTorch extension

This library is a PyTorch extension, providing a number of functions for:

• grid sampling of 3-dimensional tensors with different flexibilities to torch.nn.functional.grid_sample,
• evaluating approximations of Radon transforms of 2- and 3-D images, and
• resampling of 3D sinograms and evaluation of similarity metrics between images for the purposes of 2D/3D image registration (see paper referenced in the README).

The functions are documented here: PyTorch Functions