Software Open Access

Gratopy 0.1

Kristian Bredies; Richard Huber

The gratopy (Graz accelerated tomographic projections for Python) toolbox is a Python3 software package for the efficient and high-quality computation of Radon transforms, fanbeam transforms as well as the associated backprojections. The included operators are based on pixel-driven projection methods which were shown to possess favorable approximation properties. The toolbox offers a powerful parallel OpenCL/GPU implementation which admits high execution speed and allows for seamless integration into PyOpenCL. Gratopy can efficiently be combined with other PyOpenCL code and is well-suited for the development of iterative tomographic reconstruction approaches, in particular, for those involving optimization algorithms.


  • Easy-to-use tomographic projection toolbox.
  • High-quality 2D projection operators.
  • Fast projection due to custom OpenCL/GPU implementation.
  • Seamless integration into PyOpenCL.
  • Basic iterative reconstruction schemes included (Landweber, CG, total variation).
  • Comprehensive documentation, tests and example code.
Files (1.4 MB)
Name Size
1.4 MB Download
All versions This version
Views 14185
Downloads 105
Data volume 13.3 MB6.8 MB
Unique views 9069
Unique downloads 105


Cite as