"I'm done with ptycho" -- George in August 🤦

[gvarnavi]

This PR adds a number of new features, namely:

• virtual-detector iterative ptychography
  • see Segmented and Other Geometry Detector Ptychography #683 from @juliedactyl
• slim_preprocess functionality in most (all?) ptycho classes
  • this circumvents preprocess and allows one to pass in preprocessed arrays directly
• parallax reorganization
  • allows one to input arbitrary aberrations during initialization
  • fit aberrations recursively by radial order
  • better memory-management during upsampling
• adds (slightly expensive) 3D Fourier-rotation in ptycho-tomo
• adds multiprocessed direct ptychography classes
  • SSB: (phase-compensated) single-side band reconstruction
    • including recursive aberration-fitting
  • WDD: Wigner distribution deconvolution
  • OBF: optimum bright-field STEM

Will add tutorial notebooks to check/review below later today.

[gvarnavi]

Updated parallax tutorials for review: updated_parallax_tutorials.zip

[gvarnavi]

Direct ptychography tutorials for review: direct_ptychography_tutorials.zip

[gvarnavi]

Virtual detector ptychography notebook for review: virtual_detector_ptycho_notebook.zip

[gvarnavi]

Alrighty, this should be ready to review.

A lot of this code has been used in the wild this past month by various collaborators, so perhaps they can help us review this (I've added three sets of notebooks above to help with the review):

• @TomaSusi -- can you have a look at the direct ptycho classes, please?
• @kucukogluberk -- can you have a look at the parallax updates, please?
• @juliedactyl -- can you have a look at the virtual-detector ptycho updates, please?

Thanks!