Implement design for GAN-based reconstruction, e.g. CryoGAN

[harshit-gupta-cor]

Discussion to replace parts of CryoGAN repo with modules from compSPI/compSPI, compSPI/simSPI, and compSPI/ioSPI.

One possible structure:

1. CryoGAN/src/
   ctf.py --> import from simSPI/linear_simulator/ctf.py
   shift.py --> import from simSPI/linear_simulator/shift.py
   projector.py --> import from simSPI/linear_simulator/projector.py
   noise.py --> import from simSPI/linear_simulator/noise.py
   simulator.py --> import from simSPI/linear_simulator/simulator.py
   dataio.py--> move to ioSPI
   transforms.py --> import from compSPI/transforms.py

2. CryoGAN/
   utils.py --> Needs to be split into many different files with appropriate grouping and names.
   loss_utils.py --> Move to reconSPI
   modules.py --> Move to reconSPI
   ml_modules.py --> move to reconSPI
   save__image_utils --> move to ioSPI
   writer_utils --> Move to reconSPI

3. CryoGAN: (all below will be kept in the cryoGAN repo. This repo could also be moved to reconSPI.)
   configs/*
   main_cryogan.py
   cryogan_wrapper.py
   cryogan.py

[geoffwoollard]

1. LGTM

utils.py Needs to be split into many different files with appropriate grouping and names.
loss_utils.py will this eventually have other losses? the losses seemed specific to cryoGAN. but perhaps some general losses could go in compSPI, like general L2 loss etc, in an optimization module.
modules.py should definitely go in reconSPI. has discriminator
ml_modules.py --> I agree, move to reconSPI
save__image_utils --> ioSPI could have some visualize modules
writer_utils --> not really sure what this does. needs more documentation.

• If you do move cryoGAN to compSPI perhaps it makes sense to move the core functionality into reconSPI, since it is a reconstruction method.
• There could be some common methods on any reconstruction method that are used.