work on tryUpdates structure#124
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…ethod to choose the step sizes & parameter updates
- rename BatchImageDerivs to BatchGalaxyProfiles, removing some terms only required for derivatives - factor out code to produce BatchGalaxyProfiles and BatchImageParams in factored_optimizer.py - factor out code that renders galaxy profiles - sketch out the rest of tryUpdates
constrained_optimizer.py
by using getImage(use_gpu=True) and getInvError(use_gpu=True)
rounding error propagation from tractor/miscutils.py in lanczos filter logic. Use constrained_optimizer.py tryUpdates for now even though tryUpdates is now implemented in factored_optimizer.py since there are slight differences. Use GPU copies when avaialble of arrays and cache them. Float32 and complex64 and del arrays when done to make sure no OutOfMemoryExceptions. In batch_mixture_profiles, chunk data for 5D array F along dimension used to sum to Fsum for large arrays. Use gpu_lsqr_optimizer.py for background fitting.
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