def main():
# load data
options = get_parser().parse_args()
dataset = load_standard_dataset('lodopab', ordered=True)
ray_trafo = dataset.ray_trafo
global_results = []
sizes = [0.001, 0.01, 0.1, 1.00]
#sizes = [0.0001]
#sizes = [0.001]
#sizes = [0.01]
#sizes = [0.1]
for size_part in sizes:
cached_dataset = CachedDataset(dataset,
space=(ray_trafo.range,
ray_trafo.domain),
cache_files={
'train': [None, None],
'validation': [None, None]
},
size_part=size_part)
test_data = dataset.get_data_pairs('validation',
cached_dataset.validation_len)
print('validation size: %d' % len(test_data))
full_size_epochs = 10 if size_part >= 0.10 else 5
lr = 0.0001 if size_part >= 0.10 else 0.001
# scale number of epochs by 1/size_part, but maximum 1000 times as many
# epochs as for full size dataset
epochs = min(1000 * full_size_epochs,
int(1. / size_part * full_size_epochs))
reconstructor = LearnedPDReconstructor(
ray_trafo,
log_dir='lodopab_learnedpd_{}'.format(size_part),
save_best_learned_params_path=get_weights_path(
'lodopab_learnedpd_{}'.format(size_part)))
# create a Dival task table and run it
task_table = TaskTable()
task_table.append(reconstructor=reconstructor,
measures=[PSNR, SSIM],
test_data=test_data,
dataset=cached_dataset,
hyper_param_choices={
'batch_size': [1],
'epochs': [epochs],
'niter': [10],
'internal_ch': [64 if size_part >= 0.10 else 32],
'lr': [lr],
'lr_min': [lr],
'init_fbp': [True],
'init_frequency_scaling': [0.7]
})
results = task_table.run()
# save report
save_results_table(results, 'lodopab_learnedpd_{}'.format(size_part))
# select best parameters and save them
best_choice, best_error = select_hyper_best_parameters(results)
params = Params(best_choice)
params.save('lodopab_learnedpd_{}'.format(size_part))
# create a Dival task table and run it
task_table = TaskTable()
task_table.append(reconstructor=reconstructor,
measures=[PSNR, SSIM],
test_data=test_data,
dataset=cached_dataset,
hyper_param_choices={
'batch_size': [32],
'epochs': [epochs],
'niter': [10],
'lr': [0.001],
'lr_time_decay_rate': [3.2 * size_part]
})
results = task_table.run()
# save report
save_results_table(results, 'ellipses_learnedgd_{}'.format(size_part))
# select best parameters and save them
best_choice, best_error = select_hyper_best_parameters(results)
params = Params(best_choice)
params.save('ellipses_learnedgd_{}'.format(size_part))
# retrain the model with the optimal parameters and save the weights
# reconstructor = LearnedGDReconstructor(dataset.ray_trafo, hyper_params=params.dict)
# reconstructor.train(cached_dataset)
save_weights(reconstructor, 'ellipses_learnedgd_{}'.format(size_part))
