| # Copyright (c) MONAI Consortium | |
| # Licensed under the Apache License, Version 2.0 (the "License"); | |
| # you may not use this file except in compliance with the License. | |
| # You may obtain a copy of the License at | |
| # http://www.apache.org/licenses/LICENSE-2.0 | |
| # Unless required by applicable law or agreed to in writing, software | |
| # distributed under the License is distributed on an "AS IS" BASIS, | |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| # See the License for the specific language governing permissions and | |
| import monai | |
| import torch | |
| def compute_scale_factor(autoencoder, train_loader, device): | |
| with torch.no_grad(): | |
| check_data = monai.utils.first(train_loader) | |
| z = autoencoder.encode_stage_2_inputs(check_data["image"].to(device)) | |
| scale_factor = 1 / torch.std(z) | |
| return scale_factor.item() | |