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import os
import numpy as np
import torch
from torch.utils.data import Dataset
import torch.nn.functional as F
import torch.multiprocessing as mp
class GridDataset(Dataset):
def __init__(self, dataset, target: str, root_dir: str, internal_resolution: int):
super().__init__()
self.dataset = dataset
self.target = target
self.root_dir = root_dir
self.internal_resolution = internal_resolution
def __len__(self):
return len(self.dataset)
def __getitem__(self, idx: int):
target = self.dataset.iloc[idx][self.target]
filename = self.dataset.iloc[idx]['3d_grid']
try:
numpy_file = np.load(os.path.join(self.root_dir, filename))
torch_np = torch.from_numpy(numpy_file)
torch_np = torch_np.unsqueeze(0).unsqueeze(0).float() # Convert to float and move to appropriate device
interpolated_data = F.interpolate(input=torch_np, size=(self.internal_resolution, self.internal_resolution, self.internal_resolution), mode='trilinear')
# Apply tanh and log operations
# interpolated_data_tanh = torch.tanh(interpolated_data)
interpolated_data_log = torch.log(interpolated_data + 1).squeeze(0) # Adding 1 to avoid log(0)
return interpolated_data_log, target
except Exception as e:
print(f"Error loading file '{filename}': {e}")
return None |