data/datasets/image_classification/stl10.py

from ..data_aug import cifar_like_image_train_aug, cifar_like_image_test_aug
from ..ab_dataset import ABDataset
from ..dataset_split import train_val_split
from torchvision.datasets import STL10 as RawSTL10
from typing import Dict, List, Optional
from torchvision.transforms import Compose
from utils.common.others import HiddenPrints

from ..registery import dataset_register


@dataset_register(
    name='STL10', 
    classes=['airplane', 'bird', 'car', 'cat', 'deer', 'dog', 'horse', 'monkey', 'ship', 'truck'], 
    task_type='Image Classification',
    object_type='Generic Object',
    class_aliases=[],
    shift_type=None
)
class STL10(ABDataset):    
    def create_dataset(self, root_dir: str, split: str, transform: Optional[Compose], 
                       classes: List[str], ignore_classes: List[str], idx_map: Optional[Dict[int, int]]):
        if transform is None:
            transform = cifar_like_image_train_aug() if split == 'train' else cifar_like_image_test_aug()
            self.transform = transform
        
        with HiddenPrints():
            dataset = RawSTL10(root_dir, 'train' if split != 'test' else 'test', transform=transform, download=True)
        
        if len(ignore_classes) > 0: 
            for ignore_class in ignore_classes:
                dataset.data = dataset.data[dataset.labels != classes.index(ignore_class)]
                dataset.labels = dataset.labels[dataset.labels != classes.index(ignore_class)]
        
        if idx_map is not None:
            # note: the code below seems correct but has bug!
            # for old_idx, new_idx in idx_map.items():
            #     dataset.targets[dataset.targets == old_idx] = new_idx
                
            for ti, t in enumerate(dataset.labels):
                dataset.labels[ti] = idx_map[t]
        
        if split != 'test':
            dataset = train_val_split(dataset, split)
        return dataset