nip.image_classification.data.ImageClassificationDataset

class nip.image_classification.data.ImageClassificationDataset(hyper_params: HyperParameters, settings: ExperimentSettings, protocol_handler: ProtocolHandler, train: bool = True)

A dataset for the image classification task.

Uses a torchvision dataset, and removes all the classes apart from two (determined by hyper_params.image_classification.selected_classes).

Shapes

The dataset is a TensorDict with the following keys:

• “image” (dataset_size num_channels height width): The images in the dataset.

• “x” (dataset_size max_message_rounds height width): The pixel features, which are all zeros.

• “y” (dataset_size): The labels of the images.

Methods Summary

__getitem__(index)
__getitems__(index)
__init__(hyper_params, settings, ...[, train])
__len__()
__repr__()	Return repr(self).
_download()	Download the raw data.
_get_pretrained_cache_dir(model_name)	Get the path to the directory with the cached pretrained embeddings.
_get_pretrained_metadata_path(model_name)	Get the path to the metadata file for the pretrained embeddings.
_get_pretrained_mmap_path(model_name)	Get the path to the memory-mapped tensor for the pretrained embeddings.
add_pretrained_embeddings(model_name, ...[, ...])	Add pretrained embeddings to the dataset and cache them.
build_tensor_dict()	Build the dataset as a TensorDict from the raw data.
build_torch_dataset(*, transform)	Build the TorchVision dataset.
get_pretrained_embedding_dtype(model_name)	Get the dtype of the embeddings for a pretrained model.
get_pretrained_embedding_feature_shape(...)	Get the feature shape of the embeddings for a pretrained model.
load_pretrained_embeddings(model_name)	Load cached embeddings for a pretrained model.

Attributes

binarification_method	The method used to binarify the dataset.
binarification_seed	The seed to use for shuffling the dataset before merging.
device	The device on which the dataset is stored.
instance_keys	The keys specifying the input instance.
keys	The keys (field names) in the dataset.
pretrained_embeddings_dir	The path to the directory containing cached pretrained model embeddings.
pretrained_model_names	The names of the pretrained models for which we have computed embeddings.
processed_dir	The path to the directory containing the processed data.
raw_dir	The path to the directory containing the raw data.
selected_classes	The two classes selected for binary classification.
x_dtype
y_dtype

Methods

__getitem__(index: None | int | slice | str | Tensor | List[Any] | Tuple[Any, ...]) → TensorDict | Tensor

__getitems__(index: None | int | slice | str | Tensor | List[Any] | Tuple[Any, ...]) → TensorDict | Tensor

__init__(hyper_params: HyperParameters, settings: ExperimentSettings, protocol_handler: ProtocolHandler, train: bool = True)

__len__() → int

__repr__() → str

Return repr(self).

_download()

Download the raw data.

_get_pretrained_cache_dir(model_name: str) → Path

Get the path to the directory with the cached pretrained embeddings.

Parameters:

model_name (str) – The name of the pretrained model.

Returns:

cache_dir (Path) – The path to the cache directory.

_get_pretrained_metadata_path(model_name: str) → Path

Get the path to the metadata file for the pretrained embeddings.

Parameters:

model_name (str) – The name of the pretrained model.

Returns:

metadata_path (Path) – The path to the metadata file.

_get_pretrained_mmap_path(model_name: str) → Path

Get the path to the memory-mapped tensor for the pretrained embeddings.

Parameters:

model_name (str) – The name of the pretrained model.

Returns:

mmap_path (Path) – The path to the memory-mapped tensor.

add_pretrained_embeddings(model_name: str, full_embeddings: Tensor, overwrite_cache: bool = False)

Add pretrained embeddings to the dataset and cache them.

Parameters:

• model_name (str) – The name of the pretrained model.

• full_embeddings (Tensor) – The embeddings generated from the full original dataset, before any rearrangement or filtering.

• overwrite_cache (bool, default=False) – Whether to overwrite the cached embeddings if they already exist.

build_tensor_dict() → TensorDict

Build the dataset as a TensorDict from the raw data.

Returns:

dataset (TensorDict) – The dataset as a TensorDict, with the keys “image”, “x”, and “y”.

build_torch_dataset(*, transform: Any | None) → TorchVisionDatasetWrapper

Build the TorchVision dataset.

Parameters:

transform (Optional[Any]) – The transform to apply to the images.

Returns:

dataset (TorchVisionDatasetWrapper) – The TorchVision dataset.

get_pretrained_embedding_dtype(model_name: str) → dtype

Get the dtype of the embeddings for a pretrained model.

Parameters:

model_name (str) – The name of the pretrained model.

Returns:

dtype (torch.dtype) – The dtype of the embeddings.

get_pretrained_embedding_feature_shape(model_name: str) → Size

Get the feature shape of the embeddings for a pretrained model.

The feature shape is the tuple of dimensions of the embeddings excluding the batch dimension.

Parameters:

model_name (str) – The name of the pretrained model.

Returns:

shape (torch.Size) – The shape of the embeddings.

load_pretrained_embeddings(model_name: str)

Load cached embeddings for a pretrained model.

Parameters:

model_name (str) – The name of the pretrained model.

Raises:

CachedPretrainedEmbeddingsNotFound – If the cached embeddings are not found.