Source code for torchvision.tv_tensors._image
from __future__ import annotations
from typing import Any, Optional, Union
import PIL.Image
import torch
from ._tv_tensor import TVTensor
[docs]class Image(TVTensor):
""":class:`torch.Tensor` subclass for images.
.. note::
In the :ref:`transforms <transforms>`, ``Image`` instances are largely
interchangeable with pure :class:`torch.Tensor`. See
:ref:`this note <passthrough_heuristic>` for more details.
Args:
data (tensor-like, PIL.Image.Image): Any data that can be turned into a tensor with :func:`torch.as_tensor` as
well as PIL images.
dtype (torch.dtype, optional): Desired data type. If omitted, will be inferred from
``data``.
device (torch.device, optional): Desired device. If omitted and ``data`` is a
:class:`torch.Tensor`, the device is taken from it. Otherwise, the image is constructed on the CPU.
requires_grad (bool, optional): Whether autograd should record operations. If omitted and
``data`` is a :class:`torch.Tensor`, the value is taken from it. Otherwise, defaults to ``False``.
"""
def __new__(
cls,
data: Any,
*,
dtype: Optional[torch.dtype] = None,
device: Optional[Union[torch.device, str, int]] = None,
requires_grad: Optional[bool] = None,
) -> Image:
if isinstance(data, PIL.Image.Image):
from torchvision.transforms.v2 import functional as F
data = F.pil_to_tensor(data)
tensor = cls._to_tensor(data, dtype=dtype, device=device, requires_grad=requires_grad)
if tensor.ndim < 2:
raise ValueError
elif tensor.ndim == 2:
tensor = tensor.unsqueeze(0)
return tensor.as_subclass(cls)
def __repr__(self, *, tensor_contents: Any = None) -> str: # type: ignore[override]
return self._make_repr()