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# coding=utf-8 | |
# Copyright 2022 The HuggingFace Inc. team. | |
# | |
# 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 | |
# limitations under the License. | |
import copy | |
import json | |
import os | |
import warnings | |
from io import BytesIO | |
from typing import Any, Dict, Iterable, List, Optional, Tuple, Union | |
import numpy as np | |
import requests | |
from .dynamic_module_utils import custom_object_save | |
from .feature_extraction_utils import BatchFeature as BaseBatchFeature | |
from .image_transforms import center_crop, normalize, rescale | |
from .image_utils import ChannelDimension | |
from .utils import ( | |
IMAGE_PROCESSOR_NAME, | |
PushToHubMixin, | |
add_model_info_to_auto_map, | |
cached_file, | |
copy_func, | |
download_url, | |
is_offline_mode, | |
is_remote_url, | |
is_vision_available, | |
logging, | |
) | |
if is_vision_available(): | |
from PIL import Image | |
logger = logging.get_logger(__name__) | |
# TODO: Move BatchFeature to be imported by both image_processing_utils and image_processing_utils | |
# We override the class string here, but logic is the same. | |
class BatchFeature(BaseBatchFeature): | |
r""" | |
Holds the output of the image processor specific `__call__` methods. | |
This class is derived from a python dictionary and can be used as a dictionary. | |
Args: | |
data (`dict`): | |
Dictionary of lists/arrays/tensors returned by the __call__ method ('pixel_values', etc.). | |
tensor_type (`Union[None, str, TensorType]`, *optional*): | |
You can give a tensor_type here to convert the lists of integers in PyTorch/TensorFlow/Numpy Tensors at | |
initialization. | |
""" | |
# TODO: (Amy) - factor out the common parts of this and the feature extractor | |
class ImageProcessingMixin(PushToHubMixin): | |
""" | |
This is an image processor mixin used to provide saving/loading functionality for sequential and image feature | |
extractors. | |
""" | |
_auto_class = None | |
def __init__(self, **kwargs): | |
"""Set elements of `kwargs` as attributes.""" | |
# Pop "processor_class" as it should be saved as private attribute | |
self._processor_class = kwargs.pop("processor_class", None) | |
# Additional attributes without default values | |
for key, value in kwargs.items(): | |
try: | |
setattr(self, key, value) | |
except AttributeError as err: | |
logger.error(f"Can't set {key} with value {value} for {self}") | |
raise err | |
def _set_processor_class(self, processor_class: str): | |
"""Sets processor class as an attribute.""" | |
self._processor_class = processor_class | |
def from_pretrained( | |
cls, | |
pretrained_model_name_or_path: Union[str, os.PathLike], | |
cache_dir: Optional[Union[str, os.PathLike]] = None, | |
force_download: bool = False, | |
local_files_only: bool = False, | |
token: Optional[Union[str, bool]] = None, | |
revision: str = "main", | |
**kwargs, | |
): | |
r""" | |
Instantiate a type of [`~image_processing_utils.ImageProcessingMixin`] from an image processor. | |
Args: | |
pretrained_model_name_or_path (`str` or `os.PathLike`): | |
This can be either: | |
- a string, the *model id* of a pretrained image_processor hosted inside a model repo on | |
huggingface.co. Valid model ids can be located at the root-level, like `bert-base-uncased`, or | |
namespaced under a user or organization name, like `dbmdz/bert-base-german-cased`. | |
- a path to a *directory* containing a image processor file saved using the | |
[`~image_processing_utils.ImageProcessingMixin.save_pretrained`] method, e.g., | |
`./my_model_directory/`. | |
- a path or url to a saved image processor JSON *file*, e.g., | |
`./my_model_directory/preprocessor_config.json`. | |
cache_dir (`str` or `os.PathLike`, *optional*): | |
Path to a directory in which a downloaded pretrained model image processor should be cached if the | |
standard cache should not be used. | |
force_download (`bool`, *optional*, defaults to `False`): | |
Whether or not to force to (re-)download the image processor files and override the cached versions if | |
they exist. | |
resume_download (`bool`, *optional*, defaults to `False`): | |
Whether or not to delete incompletely received file. Attempts to resume the download if such a file | |
exists. | |
proxies (`Dict[str, str]`, *optional*): | |
A dictionary of proxy servers to use by protocol or endpoint, e.g., `{'http': 'foo.bar:3128', | |
'http://hostname': 'foo.bar:4012'}.` The proxies are used on each request. | |
token (`str` or `bool`, *optional*): | |
The token to use as HTTP bearer authorization for remote files. If `True`, or not specified, will use | |
the token generated when running `huggingface-cli login` (stored in `~/.huggingface`). | |
revision (`str`, *optional*, defaults to `"main"`): | |
The specific model version to use. It can be a branch name, a tag name, or a commit id, since we use a | |
git-based system for storing models and other artifacts on huggingface.co, so `revision` can be any | |
identifier allowed by git. | |
<Tip> | |
To test a pull request you made on the Hub, you can pass `revision="refs/pr/<pr_number>". | |
</Tip> | |
return_unused_kwargs (`bool`, *optional*, defaults to `False`): | |
If `False`, then this function returns just the final image processor object. If `True`, then this | |
functions returns a `Tuple(image_processor, unused_kwargs)` where *unused_kwargs* is a dictionary | |
consisting of the key/value pairs whose keys are not image processor attributes: i.e., the part of | |
`kwargs` which has not been used to update `image_processor` and is otherwise ignored. | |
subfolder (`str`, *optional*, defaults to `""`): | |
In case the relevant files are located inside a subfolder of the model repo on huggingface.co, you can | |
specify the folder name here. | |
kwargs (`Dict[str, Any]`, *optional*): | |
The values in kwargs of any keys which are image processor attributes will be used to override the | |
loaded values. Behavior concerning key/value pairs whose keys are *not* image processor attributes is | |
controlled by the `return_unused_kwargs` keyword parameter. | |
Returns: | |
A image processor of type [`~image_processing_utils.ImageProcessingMixin`]. | |
Examples: | |
```python | |
# We can't instantiate directly the base class *ImageProcessingMixin* so let's show the examples on a | |
# derived class: *CLIPImageProcessor* | |
image_processor = CLIPImageProcessor.from_pretrained( | |
"openai/clip-vit-base-patch32" | |
) # Download image_processing_config from huggingface.co and cache. | |
image_processor = CLIPImageProcessor.from_pretrained( | |
"./test/saved_model/" | |
) # E.g. image processor (or model) was saved using *save_pretrained('./test/saved_model/')* | |
image_processor = CLIPImageProcessor.from_pretrained("./test/saved_model/preprocessor_config.json") | |
image_processor = CLIPImageProcessor.from_pretrained( | |
"openai/clip-vit-base-patch32", do_normalize=False, foo=False | |
) | |
assert image_processor.do_normalize is False | |
image_processor, unused_kwargs = CLIPImageProcessor.from_pretrained( | |
"openai/clip-vit-base-patch32", do_normalize=False, foo=False, return_unused_kwargs=True | |
) | |
assert image_processor.do_normalize is False | |
assert unused_kwargs == {"foo": False} | |
```""" | |
kwargs["cache_dir"] = cache_dir | |
kwargs["force_download"] = force_download | |
kwargs["local_files_only"] = local_files_only | |
kwargs["revision"] = revision | |
use_auth_token = kwargs.pop("use_auth_token", None) | |
if use_auth_token is not None: | |
warnings.warn( | |
"The `use_auth_token` argument is deprecated and will be removed in v5 of Transformers.", FutureWarning | |
) | |
if token is not None: | |
raise ValueError( | |
"`token` and `use_auth_token` are both specified. Please set only the argument `token`." | |
) | |
token = use_auth_token | |
if token is not None: | |
kwargs["token"] = token | |
image_processor_dict, kwargs = cls.get_image_processor_dict(pretrained_model_name_or_path, **kwargs) | |
return cls.from_dict(image_processor_dict, **kwargs) | |
def save_pretrained(self, save_directory: Union[str, os.PathLike], push_to_hub: bool = False, **kwargs): | |
""" | |
Save an image processor object to the directory `save_directory`, so that it can be re-loaded using the | |
[`~image_processing_utils.ImageProcessingMixin.from_pretrained`] class method. | |
Args: | |
save_directory (`str` or `os.PathLike`): | |
Directory where the image processor JSON file will be saved (will be created if it does not exist). | |
push_to_hub (`bool`, *optional*, defaults to `False`): | |
Whether or not to push your model to the Hugging Face model hub after saving it. You can specify the | |
repository you want to push to with `repo_id` (will default to the name of `save_directory` in your | |
namespace). | |
kwargs (`Dict[str, Any]`, *optional*): | |
Additional key word arguments passed along to the [`~utils.PushToHubMixin.push_to_hub`] method. | |
""" | |
use_auth_token = kwargs.pop("use_auth_token", None) | |
if use_auth_token is not None: | |
warnings.warn( | |
"The `use_auth_token` argument is deprecated and will be removed in v5 of Transformers.", FutureWarning | |
) | |
if kwargs.get("token", None) is not None: | |
raise ValueError( | |
"`token` and `use_auth_token` are both specified. Please set only the argument `token`." | |
) | |
kwargs["token"] = use_auth_token | |
if os.path.isfile(save_directory): | |
raise AssertionError(f"Provided path ({save_directory}) should be a directory, not a file") | |
os.makedirs(save_directory, exist_ok=True) | |
if push_to_hub: | |
commit_message = kwargs.pop("commit_message", None) | |
repo_id = kwargs.pop("repo_id", save_directory.split(os.path.sep)[-1]) | |
repo_id = self._create_repo(repo_id, **kwargs) | |
files_timestamps = self._get_files_timestamps(save_directory) | |
# If we have a custom config, we copy the file defining it in the folder and set the attributes so it can be | |
# loaded from the Hub. | |
if self._auto_class is not None: | |
custom_object_save(self, save_directory, config=self) | |
# If we save using the predefined names, we can load using `from_pretrained` | |
output_image_processor_file = os.path.join(save_directory, IMAGE_PROCESSOR_NAME) | |
self.to_json_file(output_image_processor_file) | |
logger.info(f"Image processor saved in {output_image_processor_file}") | |
if push_to_hub: | |
self._upload_modified_files( | |
save_directory, | |
repo_id, | |
files_timestamps, | |
commit_message=commit_message, | |
token=kwargs.get("token"), | |
) | |
return [output_image_processor_file] | |
def get_image_processor_dict( | |
cls, pretrained_model_name_or_path: Union[str, os.PathLike], **kwargs | |
) -> Tuple[Dict[str, Any], Dict[str, Any]]: | |
""" | |
From a `pretrained_model_name_or_path`, resolve to a dictionary of parameters, to be used for instantiating a | |
image processor of type [`~image_processor_utils.ImageProcessingMixin`] using `from_dict`. | |
Parameters: | |
pretrained_model_name_or_path (`str` or `os.PathLike`): | |
The identifier of the pre-trained checkpoint from which we want the dictionary of parameters. | |
subfolder (`str`, *optional*, defaults to `""`): | |
In case the relevant files are located inside a subfolder of the model repo on huggingface.co, you can | |
specify the folder name here. | |
Returns: | |
`Tuple[Dict, Dict]`: The dictionary(ies) that will be used to instantiate the image processor object. | |
""" | |
cache_dir = kwargs.pop("cache_dir", None) | |
force_download = kwargs.pop("force_download", False) | |
resume_download = kwargs.pop("resume_download", False) | |
proxies = kwargs.pop("proxies", None) | |
token = kwargs.pop("token", None) | |
use_auth_token = kwargs.pop("use_auth_token", None) | |
local_files_only = kwargs.pop("local_files_only", False) | |
revision = kwargs.pop("revision", None) | |
subfolder = kwargs.pop("subfolder", "") | |
from_pipeline = kwargs.pop("_from_pipeline", None) | |
from_auto_class = kwargs.pop("_from_auto", False) | |
if use_auth_token is not None: | |
warnings.warn( | |
"The `use_auth_token` argument is deprecated and will be removed in v5 of Transformers.", FutureWarning | |
) | |
if token is not None: | |
raise ValueError( | |
"`token` and `use_auth_token` are both specified. Please set only the argument `token`." | |
) | |
token = use_auth_token | |
user_agent = {"file_type": "image processor", "from_auto_class": from_auto_class} | |
if from_pipeline is not None: | |
user_agent["using_pipeline"] = from_pipeline | |
if is_offline_mode() and not local_files_only: | |
logger.info("Offline mode: forcing local_files_only=True") | |
local_files_only = True | |
pretrained_model_name_or_path = str(pretrained_model_name_or_path) | |
is_local = os.path.isdir(pretrained_model_name_or_path) | |
if os.path.isdir(pretrained_model_name_or_path): | |
image_processor_file = os.path.join(pretrained_model_name_or_path, IMAGE_PROCESSOR_NAME) | |
if os.path.isfile(pretrained_model_name_or_path): | |
resolved_image_processor_file = pretrained_model_name_or_path | |
is_local = True | |
elif is_remote_url(pretrained_model_name_or_path): | |
image_processor_file = pretrained_model_name_or_path | |
resolved_image_processor_file = download_url(pretrained_model_name_or_path) | |
else: | |
image_processor_file = IMAGE_PROCESSOR_NAME | |
try: | |
# Load from local folder or from cache or download from model Hub and cache | |
resolved_image_processor_file = cached_file( | |
pretrained_model_name_or_path, | |
image_processor_file, | |
cache_dir=cache_dir, | |
force_download=force_download, | |
proxies=proxies, | |
resume_download=resume_download, | |
local_files_only=local_files_only, | |
token=token, | |
user_agent=user_agent, | |
revision=revision, | |
subfolder=subfolder, | |
) | |
except EnvironmentError: | |
# Raise any environment error raise by `cached_file`. It will have a helpful error message adapted to | |
# the original exception. | |
raise | |
except Exception: | |
# For any other exception, we throw a generic error. | |
raise EnvironmentError( | |
f"Can't load image processor for '{pretrained_model_name_or_path}'. If you were trying to load" | |
" it from 'https://huggingface.co/models', make sure you don't have a local directory with the" | |
f" same name. Otherwise, make sure '{pretrained_model_name_or_path}' is the correct path to a" | |
f" directory containing a {IMAGE_PROCESSOR_NAME} file" | |
) | |
try: | |
# Load image_processor dict | |
with open(resolved_image_processor_file, "r", encoding="utf-8") as reader: | |
text = reader.read() | |
image_processor_dict = json.loads(text) | |
except json.JSONDecodeError: | |
raise EnvironmentError( | |
f"It looks like the config file at '{resolved_image_processor_file}' is not a valid JSON file." | |
) | |
if is_local: | |
logger.info(f"loading configuration file {resolved_image_processor_file}") | |
else: | |
logger.info( | |
f"loading configuration file {image_processor_file} from cache at {resolved_image_processor_file}" | |
) | |
if "auto_map" in image_processor_dict and not is_local: | |
image_processor_dict["auto_map"] = add_model_info_to_auto_map( | |
image_processor_dict["auto_map"], pretrained_model_name_or_path | |
) | |
return image_processor_dict, kwargs | |
def from_dict(cls, image_processor_dict: Dict[str, Any], **kwargs): | |
""" | |
Instantiates a type of [`~image_processing_utils.ImageProcessingMixin`] from a Python dictionary of parameters. | |
Args: | |
image_processor_dict (`Dict[str, Any]`): | |
Dictionary that will be used to instantiate the image processor object. Such a dictionary can be | |
retrieved from a pretrained checkpoint by leveraging the | |
[`~image_processing_utils.ImageProcessingMixin.to_dict`] method. | |
kwargs (`Dict[str, Any]`): | |
Additional parameters from which to initialize the image processor object. | |
Returns: | |
[`~image_processing_utils.ImageProcessingMixin`]: The image processor object instantiated from those | |
parameters. | |
""" | |
image_processor_dict = image_processor_dict.copy() | |
return_unused_kwargs = kwargs.pop("return_unused_kwargs", False) | |
# The `size` parameter is a dict and was previously an int or tuple in feature extractors. | |
# We set `size` here directly to the `image_processor_dict` so that it is converted to the appropriate | |
# dict within the image processor and isn't overwritten if `size` is passed in as a kwarg. | |
if "size" in kwargs and "size" in image_processor_dict: | |
image_processor_dict["size"] = kwargs.pop("size") | |
if "crop_size" in kwargs and "crop_size" in image_processor_dict: | |
image_processor_dict["crop_size"] = kwargs.pop("crop_size") | |
image_processor = cls(**image_processor_dict) | |
# Update image_processor with kwargs if needed | |
to_remove = [] | |
for key, value in kwargs.items(): | |
if hasattr(image_processor, key): | |
setattr(image_processor, key, value) | |
to_remove.append(key) | |
for key in to_remove: | |
kwargs.pop(key, None) | |
logger.info(f"Image processor {image_processor}") | |
if return_unused_kwargs: | |
return image_processor, kwargs | |
else: | |
return image_processor | |
def to_dict(self) -> Dict[str, Any]: | |
""" | |
Serializes this instance to a Python dictionary. | |
Returns: | |
`Dict[str, Any]`: Dictionary of all the attributes that make up this image processor instance. | |
""" | |
output = copy.deepcopy(self.__dict__) | |
output["image_processor_type"] = self.__class__.__name__ | |
return output | |
def from_json_file(cls, json_file: Union[str, os.PathLike]): | |
""" | |
Instantiates a image processor of type [`~image_processing_utils.ImageProcessingMixin`] from the path to a JSON | |
file of parameters. | |
Args: | |
json_file (`str` or `os.PathLike`): | |
Path to the JSON file containing the parameters. | |
Returns: | |
A image processor of type [`~image_processing_utils.ImageProcessingMixin`]: The image_processor object | |
instantiated from that JSON file. | |
""" | |
with open(json_file, "r", encoding="utf-8") as reader: | |
text = reader.read() | |
image_processor_dict = json.loads(text) | |
return cls(**image_processor_dict) | |
def to_json_string(self) -> str: | |
""" | |
Serializes this instance to a JSON string. | |
Returns: | |
`str`: String containing all the attributes that make up this feature_extractor instance in JSON format. | |
""" | |
dictionary = self.to_dict() | |
for key, value in dictionary.items(): | |
if isinstance(value, np.ndarray): | |
dictionary[key] = value.tolist() | |
# make sure private name "_processor_class" is correctly | |
# saved as "processor_class" | |
_processor_class = dictionary.pop("_processor_class", None) | |
if _processor_class is not None: | |
dictionary["processor_class"] = _processor_class | |
return json.dumps(dictionary, indent=2, sort_keys=True) + "\n" | |
def to_json_file(self, json_file_path: Union[str, os.PathLike]): | |
""" | |
Save this instance to a JSON file. | |
Args: | |
json_file_path (`str` or `os.PathLike`): | |
Path to the JSON file in which this image_processor instance's parameters will be saved. | |
""" | |
with open(json_file_path, "w", encoding="utf-8") as writer: | |
writer.write(self.to_json_string()) | |
def __repr__(self): | |
return f"{self.__class__.__name__} {self.to_json_string()}" | |
def register_for_auto_class(cls, auto_class="AutoImageProcessor"): | |
""" | |
Register this class with a given auto class. This should only be used for custom image processors as the ones | |
in the library are already mapped with `AutoImageProcessor `. | |
<Tip warning={true}> | |
This API is experimental and may have some slight breaking changes in the next releases. | |
</Tip> | |
Args: | |
auto_class (`str` or `type`, *optional*, defaults to `"AutoImageProcessor "`): | |
The auto class to register this new image processor with. | |
""" | |
if not isinstance(auto_class, str): | |
auto_class = auto_class.__name__ | |
import transformers.models.auto as auto_module | |
if not hasattr(auto_module, auto_class): | |
raise ValueError(f"{auto_class} is not a valid auto class.") | |
cls._auto_class = auto_class | |
def fetch_images(self, image_url_or_urls: Union[str, List[str]]): | |
""" | |
Convert a single or a list of urls into the corresponding `PIL.Image` objects. | |
If a single url is passed, the return value will be a single object. If a list is passed a list of objects is | |
returned. | |
""" | |
headers = { | |
"User-Agent": ( | |
"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0" | |
" Safari/537.36" | |
) | |
} | |
if isinstance(image_url_or_urls, list): | |
return [self.fetch_images(x) for x in image_url_or_urls] | |
elif isinstance(image_url_or_urls, str): | |
response = requests.get(image_url_or_urls, stream=True, headers=headers) | |
response.raise_for_status() | |
return Image.open(BytesIO(response.content)) | |
else: | |
raise ValueError(f"only a single or a list of entries is supported but got type={type(image_url_or_urls)}") | |
class BaseImageProcessor(ImageProcessingMixin): | |
def __init__(self, **kwargs): | |
super().__init__(**kwargs) | |
def __call__(self, images, **kwargs) -> BatchFeature: | |
"""Preprocess an image or a batch of images.""" | |
return self.preprocess(images, **kwargs) | |
def preprocess(self, images, **kwargs) -> BatchFeature: | |
raise NotImplementedError("Each image processor must implement its own preprocess method") | |
def rescale( | |
self, | |
image: np.ndarray, | |
scale: float, | |
data_format: Optional[Union[str, ChannelDimension]] = None, | |
input_data_format: Optional[Union[str, ChannelDimension]] = None, | |
**kwargs, | |
) -> np.ndarray: | |
""" | |
Rescale an image by a scale factor. image = image * scale. | |
Args: | |
image (`np.ndarray`): | |
Image to rescale. | |
scale (`float`): | |
The scaling factor to rescale pixel values by. | |
data_format (`str` or `ChannelDimension`, *optional*): | |
The channel dimension format for the output image. If unset, the channel dimension format of the input | |
image is used. Can be one of: | |
- `"channels_first"` or `ChannelDimension.FIRST`: image in (num_channels, height, width) format. | |
- `"channels_last"` or `ChannelDimension.LAST`: image in (height, width, num_channels) format. | |
input_data_format (`ChannelDimension` or `str`, *optional*): | |
The channel dimension format for the input image. If unset, the channel dimension format is inferred | |
from the input image. Can be one of: | |
- `"channels_first"` or `ChannelDimension.FIRST`: image in (num_channels, height, width) format. | |
- `"channels_last"` or `ChannelDimension.LAST`: image in (height, width, num_channels) format. | |
Returns: | |
`np.ndarray`: The rescaled image. | |
""" | |
return rescale(image, scale=scale, data_format=data_format, input_data_format=input_data_format, **kwargs) | |
def normalize( | |
self, | |
image: np.ndarray, | |
mean: Union[float, Iterable[float]], | |
std: Union[float, Iterable[float]], | |
data_format: Optional[Union[str, ChannelDimension]] = None, | |
input_data_format: Optional[Union[str, ChannelDimension]] = None, | |
**kwargs, | |
) -> np.ndarray: | |
""" | |
Normalize an image. image = (image - image_mean) / image_std. | |
Args: | |
image (`np.ndarray`): | |
Image to normalize. | |
mean (`float` or `Iterable[float]`): | |
Image mean to use for normalization. | |
std (`float` or `Iterable[float]`): | |
Image standard deviation to use for normalization. | |
data_format (`str` or `ChannelDimension`, *optional*): | |
The channel dimension format for the output image. If unset, the channel dimension format of the input | |
image is used. Can be one of: | |
- `"channels_first"` or `ChannelDimension.FIRST`: image in (num_channels, height, width) format. | |
- `"channels_last"` or `ChannelDimension.LAST`: image in (height, width, num_channels) format. | |
input_data_format (`ChannelDimension` or `str`, *optional*): | |
The channel dimension format for the input image. If unset, the channel dimension format is inferred | |
from the input image. Can be one of: | |
- `"channels_first"` or `ChannelDimension.FIRST`: image in (num_channels, height, width) format. | |
- `"channels_last"` or `ChannelDimension.LAST`: image in (height, width, num_channels) format. | |
Returns: | |
`np.ndarray`: The normalized image. | |
""" | |
return normalize( | |
image, mean=mean, std=std, data_format=data_format, input_data_format=input_data_format, **kwargs | |
) | |
def center_crop( | |
self, | |
image: np.ndarray, | |
size: Dict[str, int], | |
data_format: Optional[Union[str, ChannelDimension]] = None, | |
input_data_format: Optional[Union[str, ChannelDimension]] = None, | |
**kwargs, | |
) -> np.ndarray: | |
""" | |
Center crop an image to `(size["height"], size["width"])`. If the input size is smaller than `crop_size` along | |
any edge, the image is padded with 0's and then center cropped. | |
Args: | |
image (`np.ndarray`): | |
Image to center crop. | |
size (`Dict[str, int]`): | |
Size of the output image. | |
data_format (`str` or `ChannelDimension`, *optional*): | |
The channel dimension format for the output image. If unset, the channel dimension format of the input | |
image is used. Can be one of: | |
- `"channels_first"` or `ChannelDimension.FIRST`: image in (num_channels, height, width) format. | |
- `"channels_last"` or `ChannelDimension.LAST`: image in (height, width, num_channels) format. | |
input_data_format (`ChannelDimension` or `str`, *optional*): | |
The channel dimension format for the input image. If unset, the channel dimension format is inferred | |
from the input image. Can be one of: | |
- `"channels_first"` or `ChannelDimension.FIRST`: image in (num_channels, height, width) format. | |
- `"channels_last"` or `ChannelDimension.LAST`: image in (height, width, num_channels) format. | |
""" | |
size = get_size_dict(size) | |
if "height" not in size or "width" not in size: | |
raise ValueError(f"The size dictionary must have keys 'height' and 'width'. Got {size.keys()}") | |
return center_crop( | |
image, | |
size=(size["height"], size["width"]), | |
data_format=data_format, | |
input_data_format=input_data_format, | |
**kwargs, | |
) | |
VALID_SIZE_DICT_KEYS = ({"height", "width"}, {"shortest_edge"}, {"shortest_edge", "longest_edge"}, {"longest_edge"}) | |
def is_valid_size_dict(size_dict): | |
if not isinstance(size_dict, dict): | |
return False | |
size_dict_keys = set(size_dict.keys()) | |
for allowed_keys in VALID_SIZE_DICT_KEYS: | |
if size_dict_keys == allowed_keys: | |
return True | |
return False | |
def convert_to_size_dict( | |
size, max_size: Optional[int] = None, default_to_square: bool = True, height_width_order: bool = True | |
): | |
# By default, if size is an int we assume it represents a tuple of (size, size). | |
if isinstance(size, int) and default_to_square: | |
if max_size is not None: | |
raise ValueError("Cannot specify both size as an int, with default_to_square=True and max_size") | |
return {"height": size, "width": size} | |
# In other configs, if size is an int and default_to_square is False, size represents the length of | |
# the shortest edge after resizing. | |
elif isinstance(size, int) and not default_to_square: | |
size_dict = {"shortest_edge": size} | |
if max_size is not None: | |
size_dict["longest_edge"] = max_size | |
return size_dict | |
# Otherwise, if size is a tuple it's either (height, width) or (width, height) | |
elif isinstance(size, (tuple, list)) and height_width_order: | |
return {"height": size[0], "width": size[1]} | |
elif isinstance(size, (tuple, list)) and not height_width_order: | |
return {"height": size[1], "width": size[0]} | |
elif size is None and max_size is not None: | |
if default_to_square: | |
raise ValueError("Cannot specify both default_to_square=True and max_size") | |
return {"longest_edge": max_size} | |
raise ValueError(f"Could not convert size input to size dict: {size}") | |
def get_size_dict( | |
size: Union[int, Iterable[int], Dict[str, int]] = None, | |
max_size: Optional[int] = None, | |
height_width_order: bool = True, | |
default_to_square: bool = True, | |
param_name="size", | |
) -> dict: | |
""" | |
Converts the old size parameter in the config into the new dict expected in the config. This is to ensure backwards | |
compatibility with the old image processor configs and removes ambiguity over whether the tuple is in (height, | |
width) or (width, height) format. | |
- If `size` is tuple, it is converted to `{"height": size[0], "width": size[1]}` or `{"height": size[1], "width": | |
size[0]}` if `height_width_order` is `False`. | |
- If `size` is an int, and `default_to_square` is `True`, it is converted to `{"height": size, "width": size}`. | |
- If `size` is an int and `default_to_square` is False, it is converted to `{"shortest_edge": size}`. If `max_size` | |
is set, it is added to the dict as `{"longest_edge": max_size}`. | |
Args: | |
size (`Union[int, Iterable[int], Dict[str, int]]`, *optional*): | |
The `size` parameter to be cast into a size dictionary. | |
max_size (`Optional[int]`, *optional*): | |
The `max_size` parameter to be cast into a size dictionary. | |
height_width_order (`bool`, *optional*, defaults to `True`): | |
If `size` is a tuple, whether it's in (height, width) or (width, height) order. | |
default_to_square (`bool`, *optional*, defaults to `True`): | |
If `size` is an int, whether to default to a square image or not. | |
""" | |
if not isinstance(size, dict): | |
size_dict = convert_to_size_dict(size, max_size, default_to_square, height_width_order) | |
logger.info( | |
f"{param_name} should be a dictionary on of the following set of keys: {VALID_SIZE_DICT_KEYS}, got {size}." | |
f" Converted to {size_dict}.", | |
) | |
else: | |
size_dict = size | |
if not is_valid_size_dict(size_dict): | |
raise ValueError( | |
f"{param_name} must have one of the following set of keys: {VALID_SIZE_DICT_KEYS}, got {size_dict.keys()}" | |
) | |
return size_dict | |
ImageProcessingMixin.push_to_hub = copy_func(ImageProcessingMixin.push_to_hub) | |
if ImageProcessingMixin.push_to_hub.__doc__ is not None: | |
ImageProcessingMixin.push_to_hub.__doc__ = ImageProcessingMixin.push_to_hub.__doc__.format( | |
object="image processor", object_class="AutoImageProcessor", object_files="image processor file" | |
) | |