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        cppe-5.py
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            # coding=utf-8
         
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            # Copyright 2021 The HuggingFace Datasets Authors and the current dataset script contributor.
         
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            #
         
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            # Licensed under the Apache License, Version 2.0 (the "License");
         
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            # you may not use this file except in compliance with the License.
         
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            # You may obtain a copy of the License at
         
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            #
         
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            #     http://www.apache.org/licenses/LICENSE-2.0
         
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            #
         
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            # Unless required by applicable law or agreed to in writing, software
         
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            # distributed under the License is distributed on an "AS IS" BASIS,
         
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            # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
         
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            # See the License for the specific language governing permissions and
         
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            # limitations under the License.
         
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            """CPPE-5 dataset."""
         
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            import collections
         
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            import json
         
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            import os
         
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            import datasets
         
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            _CITATION = """\
         
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            @misc{dagli2021cppe5,
         
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                  title={CPPE-5: Medical Personal Protective Equipment Dataset},
         
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                  author={Rishit Dagli and Ali Mustufa Shaikh},
         
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                  year={2021},
         
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                  eprint={2112.09569},
         
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                  archivePrefix={arXiv},
         
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                  primaryClass={cs.CV}
         
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            }
         
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            """
         
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            _DESCRIPTION = """\
         
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            CPPE - 5 (Medical Personal Protective Equipment) is a new challenging dataset with the goal
         
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            to allow the study of subordinate categorization of medical personal protective equipments,
         
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            which is not possible with other popular data sets that focus on broad level categories.
         
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            """
         
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            _HOMEPAGE = "https://sites.google.com/view/cppe5"
         
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            _LICENSE = "Unknown"
         
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            _URL = "https://drive.google.com/uc?id=1MGnaAfbckUmigGUvihz7uiHGC6rBIbvr"
         
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            _CATEGORIES = ["Coverall", "Face_Shield", "Gloves", "Goggles", "Mask"]
         
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            class CPPE5(datasets.GeneratorBasedBuilder):
         
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                """CPPE - 5 dataset."""
         
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                VERSION = datasets.Version("1.0.0")
         
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                def _info(self):
         
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                    features = datasets.Features(
         
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                        {
         
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                            "image_id": datasets.Value("int64"),
         
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                            "image": datasets.Image(),
         
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                            "width": datasets.Value("int32"),
         
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                            "height": datasets.Value("int32"),
         
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                            "objects": datasets.Sequence(
         
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                                {
         
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                                    "id": datasets.Value("int64"),
         
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                                    "area": datasets.Value("int64"),
         
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                                    "bbox": datasets.Sequence(datasets.Value("float32"), length=4),
         
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                                    "category": datasets.ClassLabel(names=_CATEGORIES),
         
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                                }
         
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                            ),
         
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                        }
         
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                    )
         
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                    return datasets.DatasetInfo(
         
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                        description=_DESCRIPTION,
         
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                        features=features,
         
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                        homepage=_HOMEPAGE,
         
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                        license=_LICENSE,
         
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                        citation=_CITATION,
         
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                    )
         
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                def _split_generators(self, dl_manager):
         
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                    archive = dl_manager.download(_URL)
         
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                    return [
         
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                        datasets.SplitGenerator(
         
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                            name=datasets.Split.TRAIN,
         
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                            gen_kwargs={
         
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                                "annotation_file_path": "annotations/train.json",
         
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                                "files": dl_manager.iter_archive(archive),
         
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                            },
         
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                        ),
         
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                        datasets.SplitGenerator(
         
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                            name=datasets.Split.TEST,
         
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                            gen_kwargs={
         
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                                "annotation_file_path": "annotations/test.json",
         
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                                "files": dl_manager.iter_archive(archive),
         
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                            },
         
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                        ),
         
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                    ]
         
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                def _generate_examples(self, annotation_file_path, files):
         
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                    def process_annot(annot, category_id_to_category):
         
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                        return {
         
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                            "id": annot["id"],
         
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                            "area": annot["area"],
         
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                            "bbox": annot["bbox"],
         
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                            "category": category_id_to_category[annot["category_id"]],
         
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                        }
         
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                    image_id_to_image = {}
         
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                    idx = 0
         
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                    # This loop relies on the ordering of the files in the archive:
         
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                    # Annotation files come first, then the images.
         
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                    for path, f in files:
         
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                        file_name = os.path.basename(path)
         
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                        if path == annotation_file_path:
         
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                            annotations = json.load(f)
         
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                            category_id_to_category = {category["id"]: category["name"] for category in annotations["categories"]}
         
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                            image_id_to_annotations = collections.defaultdict(list)
         
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                            for annot in annotations["annotations"]:
         
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                                image_id_to_annotations[annot["image_id"]].append(annot)
         
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                            image_id_to_image = {annot["file_name"]: annot for annot in annotations["images"]}
         
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                        elif file_name in image_id_to_image:
         
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                            image = image_id_to_image[file_name]
         
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                            objects = [
         
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                                process_annot(annot, category_id_to_category) for annot in image_id_to_annotations[image["id"]]
         
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                            ]
         
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                            yield idx, {
         
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                                "image_id": image["id"],
         
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                                "image": {"path": path, "bytes": f.read()},
         
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                                "width": image["width"],
         
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                                "height": image["height"],
         
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                                "objects": objects,
         
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                            }
         
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                            idx += 1
         
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