Delete ICDAR-2011.py
Browse files- ICDAR-2011.py +0 -119
ICDAR-2011.py
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"""Dataset class for Individuality Of Handwriting dataset."""
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import itertools
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import pathlib
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import zipfile
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import tqdm
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from datasets.tasks import ImageClassification
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import datasets
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_BASE_URLS = {
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"train": "http://iapr-tc11.org/dataset/ICDAR_SignatureVerification/SigComp2011/sigComp2011-trainingSet.zip",
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"test": "http://iapr-tc11.org/dataset/ICDAR_SignatureVerification/SigComp2011/sigComp2011-test.zip"
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}
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_BASE_URLS_PWD = b"I hereby accept the SigComp 2011 disclaimer."
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_HOMEPAGE = "http://iapr-tc11.org/mediawiki/index.php/ICDAR_2011_Signature_Verification_Competition_(SigComp2011)"
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_DESCRIPTION = """
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The collection contains simultaneously acquired online and offline samples.
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The collection contains offline and online signature samples.
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The offline dataset comprises PNG images, scanned at 400 dpi, RGB color.
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The online dataset comprises ascii files with the format: X, Y, Z (per line).
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"""
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_NAMES = [
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"genuine",
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"forgeries",
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]
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class ICDAR2011(datasets.GeneratorBasedBuilder):
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"""ICDAR-2011 Images dataset."""
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def _info(self):
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return datasets.DatasetInfo(
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description=_DESCRIPTION,
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features=datasets.Features(
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{
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"image": datasets.Image(),
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"label": datasets.ClassLabel(names=_NAMES),
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"forger": datasets.Value("int32"),
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"writer": datasets.Value("uint32"),
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"attempt": datasets.Value("uint32"),
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}
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),
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supervised_keys=("image", "label"),
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homepage=_HOMEPAGE,
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task_templates=[ImageClassification(image_column="image", label_column="label")],
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)
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def _split_generators(self, dl_manager):
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train_archive_path = pathlib.Path(dl_manager.download(_BASE_URLS["train"]))
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test_archive_path = pathlib.Path(dl_manager.download(_BASE_URLS["test"]))
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with zipfile.ZipFile(train_archive_path, 'r') as zf:
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train_dir = train_archive_path.parent / "extracted" / train_archive_path.name
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print(train_dir)
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for member in tqdm.tqdm(zf.infolist(), desc="Extracting training data"):
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try:
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if not pathlib.Path(train_dir / member.filename).exists():
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zf.extract(member, train_dir, pwd=_BASE_URLS_PWD)
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except zipfile.error:
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print("Error extracting", member.filename)
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zf.close()
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with zipfile.ZipFile(test_archive_path, 'r') as zf:
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test_dir = test_archive_path.parent / "extracted" / test_archive_path.name
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for member in tqdm.tqdm(zf.infolist(), desc="Extracting test data"):
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try:
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if not pathlib.Path(test_dir / member.filename).exists():
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zf.extract(member, test_dir, pwd=_BASE_URLS_PWD)
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except zipfile.error:
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print("Error extracting", member.filename)
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zf.close()
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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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"data_dir": train_dir,
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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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"data_dir": test_dir,
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},
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),
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]
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def _generate_examples(self, data_dir):
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"""Generate images and labels for splits."""
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rglob_lowercase = pathlib.Path(data_dir).rglob("*.png")
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rglob_uppercase = pathlib.Path(data_dir).rglob("*.PNG")
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rglob = itertools.chain(rglob_lowercase, rglob_uppercase)
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for index, filepath in enumerate(rglob):
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filename = filepath.with_suffix("").name
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prefix, attempt = filename.split("_")
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if len(prefix) == 7:
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forger = prefix[:4]
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writer = prefix[4:]
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label = "forgeries"
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else:
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writer = prefix
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forger = -1
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label = "genuine"
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yield index, {
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"image": str(filepath),
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"label": label,
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"forger": forger,
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"writer": writer,
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"attempt": attempt,
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}
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