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Browse files- GBI-16-4D.py +0 -184
GBI-16-4D.py
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import os
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import random
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from glob import glob
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import json
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from huggingface_hub import hf_hub_download
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from astropy.io import fits
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import datasets
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from datasets import DownloadManager
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from fsspec.core import url_to_fs
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_DESCRIPTION = (
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"GBI-16-4D is a dataset which is part of the AstroCompress project. It contains data "
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"assembled from the Sloan Digital SkySurvey (SDSS). Each FITS file contains a series "
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"of 800x800 pixel uint16 observations of the same portion of the Stripe82 field, "
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"taken in 5 bandpass filters (u, g, r, i, z) over time. The filenames give the "
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"starting run, field, camcol of the observations, the number of filtered images per "
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"timestep, and the number of timesteps. For example: "
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"`cube_center_run4203_camcol6_f44_35-5-800-800.fits` contains 35 frames of 800x800 "
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"pixel images in 5 bandpasses starting with run 4203, field 44, and camcol 6. "
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"The images are stored in the FITS standard."
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)
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_HOMEPAGE = "https://google.github.io/AstroCompress"
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_LICENSE = "CC BY 4.0"
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_URL = "https://huggingface.co/datasets/AstroCompress/GBI-16-4D/resolve/main/"
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_URLS = {
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"tiny": {
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"train": "./splits/tiny_train.jsonl",
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"test": "./splits/tiny_test.jsonl",
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},
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"full": {
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"train": "./splits/full_train.jsonl",
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"test": "./splits/full_test.jsonl",
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}
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}
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_REPO_ID = "AstroCompress/GBI-16-4D"
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class GBI_16_4D(datasets.GeneratorBasedBuilder):
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"""GBI-16-4D Dataset"""
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VERSION = datasets.Version("1.0.0")
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BUILDER_CONFIGS = [
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datasets.BuilderConfig(
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name="tiny",
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version=VERSION,
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description="A small subset of the data, to test downsteam workflows.",
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),
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datasets.BuilderConfig(
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name="full",
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version=VERSION,
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description="The full dataset",
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),
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]
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DEFAULT_CONFIG_NAME = "tiny"
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def __init__(self, **kwargs):
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super().__init__(version=self.VERSION, **kwargs)
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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.Array4D(shape=(None, 5, 800, 800), dtype="uint16"),
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"ra": datasets.Value("float64"),
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"dec": datasets.Value("float64"),
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"pixscale": datasets.Value("float64"),
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"ntimes": datasets.Value("int64"),
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"nbands": datasets.Value("int64"),
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"image_id": datasets.Value("string"),
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}
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),
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supervised_keys=None,
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homepage=_HOMEPAGE,
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license=_LICENSE,
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citation="TBD",
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)
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def _split_generators(self, dl_manager: DownloadManager):
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ret = []
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base_path = dl_manager._base_path
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locally_run = not base_path.startswith(datasets.config.HF_ENDPOINT)
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_, path = url_to_fs(base_path)
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for split in ["train", "test"]:
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if locally_run:
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split_file_location = os.path.normpath(os.path.join(path, _URLS[self.config.name][split]))
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split_file = dl_manager.download_and_extract(split_file_location)
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else:
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split_file = hf_hub_download(repo_id=_REPO_ID, filename=_URLS[self.config.name][split], repo_type="dataset")
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with open(split_file, encoding="utf-8") as f:
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data_filenames = []
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data_metadata = []
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for line in f:
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item = json.loads(line)
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data_filenames.append(item["image"])
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data_metadata.append({"ra": item["ra"],
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"dec": item["dec"],
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"pixscale": item["pixscale"],
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"ntimes": item["ntimes"],
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"nbands": item["nbands"],
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"image_id": item["image_id"]})
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if locally_run:
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data_urls = [os.path.normpath(os.path.join(path,data_filename)) for data_filename in data_filenames]
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data_files = [dl_manager.download(data_url) for data_url in data_urls]
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else:
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data_urls = data_filenames
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data_files = [hf_hub_download(repo_id=_REPO_ID, filename=data_url, repo_type="dataset") for data_url in data_urls]
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ret.append(
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datasets.SplitGenerator(
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name=datasets.Split.TRAIN if split == "train" else datasets.Split.TEST,
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gen_kwargs={"filepaths": data_files,
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"split_file": split_file,
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"split": split,
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"data_metadata": data_metadata},
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),
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)
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return ret
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def _generate_examples(self, filepaths, split_file, split, data_metadata):
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"""Generate GBI-16-4D examples"""
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for idx, (filepath, item) in enumerate(zip(filepaths, data_metadata)):
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task_instance_key = f"{self.config.name}-{split}-{idx}"
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with fits.open(filepath, memmap=False) as hdul:
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image_data = hdul[0].data.tolist()
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yield task_instance_key, {**{"image": image_data}, **item}
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def make_split_jsonl_files(config_type="tiny", data_dir="./data",
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outdir="./splits", seed=42):
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"""
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Create jsonl files for the GBI-16-4D dataset.
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config_type: str, default="tiny"
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The type of split to create. Options are "tiny" and "full".
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data_dir: str, default="./data"
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The directory where the FITS files are located.
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outdir: str, default="./splits"
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The directory where the jsonl files will be created.
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seed: int, default=42
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The seed for the random split.
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"""
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random.seed(seed)
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os.makedirs(outdir, exist_ok=True)
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fits_files = glob(os.path.join(data_dir, "*.fits"))
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random.shuffle(fits_files)
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if config_type == "tiny":
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train_files = fits_files[:2]
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test_files = fits_files[2:3]
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elif config_type == "full":
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split_idx = int(0.8 * len(fits_files))
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train_files = fits_files[:split_idx]
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test_files = fits_files[split_idx:]
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else:
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raise ValueError("Unsupported config_type. Use 'tiny' or 'full'.")
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def create_jsonl(files, split_name):
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output_file = os.path.join(outdir, f"{config_type}_{split_name}.jsonl")
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with open(output_file, "w") as out_f:
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for file in files:
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print(file, flush=True, end="...")
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with fits.open(file, memmap=False) as hdul:
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image_id = os.path.basename(file).split(".fits")[0]
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ra = hdul[0].header.get('CRVAL1', 0)
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dec = hdul[0].header.get('CRVAL2', 0)
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pixscale = hdul[0].header.get('CD1_2', 0.396)
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ntimes = hdul[0].data.shape[0]
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nbands = hdul[0].data.shape[1]
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item = {"image_id": image_id, "image": file, "ra": ra, "dec": dec,
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"pixscale": pixscale, "ntimes": ntimes, "nbands": nbands}
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out_f.write(json.dumps(item) + "\n")
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create_jsonl(train_files, "train")
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create_jsonl(test_files, "test")
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