| """ |
| Convert a parquet-format HuggingFace PMD dataset back to raw image files. |
| |
| Input: an HF repo ID OR a local directory saved with save_to_disk() |
| Output: PMD/{split}/{image,mask,edge}/<image_id>.{jpg,png} |
| """ |
| import argparse |
| from pathlib import Path |
|
|
| from datasets import load_dataset, load_from_disk |
|
|
| |
| SPLITS = { |
| "train": True, |
| "test": False, |
| } |
|
|
|
|
| def save_split(ds, split: str, has_edge: bool, out_dir: Path): |
| split_dir = out_dir / split |
| img_dir = split_dir / "image"; img_dir.mkdir(parents=True, exist_ok=True) |
| mask_dir = split_dir / "mask"; mask_dir.mkdir(parents=True, exist_ok=True) |
| edge_dir = split_dir / "edge" if has_edge else None |
| if edge_dir: edge_dir.mkdir(parents=True, exist_ok=True) |
|
|
| for i, sample in enumerate(ds): |
| stem = sample.get("image_id") or f"{i:06d}" |
|
|
| sample["image"].save(img_dir / f"{stem}.jpg") |
| sample["mask"].save(mask_dir / f"{stem}.png") |
|
|
| if has_edge and sample.get("edge") is not None: |
| sample["edge"].save(edge_dir / f"{stem}.png") |
|
|
| if (i + 1) % 100 == 0: |
| print(f" {i + 1}/{len(ds)}") |
|
|
| print(f" saved {len(ds)} samples -> {split_dir}") |
|
|
|
|
| def main(): |
| parser = argparse.ArgumentParser(description="Convert parquet PMD dataset to raw images") |
| src = parser.add_mutually_exclusive_group(required=True) |
| src.add_argument("--repo", help="HuggingFace repo ID, e.g. garrying/PMD") |
| src.add_argument("--local", help="Path to a directory saved with save_to_disk()") |
| parser.add_argument("--out", default="PMD", help="Output root directory (default: ./PMD)") |
| parser.add_argument("--splits", nargs="+", choices=list(SPLITS), default=list(SPLITS), |
| help="Which splits to convert (default: all)") |
| args = parser.parse_args() |
|
|
| out_dir = Path(args.out) |
| out_dir.mkdir(parents=True, exist_ok=True) |
|
|
| for split in args.splits: |
| has_edge = SPLITS[split] |
| print(f"\nLoading {split}...") |
|
|
| if args.repo: |
| ds = load_dataset(args.repo, split=split) |
| else: |
| ds = load_from_disk(str(Path(args.local) / split)) |
|
|
| print(f" {len(ds)} samples — saving images...") |
| save_split(ds, split, has_edge, out_dir) |
|
|
| print(f"\nDone! Raw files in: {out_dir.resolve()}") |
|
|
|
|
| if __name__ == "__main__": |
| main() |
|
|
