Datasets:
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from datasets import (
GeneratorBasedBuilder, DatasetInfo, SplitGenerator, Split,
Features, Value, Sequence, Image, Version # ← 多了 Version
)
import os, json
class TLPD(GeneratorBasedBuilder):
VERSION = Version("0.0.3") # ✔ 正確型別
def _info(self):
return DatasetInfo(
description="Taiwan License Plate Dataset with LabelMe polygon annotations.",
features=Features({
"image": Image(), # 顯示在 Viewer
"label": Value("string"), # 顯示在 Viewer
# ↓➜ 轉成字串，Viewer 就能看；模型端再 json.loads() 還原即可
"points": Value("string"),
}),
)
def _split_generators(self, dl_manager):
root = dl_manager.manual_dir or dl_manager.download_and_extract({})
return [SplitGenerator(
name=Split.TRAIN,
gen_kwargs={
"images_dir": os.path.join(root, "images"),
"labels_dir": os.path.join(root, "labels"),
},
)]
def _generate_examples(self, images_dir, labels_dir):
for fname in sorted(os.listdir(labels_dir)):
if not fname.endswith(".json"):
continue
with open(os.path.join(labels_dir, fname), "r") as f:
meta = json.load(f)
shape = meta["shapes"][0] # 只有一個 polygon
yield fname[:-5], {
"image": os.path.join(images_dir, meta["imagePath"]),
"label": shape["label"], # "carplate"
"points": json.dumps(shape["points"]), # <- 字串
}
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