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Fix HuggingFaceDataLoader mask casting for point cloud datasets #88

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Merged
js2552 merged 1 commit into from
Sep 12, 2026
Merged

Fix HuggingFaceDataLoader mask casting for point cloud datasets #88

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8 changes: 5 additions & 3 deletions agml/data/hf_loader.py
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Original file line number Diff line number Diff line change
Expand Up @@ -3,7 +3,7 @@
from typing import List, Union

try:
from datasets import load_dataset, DatasetDict, Image, Sequence, ClassLabel
from datasets import load_dataset, DatasetDict, Image, Sequence, ClassLabel, Array2D
except ImportError:
raise ImportError(
"The `datasets` library is required to use the HuggingFaceDataLoader. "
Expand Down Expand Up @@ -80,8 +80,10 @@ def _cast_single(self, ds):
if "image" in features and not isinstance(features["image"], Image):
ds = ds.cast_column("image", Image())

# A "mask" column is always a pixel map — cast unconditionally.
if "mask" in features and not isinstance(features["mask"], Image):
# A "mask" column is a pixel map for image datasets, but a per-point
# label array (Array2D) for point cloud datasets. Only cast to
# Image() when it isn't already a numeric array type.
if "mask" in features and not isinstance(features["mask"], (Image, Array2D)):
ds = ds.cast_column("mask", Image())

return ds
Expand Down
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