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map_classes_to_indices() ClassesToIndices() update #6468

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Merged
wyli merged 4 commits into from
May 5, 2023
Merged

map_classes_to_indices() ClassesToIndices() update #6468

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41d3f9f
map_classes_to_indices output torch.Tensor
myron May 4, 2023
60725cc
Merge remote-tracking branch 'upstream/dev' into mapclass
myron May 4, 2023
a8cb251
blake
myron May 5, 2023
537f510
mypy
myron May 5, 2023
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5 changes: 4 additions & 1 deletion monai/transforms/utils.py
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Original file line number Diff line number Diff line change
Expand Up @@ -409,7 +409,10 @@ def map_classes_to_indices(
if img_flat is not None:
label_flat = img_flat & label_flat
# no need to save the indices in GPU, otherwise, still need to move to CPU at runtime when crop by indices
cls_indices: NdarrayOrTensor = convert_data_type(nonzero(label_flat), device=torch.device("cpu"))[0]
output_type = torch.Tensor if isinstance(label, monai.data.MetaTensor) else None
cls_indices: NdarrayOrTensor = convert_data_type(
nonzero(label_flat), output_type=output_type, device=torch.device("cpu")
)[0]
if max_samples_per_class and len(cls_indices) > max_samples_per_class and len(cls_indices) > 1:
sample_id = np.round(np.linspace(0, len(cls_indices) - 1, max_samples_per_class)).astype(int)
indices.append(cls_indices[sample_id])
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