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Update coco.py #12288

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c35fc13
Update coco.py
hossinasaadi Jan 9, 2025
5cd6965
Update coco.py
hossinasaadi Jan 9, 2025
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5 changes: 5 additions & 0 deletions mmdet/datasets/coco.py
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Original file line number Diff line number Diff line change
Expand Up @@ -69,6 +69,11 @@ def load_data_list(self) -> List[dict]:
# change with the order of the `classes`
self.cat_ids = self.coco.get_cat_ids(
cat_names=self.metainfo['classes'])

if len(self.cat_ids) == 0:
raise Exception(f"Can't find classes in \
annotation file {self.metainfo['classes']}")

self.cat2label = {cat_id: i for i, cat_id in enumerate(self.cat_ids)}
self.cat_img_map = copy.deepcopy(self.coco.cat_img_map)

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