51 lines
1.4 KiB
Python
51 lines
1.4 KiB
Python
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#!/usr/bin/env python3
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"""
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Fix COCO annotation class IDs to be 0-based instead of 1-based.
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RF-DETR expects classes to start from 0 (background), but our annotations use 1-10.
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"""
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import json
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import sys
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from pathlib import Path
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def fix_class_ids(coco_data):
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"""Convert category IDs and annotation category_ids from 1-based to 0-based."""
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# Fix categories: change id from 1-10 to 0-9
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for cat in coco_data['categories']:
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cat['id'] -= 1
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# Fix annotations: change category_id from 1-10 to 0-9
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for ann in coco_data['annotations']:
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ann['category_id'] -= 1
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return coco_data
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def main():
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dataset_dir = Path('dataset_coco')
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for split in ['train', 'valid', 'test']:
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ann_file = dataset_dir / split / '_annotations.coco.json'
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if not ann_file.exists():
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print(f"Warning: {ann_file} not found, skipping")
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continue
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print(f"Processing {ann_file}...")
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# Load data
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with open(ann_file, 'r') as f:
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data = json.load(f)
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# Fix class IDs
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fixed_data = fix_class_ids(data)
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# Save back
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with open(ann_file, 'w') as f:
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json.dump(fixed_data, f, indent=2)
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print(f"✅ Fixed {len(data['annotations'])} annotations and {len(data['categories'])} categories")
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print("🎉 All COCO annotations fixed for 0-based class indexing!")
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if __name__ == '__main__':
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main()
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