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⚡️ Speed up function convert_to_coco by 77% #66

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⚡️ Speed up function convert_to_coco by 77% #66

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82 changes: 37 additions & 45 deletions unstructured/staging/base.py
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Original file line number Diff line number Diff line change
Expand Up @@ -530,51 +530,43 @@ def convert_to_coco(
categories = sorted(set(TYPE_TO_TEXT_ELEMENT_MAP.keys()))
categories = [{"id": i + 1, "name": cat} for i, cat in enumerate(categories)]
coco_dataset["categories"] = categories

# Index category name to id for faster lookup
category_name_to_id = {cat["name"]: cat["id"] for cat in categories}

# Handle Annotations
annotations = [
{
"id": el["element_id"],
"category_id": [x["id"] for x in categories if x["name"] == el["type"]][0],
"bbox": (
[
float(el["metadata"].get("coordinates")["points"][0][0]),
float(el["metadata"].get("coordinates")["points"][0][1]),
float(
abs(
el["metadata"].get("coordinates")["points"][0][0]
- el["metadata"].get("coordinates")["points"][2][0]
)
),
float(
abs(
el["metadata"].get("coordinates")["points"][0][1]
- el["metadata"].get("coordinates")["points"][1][1]
)
),
]
if el["metadata"].get("coordinates")
else []
),
"area": (
(
float(
abs(
el["metadata"].get("coordinates")["points"][0][0]
- el["metadata"].get("coordinates")["points"][2][0]
)
)
* float(
abs(
el["metadata"].get("coordinates")["points"][0][1]
- el["metadata"].get("coordinates")["points"][1][1]
)
)
)
if el["metadata"].get("coordinates")
else None
),
}
for el in element_dicts
]
annotations = []
for el in element_dicts:
# Maintain original behavior: raise IndexError for unknown types
try:
category_id = category_name_to_id[el["type"]]
except KeyError:
# Convert KeyError to IndexError to match original behavior
raise IndexError("list index out of range")

coordinates = el["metadata"].get("coordinates")
if coordinates:
bbox = [
float(coordinates["points"][0][0]),
float(coordinates["points"][0][1]),
float(abs(coordinates["points"][0][0] - coordinates["points"][2][0])),
float(abs(coordinates["points"][0][1] - coordinates["points"][1][1])),
]
area = float(abs(coordinates["points"][0][0] - coordinates["points"][2][0])) * float(
abs(coordinates["points"][0][1] - coordinates["points"][1][1])
)
else:
bbox = []
area = None

annotations.append(
{
"id": el["element_id"],
"category_id": category_id,
"bbox": bbox,
"area": area,
}
)

coco_dataset["annotations"] = annotations
return coco_dataset