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# Copyright (c) Meta Platforms, Inc. and affiliates.
# All rights reserved.
#
# This source code is licensed under the license found in the
# LICENSE file in the root directory of this source tree.
import torch
from ..utils import ext_loader
ext_module = ext_loader.load_ext('_ext', ['min_area_polygons'])
def min_area_polygons(pointsets: torch.Tensor) -> torch.Tensor:
"""Find the smallest polygons that surrounds all points in the point sets.
Args:
pointsets (Tensor): point sets with shape (N, 18).
Returns:
torch.Tensor: Return the smallest polygons with shape (N, 8).
"""
polygons = pointsets.new_zeros((pointsets.size(0), 8))
ext_module.min_area_polygons(pointsets, polygons)
return polygons
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