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[Fix] Fix piece_expected_num in IoUNegPiecewiseSampler #2017

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merged 2 commits into from
Nov 17, 2022
Merged

[Fix] Fix piece_expected_num in IoUNegPiecewiseSampler #2017

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e9e350e
Update iou_neg_piecewise_sampler.py
oyel Nov 11, 2022
a64c6a5
fix lint
JingweiZhang12 Nov 15, 2022
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10 changes: 7 additions & 3 deletions mmdet3d/models/task_modules/samplers/iou_neg_piecewise_sampler.py
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Original file line number Diff line number Diff line change
@@ -1,4 +1,6 @@
# Copyright (c) OpenMMLab. All rights reserved.
import math

import torch

from mmdet3d.registry import TASK_UTILS
Expand Down Expand Up @@ -74,9 +76,11 @@ def _sample_neg(self, assign_result, num_expected, **kwargs):
# if the numbers of negative samplers in previous
# pieces are less than the expected number, extend
# the same number in the current piece.
piece_expected_num = int(
num_expected *
self.neg_piece_fractions[piece_inds]) + extend_num
piece_expected_num = min(
num_expected,
math.ceil(num_expected *
self.neg_piece_fractions[piece_inds]) +
extend_num)
min_iou_thr = self.neg_iou_thr[piece_inds + 1]
max_iou_thr = self.neg_iou_thr[piece_inds]
piece_neg_inds = torch.nonzero(
Expand Down