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41 lines
1.6 KiB
41 lines
1.6 KiB
# Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved. |
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# |
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# Licensed under the Apache License, Version 2.0 (the "License"); |
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# you may not use this file except in compliance with the License. |
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# You may obtain a copy of the License at |
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# |
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# http://www.apache.org/licenses/LICENSE-2.0 |
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# |
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# Unless required by applicable law or agreed to in writing, software |
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# distributed under the License is distributed on an "AS IS" BASIS, |
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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# See the License for the specific language governing permissions and |
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# limitations under the License. |
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def bbox_area(src_bbox): |
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if src_bbox[2] < src_bbox[0] or src_bbox[3] < src_bbox[1]: |
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return 0. |
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else: |
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width = src_bbox[2] - src_bbox[0] |
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height = src_bbox[3] - src_bbox[1] |
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return width * height |
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def jaccard_overlap(sample_bbox, object_bbox): |
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if sample_bbox[0] >= object_bbox[2] or \ |
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sample_bbox[2] <= object_bbox[0] or \ |
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sample_bbox[1] >= object_bbox[3] or \ |
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sample_bbox[3] <= object_bbox[1]: |
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return 0 |
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intersect_xmin = max(sample_bbox[0], object_bbox[0]) |
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intersect_ymin = max(sample_bbox[1], object_bbox[1]) |
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intersect_xmax = min(sample_bbox[2], object_bbox[2]) |
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intersect_ymax = min(sample_bbox[3], object_bbox[3]) |
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intersect_size = (intersect_xmax - intersect_xmin) * ( |
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intersect_ymax - intersect_ymin) |
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sample_bbox_size = bbox_area(sample_bbox) |
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object_bbox_size = bbox_area(object_bbox) |
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overlap = intersect_size / ( |
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sample_bbox_size + object_bbox_size - intersect_size) |
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return overlap
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