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avoid zero division in bbox2loc #459

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Oct 20, 2017
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avoid zero division in bbox2loc #459

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4 changes: 4 additions & 0 deletions chainercv/links/model/faster_rcnn/utils/bbox2loc.py
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Original file line number Diff line number Diff line change
Expand Up @@ -54,6 +54,10 @@ def bbox2loc(src_bbox, dst_bbox):
base_ctr_y = dst_bbox[:, 0] + 0.5 * base_height
base_ctr_x = dst_bbox[:, 1] + 0.5 * base_width

eps = xp.finfo(height.dtype).eps
height = xp.maximum(height, eps)
width = xp.maximum(width, eps)

dy = (base_ctr_y - ctr_y) / height
dx = (base_ctr_x - ctr_x) / width
dh = xp.log(base_height / height)
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