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Fix bug binary_mask_to_polygon when multiple contours of disjoint are… #52

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Fix bug binary_mask_to_polygon when multiple contours of disjoint are… #52

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3 changes: 2 additions & 1 deletion pycococreatortools/pycococreatortools.py
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Original file line number Diff line number Diff line change
Expand Up @@ -45,8 +45,9 @@ def binary_mask_to_polygon(binary_mask, tolerance=0):
# pad mask to close contours of shapes which start and end at an edge
padded_binary_mask = np.pad(binary_mask, pad_width=1, mode='constant', constant_values=0)
contours = measure.find_contours(padded_binary_mask, 0.5)
contours = np.subtract(contours, 1)

for contour in contours:
contour = np.subtract(contour, 1)
contour = close_contour(contour)
contour = measure.approximate_polygon(contour, tolerance)
if len(contour) < 3:
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