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fix errors in validate polygons (temp solution) #286

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May 15, 2023
Merged

fix errors in validate polygons (temp solution) #286

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11 changes: 7 additions & 4 deletions mindocr/data/transforms/general_transforms.py
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Original file line number Diff line number Diff line change
Expand Up @@ -314,30 +314,33 @@ class ValidatePolygons:
"""
def __init__(self, min_area: float = 1.0):
self._min_area = min_area
#self.fix_when_invalid = fix_when_invalid

def __call__(self, data: dict):
size = data.get('actual_size', np.array(data['image'].shape[:2]))[::-1] # convert to x, y coord
border = box(0, 0, *size)

new_polys, new_texts, new_tags = [], [], []
for np_poly, text, ignore in zip(data['polys'], data['texts'], data['ignore_tags']):
if ((0 <= np_poly) & (np_poly < size)).all(): # if the polygon is fully within the image
poly = Polygon(np_poly)
if (not poly.is_valid) or (poly.is_empty):
#poly = poly.buffer(0)
continue

elif ((0 <= np_poly) & (np_poly < size)).all(): # if the polygon is fully within the image
new_polys.append(np_poly)

else:
poly = Polygon(np_poly)
if poly.intersects(border): # if the polygon is partially within the image
poly = poly.intersection(border)
if poly.area < self._min_area:
ignore = True

poly = poly.exterior
poly = poly.coords[::-1] if poly.is_ccw else poly.coords # sort in clockwise order
new_polys.append(np.array(poly[:-1]))

else: # the polygon is fully outside the image
continue

new_tags.append(ignore)
new_texts.append(text)

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