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Add function getImgIdsUnion. #2

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Add function getImgIdsUnion. #2

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23 changes: 23 additions & 0 deletions PythonAPI/pycocotools/coco.py
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Original file line number Diff line number Diff line change
Expand Up @@ -198,6 +198,29 @@ def getImgIds(self, imgIds=[], catIds=[]):
ids &= set(self.catToImgs[catId])
return list(ids)

#get IDs of images which contain one or more of each category
def getImgIdsUnion(self, imgIds=[], catIds=[]):
'''
Get img ids that satisfy given filter conditions.
:param imgIds (int array) : get imgs for given ids
:param catIds (int array) : get imgs with all given cats
:return: ids (int array) : integer array of img ids
'''
imgIds = imgIds if _isArrayLike(imgIds) else [imgIds]
catIds = catIds if _isArrayLike(catIds) else [catIds]

if len(imgIds) == len(catIds) == 0:
ids = self.imgs.keys()
else:
ids = set(imgIds)
for i, catId in enumerate(catIds):
if i == 0 and len(ids) == 0:
ids = set(self.catToImgs[catId])
else:
ids |= set(self.catToImgs[catId])
return list(ids)


def loadAnns(self, ids=[]):
"""
Load anns with the specified ids.
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