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KS
The keypoint similarity for keypoint type i is expressed by this equation
where, di is the Euclidean distance between the ground truth and predicted keypoint i
k is the constant for keypoint i
s is the scale of the ground truth object; s2 hence becomes the object¡¯s segmented area.
For each keypoint, 0 < KS < 1.
Visibility Flag
COCO specifies that each ground truth annotated keypoint should have a visibility flag. The visibility flag can assume either of the three values:
0: denotes for an unlabeled keypoint
1: denotes for that the keypoint is labeled but not visible
2: denotes for s that the keypoint is labeled and visible
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IEEE/ICACT20240435 Slide.08
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