Discriminative Learning of Local Image Descriptors

Learning Non-Parametric
Descriptors (E-block)
E4: Seeking the embedding space under which the
distances between match pairs are minimized and the
distances between non-matches pairs are maximized.
J ( w)
l
ij
0
T
( w ( x x ))
2
T
2
( w ( x ))
l 1 i x
j
ij
i j
E6: Find projections that minimize the ratio of in-class
variance for match pairs to the total data variance.
( wx)
T 2
xiS i
3( )
T
2
( w ( x ))
l 1 i x
j
J w
ij
2