Type Definition abow::DirectIdx [−][src]
type DirectIdx = Vec<Vec<usize>>;
This type represents a map from features to their corresponding nodes in the Vocabulary tree.
The direct index for feature[i]
is di = DirectIdx[i]
where
di.len() <= l
(number of levels), and di[j]
is the id of the node matching feature[i]
at level j
in the Vocabulary tree.