SIFT  1.1.2
Data Structures
Here are the data structures with brief descriptions:
oCdetection_dataHolds feature data relevant to detection
oCfeatureStructure to represent an affine invariant image feature
oCkd_nodeNode in a k-d tree
oCmin_pqMinimizing priority queue
oCpq_nodeElement in a minimizing priority queue
\Cransac_dataHolds feature data relevant to ransac