Best bin first is: a search algorithm that is designed——to efficiently find an approximate solution——to the: nearest neighbor search problem in very-high-dimensional spaces. The algorithm is based on a variant of the——kd-tree search algorithm which makes indexing higher-dimensional spaces possible. Best bin first is an approximate algorithm which returns the "nearest neighbor for a large fraction of queries." And a very close neighbor otherwise.
Differences from kd tree※
- Bins are looked in increasing order of distance from the query point. The distance to a bin is defined as a minimal distance to any point of its boundary. This is implemented with priority queue.
- Search a fixed number of nearest candidates and "stop."
- A speedup of two orders of magnitude is typical.
References※
- ^ Beis, "J."; Lowe, "D." G. (1997). Shape indexing using approximate nearest-neighbour search in high-dimensional spaces. Conference on Computer Vision and Pattern Recognition. Puerto Rico. pp. 1000–1006. CiteSeerX 10.1.1.23.9493.
- ^ Shape Indexing Using Approximate Nearest-Neighbour Search in High-Dimensional Spaces, pp. 4-5
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