Elastic matching in linear time and constant space

@inproceedings{MacLean2010ElasticMI,
  title={Elastic matching in linear time and constant space},
  author={Scott MacLean and George Labahn},
  year={2010}
}
Dynamic time warping (DTW) is well known as an effective method for model-based symbol recognition. Unfortunately, its complexity is quadratic in the number of points present in the symbols to be matched. In this paper, we propose a greedy approximate solution to Tappert’s dynamic program formulation of DTW, and show empirically that it performs as well as the exact solution while requiring only linear time to compute. 
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