Keyphrases
- np hard
- matching algorithm
- preprocessing
- improved algorithm
- experimental evaluation
- tree structure
- objective function
- times faster
- significant improvement
- learning algorithm
- optimization algorithm
- energy function
- high accuracy
- cost function
- k means
- optimal solution
- similarity measure
- single pass
- least squares
- segmentation algorithm
- computationally efficient
- expectation maximization
- input data
- computational complexity
- multiscale
- feature extraction