Keyphrases
- preprocessing
- learning algorithm
- feature extraction
- theoretical analysis
- computational complexity
- computational cost
- linear feature extraction
- improved algorithm
- tree structure
- detection algorithm
- worst case
- optimal solution
- dynamic programming
- experimental evaluation
- times faster
- matching algorithm
- k means
- convergence rate
- simulated annealing
- expectation maximization
- computationally efficient
- objective function
- similarity measure
- clustering method
- data sets
- feature selection
- convex hull
- face recognition
- high accuracy
- search space
- np hard
- multi objective
- significant improvement